Updated on 2026/04/17

写真a

 
MARUYAMA TAIZO
 
Organization
School of Environment and Society Associate Professor
Title
Associate Professor
Contact information
メールアドレス
Homepage
http://maruyama.cv.ens.titech.ac.jp/
External link

Degree

  • Doctor of Engineering ( 2016.3   Tokyo Institute of Technology )

  • Master of Engineering ( 2013.3   Tokyo Institute of Technology )

Research Interests

  • Nondestructive evaluation

  • Computational mechanics

  • Elastic wave

  • Applied mechanics

Research Areas

  • Social Infrastructure (Civil Engineering, Architecture, Disaster Prevention) / Structure engineering and earthquake engineering

Education

  • Tokyo Institute of Technology   Graduate School of Information Science and Engineering

    2013.4 - 2016.3

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    Country： Japan

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  • Tokyo Institute of Technology   Graduate School of Information Science and Engineering

    2011.4 - 2013.3

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    Country： Japan

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  • Tokyo Institute of Technology   School of Engineering

    2007.4 - 2011.3

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    Country： Japan

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Research History

  • Institute of Science Tokyo   School of Environment and Society   Associate Professor

    2024.10

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  • Ehime University   Faculty of Engineering   Guest Associate Professor

    2023.6 - 2025.3

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    Country：Japan

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  • Tokyo Institute of Technology   School of Environment and Society   Associate Professor

    2023.4 - 2024.9

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    Country：Japan

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  • Ehime University   Graduate School of Science and Engineering Engineering for Production and Environment   Associate Professor

    2022.10 - 2023.3

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    Country：Japan

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  • Ehime University   Graduate School of Science and Engineering Engineering for Production and Environment   Lecturer

    2019.10 - 2022.9

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    Country：Japan

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  • Tokyo University of Science   Faculty of Science and Technology   Assistant Professor

    2016.4 - 2019.9

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    Country：Japan

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Professional Memberships

  • The Japanese Society for Non-Destructive Inspection

    2016.4

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  • Japan Society for Computational Methods in Engineering

    2016.4

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  • Japan Society of Civil Engineers

    2016.4

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Committee Memberships

  • 土木学会   応用力学委員会 計算力学×α小委員会幹事  

    2025.6   

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    Committee type：Academic society

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  • 第67理論応用力学講演会運営委員会   委員  

    2023.11 - 2024.10   

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    Committee type：Academic society

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  • 土木学会 応用力学委員会   幹事  

    2023.6   

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    Committee type：Academic society

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  • 土木学会   応用力学委員会 計算力学×α小委員会委員  

    2022.4   

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    Committee type：Academic society

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  •   第66回理論応用力学講演会運営委員会委員  

    2021.10 - 2022.6   

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    Committee type：Academic society

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  • 日本計算数理工学会   理事  

    2021.4   

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    Committee type：Academic society

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  • 土木学会   全国大会委員会委員  

    2020.12 - 2022.11   

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    Committee type：Academic society

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  • 土木学会   応用力学委員会地区幹事（四国）  

    2020.6 - 2023.5   

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    Committee type：Academic society

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  • 日本計算数理工学会   監事  

    2018.3 - 2020.2   

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    Committee type：Academic society

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  • 土木学会   年次講演会プログラム編成委員（第一部門）  

    2017.4 - 2020.3   

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    Committee type：Academic society

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  • 土木学会   応用力学委員会 計算力学小委員会委員  

    2016.10 - 2022.3   

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Papers

  • A paraxial beam solution for ultrasonic guided waves in anisotropic elastic plates Reviewed

    Taizo Maruyama, Sumika Yamada, Akira Furukawa

    Ultrasonics   149   107588   2025.5

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.ultras.2025.107588

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  • Numerical study on guided-wave reflection and transmission at water pipe joint using hybrid finite element method Reviewed

    Taizo Maruyama, Taisei Matsuo, Kazuyuki Nakahata

    Computational Mechanics   75   285 - 300   2024.6

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    Abstract

    This study investigates guided-wave reflection and transmission at a water pipe joint. The system comprises a linearly elastic pipe filled with water with a joint that is modeled as a discontinuity of the solid region. Wave reflection and transmission are solved using the finite element method (FEM) with radiation conditions for reflected and transmitted guided waves into infinite waveguides. For the radiation conditions, the reflected and transmitted waves are expressed by modal expansion using the semi-analytical finite-element (SAFE) dispersion analysis method. This study extends the hybrid SAFE-FEM to the coupled fluid–solid axisymmetric problem. Numerical results demonstrate that the hybrid SAFE-FEM provides sufficiently accurate solutions. The propagation modes, similar to the modes in a solid pipe, are strongly or perfectly reflected by the joint. However, the modes are transmitted through the joint with little scattering after they converge to the modes in a water bar. The crossing of dispersion curves with those for modes in a solid pipe causes mode conversion and induces scattering attenuation.

    DOI： 10.1007/s00466-024-02505-0

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    Other Link： https://link.springer.com/article/10.1007/s00466-024-02505-0/fulltext.html

  • Three-dimensional hybrid SAFE-BEM for elastic guided-wave scattering in a plate with finite width Reviewed

    Taizo Maruyama, Kosuke Kanda, Sumika Yamada

    Engineering Analysis with Boundary Elements   163   426 - 435   2024.6

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.enganabound.2024.03.027

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  • Derivation of an in-plane amplitude equation and its paraxial approximation for elastic guided waves in plates Reviewed

    Taizo Maruyama, Kosuke Kanda

    International Journal of Solids and Structures   281   112420   2023.7

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.ijsolstr.2023.112420

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  • Harmonic balance-boundary element and continuation methods for steady-state wave scattering by interior and surface-breaking cracks with contact acoustic nonlinearity Reviewed

    Taizo Maruyama

    International Journal of Solids and Structures   210-211   310 - 324   2021.2

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    Authorship：Lead author,　Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.ijsolstr.2020.11.007

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  • Steady-state anti-plane shear wave scattering by a crack with friction Reviewed

    Taizo Maruyama, Terumi Touhei

    Journal of the Acoustical Society of America   143 ( 6 )   3545 - 3556   2018.6

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    Authorship：Lead author,　Corresponding author   Publishing type：Research paper (scientific journal)  

    DOI： 10.1121/1.5042163

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  • Numerical study on sub-harmonic generation due to interior and surface breaking cracks with contact boundary conditions using time-domain boundary element method Reviewed

    Taizo Maruyama, Takahiro Saitoh, Sohichi Hirose

    International Journal of Solids and Structures   126-127   74 - 89   2017.11

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    Authorship：Lead author,　Corresponding author   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.ijsolstr.2017.07.029

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  • Transient elastic wave analysis of 3-D large-scale cavities by fast multipole BEM using implicit Runge-Kutta convolution quadrature Reviewed

    T. Maruyama, T. Saitoh, T. Q. Bui, S. Hirose

    Computer Methods in Applied Mechanics and Engineering   303   231 - 259   2016.5

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    Authorship：Lead author,　Corresponding author   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.cma.2016.02.002

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  • A fast direct solver for two-dimensional transmission problems of elastic waves Reviewed

    Yasuhiro Matsumoto, Taizo Maruyama

    Engineering with Computers   42   68 - 68   2026.3

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1007/s00366-026-02302-8

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    Other Link： https://link.springer.com/article/10.1007/s00366-026-02302-8

  • Modeling of elastic waves propagating through a steel bar embedded in concrete and its experimental verification Reviewed

    Kazuyuki Nakahata, Keishi Wada, Kyosuke Shimizu, Taizo Maruyama

    72A   543 - 551   2026.3

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.11532/structcivil.72A.543

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  • Mode-selective transmission method of guided waves using data processing

    Kosuke Kanda, Taizo Maruyama, Sumika Yamada

    2026

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  • A multivariate complex-domain root-finding algorithm with shift-differencing screening and occupancy-driven mesh refinement

    Zelin Xu, Tiqing Wang, Peng Li, Bin Wang, Zhenghua Qian, Taizo Maruyama, Feng Zhu, Iren Kuznetsova

    2026

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  • On Numerical Symmetry of Coefficient Matrix in the PMCHWT Formulation for Elastodynamic Transmission Problem Reviewed

    Taizo Maruyama, Yasuhiro Matsumoto

    25   87 - 93   2025.12

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  • SH wave scattering in Eringen’s nonlocal elastic solid using the method of fundamental solutions Reviewed

    Akira Furukawa, Taizo Maruyama, Takahiro Saitoh, Sohichi Hirose, Davinder Kumar, Dilbag Singh, Sushil K. Tomar

    Engineering Analysis with Boundary Elements   179   106410 - 106410   2025.10

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.enganabound.2025.106410

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  • Modal Excitation for Cracks in Two-Dimensional Elastic Half-Plane Using Boundary Element and Perturbation Methods Reviewed

    Taizo Maruyama, Naohiro Sugita

    Journal of Vibration and Acoustics   147 ( 6 )   061007   2025.8

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：ASME International  

    Abstract

    This article presents a perturbation analysis for resonance excitation in an open domain. As a fundamental study, it addresses wave scattering by a crack in a two-dimensional domain to avoid fictitious eigenfrequency issues, which are encountered in boundary integral equations. The system comprises a homogeneous, isotropic, and linearly elastic half-plane containing interior cracks. The modal amplitude is approximated using the perturbation method with a Taylor expansion around the complex-valued eigenfrequency for the open domain. The eigenfrequency problem for an open domain is solved using the boundary element method and the Sakurai–Sugiura method, which is a nonlinear eigensolver. Several numerical results demonstrate that the developed perturbation method approximately evaluates the modal amplitude due to real-valued frequency excitation.

    DOI： 10.1115/1.4069136

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  • Analysis of guided wave propagation in highly damped viscoelastic multilayered composite structures using the Biot model Reviewed

    Zelin Xu, Tiqing Wang, Peng Li, Bin Wang, Zhenghua Qian, Taizo Maruyama, Feng Zhu, Iren Kuznetsova

    Ultrasonics   155   107724   2025.6

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    DOI： 10.1016/j.ultras.2025.107724

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  • Continuation approach combined with semi-analytical finite-element method for solving guided-wave dispersion equation Reviewed

    Taizo Maruyama, Kazuyuki Nakahata

    Journal of Nondestructive Evaluation   44   55   2025.5

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    Abstract

    The present article introduces a tracing algorithm for dispersion curves for guided waves. The quadratic eigenvalue problem for dispersion analysis is constructed in a semi-analytical finite-element model. The eigenvalue problem is converted into a system of nonlinear equations by introducing phase and amplitude conditions for the eigenvector. Solutions of the system of nonlinear equations are traced by means of a numerical continuation method (NCM). The proximity of dispersion curves, which is referred to as mode veering, becomes a problem in the NCM tracing process. In order to overcome the mode-veering issue, constraints on the tangential and curvature vectors for the dispersion curve are proposed. Several numerical results demonstrate that the proposed NCM can trace dispersion curves appropriately, even for mode-veering cases. Furthermore, the group velocities of guided waves can be calculated easily and accurately in the proposed formulation.

    DOI： 10.1007/s10921-025-01194-w

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    Other Link： https://link.springer.com/article/10.1007/s10921-025-01194-w/fulltext.html

  • Linearly scalable fast direct solver based on proxy surface method for two-dimensional elastic wave scattering by cavity Reviewed

    Yasuhiro Matsumoto, Taizo Maruyama

    Engineering Analysis with Boundary Elements   173   106148   2025.4

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.enganabound.2025.106148

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  • ゲート制御レーザ超音波照射を用いたカットオフ周波数検出による残存板厚の測定 Reviewed

    中畑和之, 山内謙汰, 清水鏡介, 丸山泰蔵, 林高弘

    構造工学論文集   71A   470 - 476   2025.3

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.11532/structcivil.71A.470

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  • H行列法を用いたグリッドベース領域積分方程式法の高速化 Reviewed

    丸山泰蔵

    計算数理工学論文集   24   19 - 24   2024.12

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  • proxy法による2次元動弾性層ポテンシャルの効率的低ランク近似 Reviewed

    松本安弘, 丸山泰蔵

    計算数理工学論文集   24   73 - 78   2024.12

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  • Application of eigenfrequency for an open domain to excitation problems using boundary element and perturbation methods Reviewed

    Transactions of the Japan Society for Computational Methods in Engineering (JASCOME)   23   93 - 98   2023.11

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  • Theoretical analysis of forced Lamb waves using the method of multiple scales and Green’s function method Reviewed

    Kosuke Kanda, Taizo Maruyama

    Acta Mechanica   234 ( 8 )   3533 - 3546   2023.5

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1007/s00707-023-03573-8

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    Other Link： https://link.springer.com/article/10.1007/s00707-023-03573-8/fulltext.html

  • Reflection of plane waves from the stress-free boundary of a nonlocal elastic solid half-space containing double porosity Reviewed

    Davinder Kumar, Dilbag Singh, Sushil K. Tomar, Sohichi Hirose, Takahiro Saitoh, Akira Furukawa, Taizo Maruyama

    Archive of Applied Mechanics   2023.3

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1007/s00419-023-02377-5

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  • Nondestructive detection of fatigue crack using amplitude change of ultrasonic wave in local vibration Reviewed

    Airu Kawasaki, Kei Onodera, Taizo Maruyama, Manabu Takahashi, Junichi Katsuta, Kazuyuki Nakahata

    69A   617 - 624   2023.3

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.11532/structcivil.69A.617

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  • Simulation of;hotoacoustic wave generation;propagation using finite integration technique;its experimental validation Reviewed

    Akihiro MIKI, Taizo MARUYAMA, Kazuyuki NAKAHATA

    79 ( 15 )   22-15004   2023

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  • EXPERIMENTAL STUDY OF ULTRASONIC IMAGING USING MULTI-FREQUENCY MUSIC METHOD Reviewed

    Taisei MATSUO, Taizo MARUYAMA, Kazuyuki NAKAHATA

    Transactions of the Japan Society for Computational Methods in Engineering (JASCOME)   22   163 - 169   2022.12

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  • DISPERSION ANALYSIS OF GUIDED WAVES IN A WATER PIPE BURIED IN THE GROUND USING SEMI-ANALYTICAL FINITE ELEMENT METHOD Reviewed

    Taizo MARUYAMA, Kazuyuki NAKAHATA

    Transactions of the Japan Society for Computational Methods in Engineering (JASCOME)   22   139 - 145   2022.12

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  • ACCURACY ENHANCEMENT OF FLAW IMAGING FOR ADAPTIVE FSAP USING PARTICLE FILTER Reviewed

    Yasuhiko SAITO, Kyohei HAYASHI, Taizo MARUYAMA, Kazuyuki NAKAHATA, Sohichi HIROSE

    3 ( J2 )   682 - 692   2022.11

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    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.11532/jsceiii.3.J2_682

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  • Theoretical analysis of the dispersion of Lamb waves forming a wave packet of finite-bandwidth using the method of multiple scales Reviewed

    Kosuke Kanda, Taizo Maruyama

    International Journal of Solids and Structures   234-235   111268 - 111268   2022.1

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.ijsolstr.2021.111268

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  • Application of a Particle Filter to Flaw Identification for Ultrasonic Nondestructive Evaluation: Assimilation of Simulated and Measured Data Reviewed

    Kazuyuki Nakahata, Taizo Maruyama, Sohichi Hirose

    Journal of Nondestructive Evaluation   40 ( 2 )   No.34   2021.6

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

    DOI： 10.1007/s10921-021-00765-x

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    Other Link： http://link.springer.com/article/10.1007/s10921-021-00765-x/fulltext.html

  • 機械学習による界面補間を援用した二層体に対するアレイ超音波イメージング Reviewed

    中畑和之, 都築幸乃, 牧田陽行, 林恭平, 丸山泰蔵

    AI・データサイエンス論文集   2 ( J2 )   466 - 474   2021

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  • Development of elastodynamic finite integration technique for two-dimensional micropolar elastodynamics Reviewed

    T. Saitoh, Y. Suzuki, T. Maruyama, A. Furukawa, S. Hirose, D. Kumaar, D. Singh, S. K. Tomar

    Transactions of the Japan Society for Computational Methods in Engineering (JASCOME)   21   1 - 8   2021

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  • 閉口き裂による3次元散乱問題に対する調和バランス-境界要素法 Reviewed

    丸山泰蔵, 中畑和之

    土木学会論文集A2（応用力学）   77 ( 2 )   I_137 - I_143   2021

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    Authorship：Lead author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.2208/jscejam.77.2_I_137

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  • APPLICATION OF H -MATRIX METHOD TO HARMONIC BALANCE-BOUNDARY ELEMENT METHOD FOR SCATTERING PROBLEM BY A CLOSED CRACK Reviewed

    Taizo MARUYAMA

    Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))   76 ( 2 )   I_173 - I_181   2020

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    Authorship：Lead author,　Last author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japan Society of Civil Engineers  

    DOI： 10.2208/jscejam.76.2_i_173

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  • Pseudo-projection approach to reconstruct locations of point-like scatterers characterized by Lamé parameters and mass densities in an elastic half-space Reviewed

    Terumi Touhei, Taizo Maruyama

    International Journal of Solids and Structures   169   187 - 204   2019.9

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.ijsolstr.2019.04.019

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  • On stability of steady-state solutions by harmonic balance-boundary element method for scattering problems by a crack with contact acoustic nonlinearity Reviewed

    Taizo Maruyama, Terumi Touhei

    74 ( 2 )   I_179 - I_189   2018

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  • Harmonic balance-boundary element method for scattering problem with contact acoustic nonlinearity on crack face Reviewed

    Taizo Maruyama, Terumi Touhei

    17   65 - 70   2017

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  • 3-D numerical simulation of sub-harmonic generation phenomenon due to contact acoustic nonlinearity on crack faces Reviewed

    Taizo Maruyama, Takahiro Saitoh, Sohichi Hirose

    72 ( 2 )   I_217 - I_226   2016

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  • SPATIOTEMPORALLY ACCELERATED CQ-BEM FOR 3-D ACOUSTIC WAVE PROBLEMS Reviewed

    15   67 - 72   2015.12

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  • 2-D Simulation of Sub-harmonic Generation Due to Cracks with Contact-boundary Conditions Reviewed

    Taizo Maruyama, Takahiro Saitoh, Sohichi Hirose

    Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))   71 ( 2 )   I_299 - I_310   2015

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    Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japan Society of Civil Engineers  

    The nonlinear ultrasonic testing has attracted notice as a new technique for detection of closed cracks which cannot be found by the linear one. However, the generation mechanism of sub-harmonic wave, which is one of the nonlinear ultrasonic waves, has not been understood clearly from theoretical point of view yet although it is considered as caused by the dynamic interaction of crack faces such as clapping or friction. In this paper, the boundary integral equation for two-dimensional crack problems is formulated and numerically solved to investigate the behavior of the sub-harmonic wave. Some numerical results of sub-harmonic generation are obtained and discussed.

    DOI： 10.2208/jscejam.71.I_299

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  • IMPLICIT RUNGE-KUTTA BASED CQ-FMBEM FOR COUPLED ACOUSTIC-ELASTIC WAVE PROBLEMS Reviewed

    14   55 - 60   2014.12

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  • Analysis of elastic wave scattering by 3-D crack with contact boundary conditions using convolution quadrature boundary element method Reviewed

    14   31 - 36   2014.12

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  • 3-D Numerical Simulation of Nonlinear Ultrasonic Testing Using CQ-BEM Reviewed

    MARUYAMA Taizo, SAITOH Takahiro, HIROSE Sohichi

    Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))   70 ( 2 )   I_235 - I_246   2014

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    Authorship：Lead author   Language：Japanese   Publisher：Japan Society of Civil Engineers  

    The nonlinear ultrasonic testing is expected to be an effective technique for detection of closed cracks which cannot be detected by the linear ultrasonic testing. However, although the nonlinear ultrasonic waves such as higher- and sub-harmonics are considered as generated by the interaction of the crack faces such as clapping motion or friction, the mechanism of generation has not been understood clearly from theoretical viewpoints yet. Therefore, the boundary integral equation for an interface crack with nonlinear boundary conditions in 3-D is formulated, and numerically solved using the convolution quadrature time-domain boundary element method (CQ-BEM) in order to investigate the behavior of nonlinear ultrasonic generation.

    DOI： 10.2208/jscejam.70.I_235

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  • Implicit Runge-Kutta Based Convolution Quadrature Time-domain Fast Multipole Boundary Element Method for 3-D Scalar Wave Problems Reviewed

    MARUYAMA Taizo, SAITOH Takahiro, HIROSE Sohichi

    Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))   69 ( 2 )   I_175 - I_185   2013

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    Authorship：Lead author   Language：Japanese   Publisher：Japan Society of Civil Engineers  

    This paper presents an implicit Runge-Kutta (IRK) based convolution quadrature time-domain fast multipole boundary element method (CQ-FMBEM). Application of a convolution quadrature method (CQM) to a time-domain boundary element method (BEM), which is called CQ-BEM, can improve numerical stability of time-stepping procedure. In recent researches, the IRK based CQ-BEM showed better performance than the conventional linear multistep based one regarding accuracy. However, the IRK based CQ-BEM requires more computational time and memory. Therefore, in this paper, the fast multipole method (FMM) is applied to the IRK based CQ-BEM for 3-D scalar wave propagation problems. The formulation of the IRK based CQ-BEM and the application of the FMM are described. The accuracy and computational efficiency of the proposal method are compared with the linear multistep based CQ-FMBEM by solving some numerical examples.

    DOI： 10.2208/jscejam.69.I_175

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  • Implicit Runge-Kutta Based Convolution Quadrature Boundary Element Method and Its Application to 3-D Scalar Wave Propagation Problems Reviewed

    12   91 - 96   2012.12

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    Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

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  • Development of Convolution Quadrature Time-Domain Boundary Element Method for Fluid-Elastic Half Space and Its Application to Air-Coupled Ultrasonic Simulation Reviewed

    Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))   67 ( 2 )   I_145 - I_152   2011

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    Language：Japanese   Publisher：Japan Society of Civil Engineers  

    This paper presents a convolution quadrature time-domain boundary element method for fluid-elastic half space. Application of convolution quadrature method (CQM) to time-domain boundary element method (BEM), which is called CQ-BEM, can help improve numerical stability of time-stepping procedure. However, the conventional CQ-BEM for fluid-elastic half space has two disadvantages. First, it requires much memory to evaluate retarded potentials of time-stepping procedures. Second, it is difficult to couple both boundary integral equations for fluid and elastic half space with time-domain boundary conditions on fluid-elastic interface directly. The formulation presented herewith improves these disadvantages by transforming boundary values in time-domain into Fourier-domain. As numerical examples, air-coupled ultrasonic simulation is shown to validate the presented method.

    DOI： 10.2208/jscejam.67.I_145

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Books

  • 超音波による非破壊検査・材料評価技術の進展

    井原郁夫監修（ Role： Contributorpage 2-7）

    2024.3  （ ISBN:9784781318011 ）

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  • 理工系の基礎 土木工学

    土木工学編集委員会（ Role： Contributor第10章）

    丸善出版  2018.4  （ ISBN:4621302868 ）

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    Total pages：224   Language：Japanese  

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MISC

  • Modal Excitation Analysis for Interior and Surface-Breaking Cracks in Two-Dimensional Half Plane Using Boundary Element and Perturbation Methods

    Taizo Maruyama, Naohiro Sugita

    ASME 2024 International Mechanical Engineering Congress and Exposition   IMECE2024-141034   2025.1

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Article, review, commentary, editorial, etc. (international conference proceedings)   Publisher：American Society of Mechanical Engineers  

    Abstract

    This paper presents a perturbation analysis of the excitation problem for an open domain. As a fundamental study, it addresses wave scattering by a crack in a two-dimensional domain to avoid fictitious eigenfrequency issues, which are encountered in a boundary integral equation. The system comprises a homogeneous, isotropic, and linearly elastic half plane containing interior and surface-breaking cracks. The modal amplitude is approximated using the perturbation method with the Taylor expansion around the complex-valued eigenfrequency for the open domain. The eigenfrequency problem for an open domain is solved using boundary element method and Sakurai-Sugiura method, which is one of the nonlinear eigensolvers. Several numerical results demonstrate that the proposed perturbation method approximately evaluates the modal amplitude due to real-valued frequency excitation.

    DOI： 10.1115/imece2024-141034

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  • A numerical study on the relationship between local defect resonance and sub-harmonic resonance for closed cracks

    Taizo Maruyama, Tomoki Tanihira, Kazuyuki Nakahata

    Journal of Physics: Conference Series   2822   012102   2024

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    Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Article, review, commentary, editorial, etc. (international conference proceedings)  

    DOI： 10.1088/1742-6596/2822/1/012102

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  • 非線形超音波法を用いたき裂評価における分調波発生現象の数値シミュレーション

    丸山泰蔵

    機械の研究   75 ( 10 )   745 - 751   2023.10

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    Authorship：Lead author   Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

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  • Evaluating the validity of the computational method of Lamb wave scattering coefficients using semi-analytical finite element and boundary element methods Reviewed

    Kosuke Kanda, Taizo Maruyama

    Q20007   2021.4

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    Language：Japanese   Publishing type：Internal/External technical report, pre-print, etc.  

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  • Development of computer code for calculating scattering coefficients of Lamb waves using semi-analytical finite element and boundary element method Reviewed

    Q19008   2020.4

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  • 異種材料接合界面に対する三次元非線形超音波シミュレーション : 不完全接合界面の繰り返し打撃による高調波の発生特性 (特集 超音波分野の数値シミュレーション技術と実際)

    丸山 泰蔵, 廣瀬 壮一

    超音波techno   29 ( 5 )   18 - 22   2017.9

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    Language：Japanese   Publisher：日本工業出版  

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  • 2-D Wave Scattering Analysis by a Crack with Contact Boundary Conditions Using Harmonic Balance-Boundary Element Method

    22   4p   2017.5

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  • Steady-state analysis of nonlinear ultrasonic waves caused by crack face friction Reviewed

    Taizo Maruyama, Terumi Touhei

    Proceedings of Meetings on Acoustics   29 ( 1 )   2016.11

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  • Two-dimensional Simulation of Higher- and Sub-harmonic Generation Due to Cracks with Contact Boundary Conditions

    64 ( 12 )   586 - 592   2015.12

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    Language：Japanese  

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  • Simulation of Sub-harmonic Generation Due to Closed Cracks Using 2-D Time-domain Boundary Element Method

    20   6p   2015.6

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  • 216 A combined method of convolution quadrature time-domain Galerkin BEM and FEM for 2-D wave propagation

    ICHIKAWA Ryo, SAITOH Takahiro, MARUYAMA Taizo, HIROSE Sohichi

    The Proceedings of The Computational Mechanics Conference   2015 ( 0 )   _216 - 1_-_216-2_   2015

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    Language：Japanese   Publisher：The Japan Society of Mechanical Engineers  

    DOI： 10.1299/jsmecmd.2015.28._216-1_

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  • Three Dimensional Numerical Simulation of Ultrasonic Waves Considering Contact Acoustic Nonlinearity on Solid Interface

    63 ( 3 )   108 - 112   2014.3

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  • Improved ultrasonic SAFT imaging of flaws in structures with curved surfaces Reviewed

    Sohichi Hirose, Seitaro Nishimoto, Taizo Maruyama, Yasuaki Nagata

    AIP Conference Proceedings   1581 33   36 - 41   2014

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  • Simulation for air-coupled ultrasound testing using time-domain BEM Reviewed

    Taizo Maruyama, Takahiro Saitoh, Sohichi Hirose

    AIP Conference Proceedings   1581 33   550 - 555   2014

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  • J0420204 Evaluation of Steel Plate Bonding Using Laser Based Method

    HIROSE Sohichi, TACHIBANA Hajime, NAKAMOTO Keisuke, SHIMADA Yoshinori, KOTYAEV Oleg, YAMAGUCHI Yuuya, MARUYAMA Taizo

    The Proceedings of Mechanical Engineering Congress, Japan   2014 ( 0 )   _J0420204 - -_J0420204-   2014

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    Language：Japanese   Publisher：The Japan Society of Mechanical Engineers  

    In Japan, concrete slabs of highway bridges, especially ones constructed before 1970, have suffered fatigue damage due to repeated traffic loads. "Steel plate bonding method" has been widely used for over 30 years to strengthen damaged concrete slabs. In recent years, however, the repaired structures have also been damaged due to the debonding of adhesive resin between a steel plate and concrete. In this study, a laser based ultrasonic method is developed for remote inspection of bonded steel plates. Some results are obtained in a laboratory measurement of specimens, and are discussed in comparison with impact hammer method and numerical results. It is shown that the laser based method has a promising possibility of effective nondestructive evaluation for steel plate bonding of highway bridges.

    DOI： 10.1299/jsmemecj.2014._J0420204-

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  • Convolution Quadrature Fast Multipole Boundary Element Method for 3-D Elastodynamics

    Maruyama Taizo, Saitoh Takahiro, Hirose Sohichi

    NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan   62 ( 0 )   172 - 172   2013

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    Language：Japanese   Publisher：National Committee for IUTAM  

    This paper presents a convolution quadrature fast multipole boundary element method for 3-D elastodynamics. The formulation is based on the implicit Runge-Kutta method (IRK). In general, a convolution quadrature boundary element method (CQBEM) is known as effective and stable for time-domain wave propagation problems. In particular, IRK based CQBEM can produce higher accuracy than conventional linear multistep based CQBEM. However, IRK based CQBEM requires much memory and computational time. Therefore, in this research, fast multipole method (FMM) is applied to IRK based CQBEM for acceleration. The formulation of IRK based CQBEM and its acceleration by FMM for 3-D elastodynamics are presented. In addition, their accuracies are checked by solving some fundamental wave propagation problems.

    DOI： 10.11345/japannctam.62.0.172.0

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  • 3-D Numerical Simulation of Air-Coupled Ultrasonic Testing using Improved Convolution Quadrature Boundary Element Method

    Maruyama Taizo, Saitoh Takahiro, Hirose Sohichi

    NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan   62 ( 0 )   106 - 106   2013

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    Language：Japanese   Publisher：National Committee for IUTAM  

    This paper presents a 3-D numerical simulation of air-coupled ultrasonic testing. Air-coupled ultrasonic testing is known as one of non-contact ultrasonic NDE methods. However, the air-coupled ultrasonic simulation is very complicated, because the difference of acoustic impedance between air and solid is very large. In recent years, various 2-D numerical simulations have been done in order to qualify the air-coupled ultrasonic testing. However, there have not been so many 3-D simulations for air-coupled ultrasonic testing. In this research, an improved convolution quadrature 3-D BEM is developed for air-coupled ultrasonic simulation. Some numerical results are shown to validate our proposed method.

    DOI： 10.11345/japannctam.62.0.106.0

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  • Wave Propagation Analysis of Air-Coupled Ultrasonic Testing

    MARUYAMA Taizo, SAITOH Takahiro, HIROSE Sohichi

    61 ( 3 )   111 - 112   2012.3

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  • OS0715 3D Numerical Simulation for Air-Coupled Ultrasonic Testing

    MARUYAMA Taizo, SAITOH Takahiro, HIROSE Sohichi

    The Proceedings of the Materials and Mechanics Conference   2012 ( 0 )   _OS0715 - 1_-_OS0715-3_   2012

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    Language：Japanese   Publisher：The Japan Society of Mechanical Engineers  

    This paper presents a 3D numerical simulation for air-coupled ultrasonic testing. Air-coupled ultrasonic testing has some advantages because this method is one of non-contact ultrasonic NDE methods. However, the positioning of air-coupled transducers is very sensitive, because the difference of acoustic impedance between air and solid is very large. In order to use this method for evaluation of various materials, it needs to simulate wave propagation in a solid medium. A BEM (boundary element method) is an effective method for wave propagation problems. Therefore, the BEM formulation using the CQM (convolution quadrature method) is developed for air-coupled ultrasonic testing and the numerical results for 3D wave simulation are shown.

    DOI： 10.1299/jsmemm.2012._OS0715-1_

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  • 境界要素法を用いた空気超音波法の3次元波動伝搬解析

    丸山泰蔵

    平成24年度秋季講演大会講演概要集   83 - 84   2012

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Presentations

  • 波動・振動解析技術の融合による接触音響非線形問題の周波数応答解析 Invited

    丸山 泰蔵

    日本学術会議 第10回計算力学シンポジウム  2020.12 

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    Event date： 2020.12

    Language：Japanese   Presentation type：Oral presentation (invited, special)  

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  • コンクリート中の鋼材を長手方向に伝搬する弾性波のモデル化と実験的検証

    中畑和之, 和田啓志, 清水鏡介, 丸山泰蔵

    第72回構造工学シンポジウム  2026.4 

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    Event date： 2026.4

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 等方弾性体板中のガイド波の超音波ビーム送信手法

    山田純花, 丸山泰蔵, 神田昂亮

    第33回超音波による非破壊評価シンポジウム  2026.1 

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    Event date： 2026.1

    Language：Japanese   Presentation type：Poster presentation  

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  • A Highly Efficient MRCM-Based Algorithm for Dispersion Curves via Candidate-Space Preselection

    Zelin Xu, Taizo Maruyama

    2026.1 

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    Event date： 2026.1

    Language：English   Presentation type：Oral presentation (general)  

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  • 界面で屈折する超音波を利用した閉口き裂イメージングに関する基礎検討

    目﨑智大, 清水鏡介, 中畑和之, 丸山泰蔵

    第33回超音波による非破壊評価シンポジウム  2026.1 

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    Event date： 2026.1

    Language：Japanese   Presentation type：Poster presentation  

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  • 動弾性transmission問題に対するPMCHWT定式化における係数行列の数値的対称性について

    丸山泰蔵, 松本安弘

    計算数理工学シンポジウム2025  2025.12 

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    Event date： 2025.12

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Self-consistent approach to homogenization of concrete for wave propagation International conference

    Taizo Maruyama

    IEEE International Ultrasonic Symposium 2025  2025.9 

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    Event date： 2025.9

    Language：English   Presentation type：Poster presentation  

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  • Ultrasonic Guided-wave Beam Solutions and Beam Solution in Anisotropic Composite Plates International conference

    Sumika Yamada, Taizo Maruyama, Akira Furukawa

    IEEE International Ultrasonic Symposium 2025  2025.9 

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    Event date： 2025.9

    Language：English   Presentation type：Poster presentation  

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  • グリットベース領域積分方程式法を用いた面内波動散乱解析

    豊島直生, 丸山泰蔵

    第30回計算工学講演会  2025.6 

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    Event date： 2025.6

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 超音波造影剤の位置検出精度の検討

    杉田直広, 丸山泰蔵

    第30回計算工学講演会  2025.6 

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    Event date： 2025.6

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 2次元弾性波動transmission問題に対する高速直接解法

    松本安弘, 丸山泰蔵

    第28回応用力学シンポジウム  2025.5 

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    Event date： 2025.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 異方性弾性板におけるガイド波の超音波ビーム解

    山田純花, 丸山泰蔵, 古川陽

    第28回応用力学シンポジウム  2025.5 

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    Event date： 2025.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • ゲート制御レーザ超音波照射を用いたカットオフ周波数検出による残存板厚の測定

    中畑和之, 山内謙汰, 清水鏡介, 丸山泰蔵, 林高弘

    第71回構造工学シンポジウム  2025.4 

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    Event date： 2025.4

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 異方性弾性板中のガイド波の超音波ビーム解とスキュー角が及ぼす影響

    山田純花, 丸山泰蔵, 古川陽

    第32回超音波による非破壊評価シンポジウム  2025.1 

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    Event date： 2025.1

    Language：Japanese   Presentation type：Poster presentation  

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  • 伝搬モード選択的送受信手法の検討

    神田昂亮, 丸山泰蔵, 山田純花

    第32回超音波による非破壊評価シンポジウム  2025.1 

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    Event date： 2025.1

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • H行列法を用いたグリッドベース領域積分方程式法の高速化

    丸山泰蔵

    計算数理工学シンポジウム2024  2024.12 

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    Event date： 2024.12

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • proxy法による2次元動弾性層ポテンシャルの効率的低ランク近似

    松本安弘, 丸山泰蔵

    計算数理工学シンポジウム2024  2024.12 

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    Event date： 2024.12

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Modal excitation analysis for interior and surface-breaking cracks in two-dimensional half plane using boundary element and perturbation methods

    Taizo Maruyama, Naohiro Sugita

    International Mechanical Engineering Congress & Exposition (IMECE)  2024.11 

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    Event date： 2024.11

    Language：English   Presentation type：Oral presentation (general)  

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  • Influence of skew angle on ultrasonic guided-wave beam solutions in anisotropic composite plates

    Sumika Yamada, Taizo Maruyama, Akira Furukawa

    International Mechanical Engineering Congress & Exposition (IMECE)  2024.11 

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    Event date： 2024.11

    Language：English   Presentation type：Poster presentation  

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  • 波動伝搬に対するself-consistent methodを用いた数値均質化の基礎的検討

    丸山泰蔵, 生子花

    日本応用数理学会2024年度年会  2024.9 

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    Event date： 2024.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Excitation analysis for scatterers in an open domain using boundary element and perturbation methods

    Taizo Maruyama, Naohiro Sugita

    26th International Congress of Theoretical and Applied Mechanics  2024.8 

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    Event date： 2024.8

    Language：English   Presentation type：Oral presentation (general)  

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  • Modal excitation for open domain using boundary element and perturbation methods

    Taizo Maruyama, Naohiro Sugita

    WAVES 2024 16th International Conference on Mathematical and Numerical Aspects of Wave Propagation  2024.7 

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    Event date： 2024.6 - 2024.7

    Language：English   Presentation type：Oral presentation (general)  

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  • 気泡力学を考慮した超音波造影剤の散乱シミュレーション

    杉田直広, 丸山泰蔵, An Junseok, 進士忠彦

    第29回計算工学講演会  2024.6 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 有限幅の板におけるガイド波ビーム散乱問題に対するハイブリッドBEMの検討

    山田純花, 丸山泰蔵, 神田昂亮

    第29回計算工学講演会  2024.6 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 境界要素法とEffective Field Methodを用いた非均質材料中の波動伝搬モデル構築の基礎的検討

    丸山泰蔵, 生子花

    第29回計算工学講演会  2024.6 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 半解析的有限要素法とNumerical Continuation Methodによるガイド波分散曲線の追跡

    丸山泰蔵, 中畑和之

    第27回応用力学シンポジウム  2024.5 

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    Event date： 2024.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 先進的超音波非破壊検査への境界要素法の応用例 Invited

    丸山泰蔵

    「境界要素法」講習会, 土木学会応用力学委員会「計算力学×アルファ小員会」主催  2024.3 

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    Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

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  • コンクリート材料中の波動伝搬モデル構築のための均質化法の基礎的検討

    生子花, 丸山泰蔵

    第31回超音波による非破壊評価シンポジウム  2024.1 

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    Event date： 2024.1

    Language：Japanese   Presentation type：Poster presentation  

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  • Scattering analysis of guided wave beam by defects in a plate with finite width Invited

    Taizo Maruyama

    RIMS共同研究（公開型）, 非適切問題に対する諸アプローチ-理論と実践-  2024.1 

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    Event date： 2024.1

    Language：English   Presentation type：Oral presentation (invited, special)  

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  • 境界要素法と摂動法を用いた開領域の固有周波数の加振問題への応用

    丸山泰蔵, 杉田直広

    計算数理工学シンポジウム2023  2023.11 

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    Event date： 2023.11

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 部分閉口き裂面で発生する屈折超音波のモデル化

    中畑和之, 小野寺慧, 丸山泰蔵

    USE2023 第44回超音波エレクトロニクスの基礎と応用に関するシンポジウム  2023.11 

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    Event date： 2023.11

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  • Three-dimensional hybrid SAFE-BEM for elastic guided wave scattering in a plate with finite width

    Taizo Maruyama, Kosuke Kanda

    The 7th Asia-Pacific International Conference on Computational Methods in Engineering (ICOME 2023)  2023.11 

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    Event date： 2023.11

    Language：English   Presentation type：Oral presentation (general)  

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  • 部分閉口き裂で屈折する超音波のモデル化に関する基礎的検討

    中畑和之, 小野寺慧, 丸山泰蔵

    日本非破壊検査協会2023年度秋季講演大会  2023.10 

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    Event date： 2023.10

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Beam Solutions for Elastic Guided Waves in Plates

    Taizo Maruyama, Kosuke Kanda

    JSNDI fall conference 2023  2023.10 

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    Event date： 2023.10

    Language：English   Presentation type：Oral presentation (general)  

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  • A numerical study on the relationship between local defect resonance and sub-harmonic resonance for closed cracks

    Taizo Maruyama, Tomoki Tanihira, Kazuyuki Nakahata

    2023 International Congress on Ultrasonics  2023.9 

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    Event date： 2023.9

    Language：English   Presentation type：Oral presentation (general)  

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  • 3D測量データと物理シミュレーションの融合に関する基礎検討

    中畑和之, 丸山泰蔵, 田村健悟, 矢田貝果那

    令和5年度土木学会全国大会第78回年次学術講演会  2023.9 

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    Event date： 2023.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • レーザ照射による弾性波の発生と周波数制御に関する基礎検討

    山内謙汰, 中村蒼嗣, 丸山泰蔵, 中畑和之, 林高弘

    令和5年度土木学会全国大会第78回年次学術講演会  2023.9 

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    Event date： 2023.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 光音響法によるひび割れを有するコンクリート表面の弾性波可視化

    朝日快佳, 大河内健人, 丸山泰蔵, 中畑和之, 永井政貴, 林山

    令和5年度土木学会全国大会第78回年次学術講演会  2023.9 

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    Event date： 2023.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • ハイブリッドSAFE-BEMを用いたガイド波散乱解析の定式化の検討

    丸山泰蔵, 神田昂亮

    第28回計算工学講演会  2023.5 

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    Event date： 2023.5 - 2023.6

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 水道管の漏水位置推定のための時間反転イメージングの基礎的検討

    丸山泰蔵, 和田啓志, 中畑和之

    第28回計算工学講演会  2023.5 

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    Event date： 2023.5 - 2023.6

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • ハイブリッド有限要素法を用いた上水道管接合部でのガイド波の反射・透過解析

    松尾太聖, 丸山泰蔵, 中畑 和之

    第26回応用力学シンポジウム  2023.5 

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    Event date： 2023.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 局所欠陥共振の数値モデリングに関する基礎的検討

    谷平智紀, 小野寺慧, 丸山泰蔵, 中畑和之

    情報・知能・精密機器部門講演会 IIP2023  2023.3 

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    Event date： 2023.3

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 数値モデルを援用した上水道管の漏水位置のガイド波検査の検討

    和田啓志, 丸山泰蔵, 中畑 和之

    情報・知能・精密機器部門講演会 IIP2023  2023.3 

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    Event date： 2023.3

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 上水道管接合部での超音波の反射・透過に対するハイブリッドSAFE-FE解析

    松尾太聖, 丸山泰蔵, 中畑和之

    第30回超音波による非破壊評価シンポジウム  2023.1 

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    Event date： 2023.1

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • ゲート制御レーザー発振による低周波超音波の発生に関する基礎的検討

    中村蒼嗣, 山内謙汰, 丸山泰蔵, 中畑和之, 林高弘

    第30回超音波による非破壊評価シンポジウム  2023.1 

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    Event date： 2023.1

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • DISPERSION ANALYSIS OF GUIDED WAVES IN A WATER PIPE BURIED IN THE GROUND USING SEMI-ANALYTICAL FINITE ELEMENT METHOD

    Taizo MARUYAMA, Kazuyuki NAKAHATA

    JASCOME symposium 2022  2022.12 

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    Event date： 2022.12

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • EXPERIMENTAL STUDY OF ULTRASONIC IMAGING USING MULTI-FREQUENCY MUSIC METHOD

    Taisei MATSUO, Taizo MARUYAMA, Kazuyuki NAKAHATA

    JASCOME symposium 2022  2022.12 

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    Event date： 2022.12

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 非線形波動解析のためのEFITの適用に関する検討

    朝日快佳, 丸山泰蔵, 中畑 和之

    令和4年度土木学会全国大会第77回年次学術講演会 

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    Event date： 2022.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 振動による疲労き裂の開閉口が超音波透過波形に及ぼす影響の測定

    川﨑藍流, 小野寺慧, 丸山泰蔵, 中畑和之

    令和4年度土木学会全国大会第77回年次学術講演会 

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    Event date： 2022.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 橋梁のデジタルツインの作成と全視野振動測定による検証

    田村健悟, 丸山泰蔵, 中畑和之, 島崎航平, 石井抱

    令和4年度土木学会全国大会第77回年次学術講演会 

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    Event date： 2022.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 水道管を伝搬するガイド波の計測と波動分散に関する検討

    浦道将, 丸山泰蔵, 中畑 和之

    令和4年度土木学会全国大会第77回年次学術講演会 

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    Event date： 2022.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • トポロジー導関数を用いた超音波イメージングの実験的検証

    中畑和之, 中村悠人, 丸山泰蔵, 斎藤隆泰

    日本機械学会2022年度年次大会 

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    Event date： 2022.9

    Language：Japanese   Presentation type：Poster presentation  

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  • 光音響イメージングのためのマトリクスアレイプローブの適用に関する研究

    廣瀬悠人, 三木陽大, 丸山泰蔵, 中畑和之

    日本機械学会2022年度年次大会 

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    Event date： 2022.9

    Language：Japanese   Presentation type：Poster presentation  

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  • Numerical Continuation and Semi-analytical Finite Element Method for Guided Wave Dispersion Analysis

    Taizo Maruyama, Kazuyuki Nakahata

    15th World Confress on Computational Mechanics & 8th Asian Pacific Congress on Computational Mechanics (WCCM-APCOM) 

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    Event date： 2022.7 - 2022.8

    Language：English   Presentation type：Oral presentation (general)  

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  • 動弾性・音響有限積分法によるレーザー超音波法の数値シミュレーション

    三木陽大, 丸山泰蔵, 中畑和之

    第29回超音波による非破壊評価シンポジウム  2022.1 

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    Event date： 2022.1

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • データ同化を利用したアダプティブFSAPの精度向上に関する検討

    齋藤泰彦, 林恭平, 丸山泰蔵, 中畑和之

    第29回超音波による非破壊評価シンポジウム  2022.1 

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    Event date： 2022.1

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 連続法を用いたガイド波の伝搬モードの追跡解析

    中畑和之, 浜田眞克, 丸山泰蔵

    日本非破壊検査協会2021年度秋季講演大会 

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    Event date： 2021.11

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • トポロジー感度に基づいた超音波イメージングの基礎的検討

    丸山泰蔵, 片桐凛久, 中畑和之, 斎藤隆泰

    日本非破壊検査協会2021年度秋季講演大会 

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    Event date： 2021.11

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 超音波アレイ探触子を用いたアスファルト舗装内部の映像化

    中畑和之, 丸山泰蔵, 武藤健太, 橋爪謙治

    令和3年度全国大会第76回年次学術講演会 

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    Event date： 2021.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 非線形振動を利用した閉口き裂の評価に関する基礎的研究

    小野寺慧, 川崎藍流, 丸山泰蔵, 中畑和之

    令和3年度全国大会第76回年次学術講演会 

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    Event date： 2021.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 複数周波数を用いたMUSIC法の超音波イメージングへの応用に関する研究

    松尾太聖, 丸山泰蔵, 中畑和之

    日本機械学会2021年度年次大会 

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    Event date： 2021.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 膜部材中を伝搬する波動と振動に関する実験的検討

    中村蒼嗣, 丸山泰蔵, 中畑和之

    日本機械学会2021年度年次大会 

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    Event date： 2021.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 3-D steady-state wave scattering by a crack with contact acoustic nonlinearity Invited

    Taizo Maruyama, Kazuyuki Nakahata

    IUTAM symposium 

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    Event date： 2021.6 - 2021.7

    Language：English   Presentation type：Oral presentation (general)  

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  • A numerical continuation approach to semi-analytical finite element system for dispersion curve calculation Invited

    Kazuyuki Nakahata, Taizo Maruyama

    IUTAM symposium 

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    Event date： 2021.6 - 2021.7

    Language：English   Presentation type：Oral presentation (general)  

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  • 複数の周波数を利用したMUSIC 法による超音波イメージングの基礎的検討

    松尾太聖, 丸山泰蔵, 中畑和之

    令和3年度土木学会四国支部第27回技術研究発表  2021.5 

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    Event date： 2021.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 非線形振動を利用した疲労き裂の評価に関する基礎的研究

    小野寺慧, 川崎藍流, 丸山泰蔵, 中畑和之

    令和3年度土木学会四国支部第27回技術研究発表会  2021.5 

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    Event date： 2021.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 膜材料の波動伝搬と振動に関する実験的検討

    中村蒼嗣, 丸山泰蔵, 牧田陽行, 中畑和之

    令和3年度土木学会四国支部第27回技術研究発表会  2021.5 

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    Event date： 2021.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 粒子フィルタを用いたスリットの長さと傾きの推定

    大川瑞貴, 丸山泰蔵, 中畑和之

    第28回超音波による非破壊評価シンポジウム 

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    Event date： 2021.1

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • MUSIC法によるアレイ超音波イメージングの基礎的検討

    松尾太聖, 丸山泰蔵, 中畑和之

    第28回超音波による非破壊評価シンポジウム 

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    Event date： 2021.1

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • SAFEを用いた水道管を伝搬するガイド波の分散解析

    浜田眞克, 丸山泰蔵, 中畑和之

    第28回超音波による非破壊評価シンポジウム 

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    Event date： 2021.1

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 機械学習による画像生成アルゴリズムを用いたアダプティブFSAP方式の高精度化の試み

    都築幸乃, 牧田陽行, 林恭平, 丸山泰蔵, 中畑和之

    第28回超音波による非破壊評価シンポジウム 

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    Event date： 2021.1

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Lamb波の分散挙動に有限周波数帯域を持つ波束が及ぼす影響

    神田昂亮, 丸山泰蔵

    日本非破壊検査協会2020年度秋季講演大会  2020.10 

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    Event date： 2020.10

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 閉口き裂による散乱問題に対する調和バランス-境界要素法へのH行列法の適用

    丸山泰蔵

    第23回土木学会応用力学シンポジウム  2020.5 

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    Event date： 2020.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • ２次元半無限弾性体中の表面き裂による非線形超音波発生現象の定常解析

    丸山泰蔵

    第27回超音波による非破壊評価シンポジウム 

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    Event date： 2020.1

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • Steady-state wave scattering by a surface breaking crack with contact acoustic nonlinearity in an elastic half-plane using harmonic balance-boundary element method

    Taizo Maruyama, Terumi Touhei

    7th Asian Pacific Congress on Computational Mechanic (APCOM 2019) 

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    Event date： 2019.12

    Language：English   Presentation type：Oral presentation (general)  

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  • 非線形境界条件を有する界面での平面波の反射・透過問題の調和バランス法による解析

    米永佳祐, 丸山泰蔵, 東平光生

    第74回土木学会学術年次講演会  2019.9 

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    Event date： 2019.9

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • A Continuation Approach to Boundary Integral Equation for Steady-state Wave Scattering by a Crack with Contact Acoustic Nonlinearity

    Taizo Maruyama, Terumi Touhei

    14th International Conference on Mathematical and Numerical Aspects of Wave Propagation (WAVES2019) 

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    Event date： 2019.8

    Language：English   Presentation type：Oral presentation (general)  

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  • 2次元半無限弾性体中の接触音響非線形性を伴う表面き裂による散乱問題のための調和バランス-境界要素法

    丸山泰蔵, 東平光生

    第65回理論応用力学講演会・第22回土木学会応用力学シンポジウム 

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    Event date： 2019.6

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 半無限弾性体中の接触条件を有する表面き裂による散乱問題のための調和バランス-境界要素法

    丸山泰蔵, 東平光生

    第24回計算工学講演会 

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    Event date： 2019.5

    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 複数周波数のMUSIC法を用いた超音波イメージングの実験的検討

    松尾太聖, 温品晴貴, 丸山泰蔵, 中畑和之

    第25回応用力学シンポジウム  2022.5 

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  • 固体へのレーザー照射による弾性波の発生とその波形特性について

    山内謙汰, 丸山泰蔵, 中畑和之

    令和4年度土木学会四国支部第28回技術研究発表会  2022.5 

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  • 幾何学的非線形性を考慮したEFITによる弾性波解析の基礎的検討

    朝日快佳, 丸山泰蔵, 中畑和之

    令和4年度土木学会四国支部第28回技術研究発表会  2022.5 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 光音響法によるコンクリート中を伝搬する超音波の可視化について

    大河内健人, 武藤健太, 丸山泰蔵, 中畑和之

    令和4年度土木学会四国支部第28回技術研究発表会  2022.5 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 橋梁のデジタルツインの作成と振動測定による検証

    田村健悟, 丸山泰蔵, 中畑和之

    令和4年度土木学会四国支部第28回技術研究発表会  2022.5 

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    Language：Japanese   Presentation type：Oral presentation (general)  

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  • 時間周波数解析を用いた水道管を伝搬するガイド波の群速度推定

    川瀬寛己, 浦道将, 丸山泰蔵, 中畑和之

    令和4年度土木学会四国支部第28回技術研究発表会  2022.5 

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  • 振動時の疲労き裂の開閉口に伴う超音波透過波形の動的変化について

    川﨑藍流, 小野寺慧, 丸山泰蔵, 中畑和之

    令和4年度土木学会四国支部第28回技術研究発表会  2022.5 

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  • 水道管を伝搬するガイド波に対する相反定理を利用した分散関係の計測

    浦道将, 丸山泰蔵, 中畑和之

    令和4年度土木学会四国支部第28回技術研究発表会  2022.5 

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  • MUSICを用いた超音波非破壊イメージングの基礎的検討

    松尾太聖, 丸山泰蔵, 中畑和之

    令和2年度土木学会四国支部第26回技術研究発表会  2020 

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  • 疲労き裂面の接触状態による超音波透過特性に関する基礎的検討

    川﨑藍流, 丸山泰蔵, 勝田順一, 高橋学, 中畑和之

    令和2年度土木学会四国支部第26回技術研究発表会  2020 

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Awards

  • Challenging Research Award

    2024.9   Tokyo Institute of Technology   Development of wave propagation model in concrete

    Taizo Maruyama

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  • Applied Mechanics Best Paper Award

    2019.6   JSCE Applied Mechanics Committee   On stability of steady-state solutions by harmonic balance-boundary element method for scattering problems by a crack with contact acoustic nonlinearity

    Taizo Maruyama, Terumi Touhei

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  • Kikkawa Yamagichi Award

    2017.7   Fast time-domain boundary element method and its application to nonlinear ultrasonic simulation

    Taizo Maruyama

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  • Applied Mechanics Encouragement Award

    2016.5   JSCE Applied Mechanics Committee   2-D simulation of sub-harmonic generation due to cracks with contact-boundary conditions

    Taizo Maruyama

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  • Best Research Poster

    2024.11   The American Society of Mechanical Engineers (ASME)   Influence of skew angle on ultrasonic guided-wave beam solutions in anisotropic composite plates

    Sumika Yamada, Taizo Maruyama, Akira Furukawa

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  • Presentation Award

    2018.9   JSCE Applied Mechanics Committee   On stability of steady-state solutions by harmonic balance-boundary element method for scattering problems by a crack with contact acoustic nonlinearity

    Taizo Maruyama

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  • Presentation Award

    2015.1   JASCOME   Implicit Runge-Kutta based CQ-FMBEM for coupled acoustic-elastic wave problems

    Taizo Maruyama

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  • Presentation Award

    2013.11   JSCE  

    Taizo Maruyama

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  • Presentation Award

    2013.3  

    Taizo Maruyama

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Research Projects

  • NDE4.0加速のための高性能波動解析・逆解析手法の開発 (jh250070)

    Grant number：jh250070  2025.4 - 2026.3

    学際大規模情報基盤共同利用・共同研究拠点  公募型共同研究 

    斎藤隆泰, 丸山泰蔵, 深沢圭一郎, 中畑和之, 岩下武史, 松本安弘

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  • 非局所理論の非破壊評価への展開

    Grant number：24K00966  2024.4 - 2028.3

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    斎藤 隆泰, 丸山泰蔵

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    Authorship：Coinvestigator(s) 

    Grant amount：\18330000 （ Direct Cost: \14100000 、 Indirect Cost：\4230000 ）

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  • NDE4.0加速のための高性能波動解析・逆解析手法の開発

    Grant number：jh240035  2024.4 - 2025.3

    学際大規模情報基盤共同利用・共同研究拠点  公募型共同研究 

    斎藤隆泰, 丸山泰蔵, 深沢圭一郎, 中畑和之, 岩下武史, 松本安弘

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  • ガイド波を用いた上水道管の漏水検知・位置推定技術の開発

    Grant number：22K14318  2022.4 - 2025.3

    日本学術振興会  科学研究費助成事業 若手研究  若手研究

    丸山 泰蔵

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    Grant amount：\4680000 （ Direct Cost: \3600000 、 Indirect Cost：\1080000 ）

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  • Fundamental examination for leakage detection of water supply pipe using guided waves

    2021.4 - 2022.3

    Taizo Maruyama

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    Authorship：Principal investigator 

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  • 反発度を用いたコンクリート内部損傷有無の推定手法の開発

    2021.4 - 2022.3

    一般社団法人 四国クリエイト協会  2021年度第25回「建設事業に関する技術開発・調査研究」支援事業 

    丸山 泰蔵

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    Authorship：Principal investigator 

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  • 高度波動解析のための数学モデルの開発と工学への応用

    Grant number：JPJSBP1-20207707  2020.7 - 2022.6

    日本学術振興会  二国間交流事業共同研究 

    廣瀬 壮一, 斎藤 隆泰, 古川 陽, 丸山 泰蔵, Bui Tinh, Wongthongsiri Supawa, Tomar Sushil Kumar, Dilbag Singh, Aarti Khurana, Ashish Kumar

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  • Study on wave propagation in a soft and thin material and its application to nondestructive evaluation

    Grant number：20K21022  2020.7 - 2022.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)  Grant-in-Aid for Challenging Research (Exploratory)

    Nakahata Kazuyuki

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    Authorship：Coinvestigator(s) 

    Grant amount：\6370000 （ Direct Cost: \4900000 、 Indirect Cost：\1470000 ）

    Soft and thin materials are used in various industrial fields, but they are deteriorated due to external impact or environmental factors. In this study, we consider the application of elastic waves and vibrations for a non-destructive inspection of structural components using soft and thin materials. In experimental measurements, it was shown that the natural frequency and the propagation velocity of the vibration change depending on the tensile stress state acting on the film. The results are in good agreement with the theoretical approach based on the string vibration. Moreover, a wave with a small amplitude was found, which arrived earlier than the vibration propagation. It seems to be a guided wave propagating in the membrane; therefore, we continue the investigation of the property of the wave.

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  • Build and development of smart ultrasonic nondestructive evaluation

    Grant number：20H02230  2020.4 - 2023.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

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    Authorship：Coinvestigator(s) 

    Grant amount：\17550000 （ Direct Cost: \13500000 、 Indirect Cost：\4050000 ）

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  • Advanced steady-state scattering analysis for nonlinear ultrasonic testing based on contact of crack faces

    Grant number：19K15077  2019.4 - 2022.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists  Grant-in-Aid for Early-Career Scientists

    Maruyama Taizo

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    Grant amount：\1820000 （ Direct Cost: \1400000 、 Indirect Cost：\420000 ）

    In this study, we improved a numerical method for nondestructive evaluation for cracks in structures and machines. Specifically, we extended a harmonic balance-boundary element method (HB-BEM) into wave scattering by 2-D surface cracks and 3-D interior cracks to solve realistic problems. Furthermore, the H-matrix method was applied to the HB-BEM to solve large-scale problems.

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  • Quantitative evaluation of subharmonic generation due to contact of crack faces using nonlinear steady-state vibration analysis

    Grant number：16H07235  2016.8 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Research Activity start-up  Grant-in-Aid for Research Activity start-up

    Maruyama Taizo

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    Grant amount：\2470000 （ Direct Cost: \1900000 、 Indirect Cost：\570000 ）

    This study dealt with nonlinear ultrasonic testing, which is one of the nondestructive techniques for structures and machines. A novel numerical method was developed to investigate the received wave with 1/2 frequency component of the incident wave in the nonlinear ultrasonic testing. In the numerical simulation, complex resonance was confirmed under certain conditions. This phenomenon is called the subharmonic resonance and was caused by the interaction between fluctuation of resonance characteristic and contact of crack faces. It was indicated that the the scattered wave with 1/2 frequency component is generated in the nonlinear ultrasonic testing as a result of the subharmonic resonance.

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  • 大規模波動解析手法の開発及びコンクリート材料に対する非破壊検査への応用

    Grant number：14J10235  2014.4 - 2016.3

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    丸山 泰蔵

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    Grant amount：\1900000 （ Direct Cost: \1900000 ）

    平成27年度は，閉口き裂に対する検出手法である非線形超音波法に対する基礎的なアプローチとして，数値シミュレーションによる分調波発生現象の再現，及びその原因の考察を行う予定であった．また，境界要素法・有限要素法結合解法の開発を行い，非線形超音波法の非均質材料へのアプローチを見通しの良いものにする予定であった．
    分調波シミュレーションに関しては，平成26年度中に2次元時間領域境界要素法を用いた数値シミュレーションによって材料内部のき裂に対する分調波発生現象の再現に成功したため，平成27年度はその数値シミュレーション手法を材料表面に存在するき裂に対して拡張すること，及び3次元数値シミュレーションの実行を予定していた．成果としては，先行研究の計測実験において分調波発生現象が報告されている材料表面に存在するき裂に対して数値シミュレーション手法を拡張した．その後，数値シミュレーションを実行し，表面き裂による分調波発生現象の再現に成功した．また，その数値シミュレーションから，自由表面による弾性波の反射とき裂面の接触との相互作用によって，分調波発生現象が起こっていることを示唆する結果が得られた．さらに，平成26年度に行った3次元時間領域境界要素法の高速・効率化の成果を元に，非線形超音波法の数値シミュレーション手法を3次元へと拡張し，材料内部のき裂に対して解析を行った．その結果，有限の奥行き長さを有する2次元の場合と似た形状のき裂モデルに対して，分調波の発生が確認できた．また，奥行き長さが分調波発生現象に与える影響を調べた．
    非均質材料へのアプローチである境界要素法・有限要素法結合解法の開発に関しては，2次元波動問題に対してGalerkin法を用いた定式化を行い，数値シミュレーションを実行することによって，その妥当性を検証した．

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