研究者詳細 - 木本　和志

論文 - 木本　和志

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A Green's function boundary element method for SH-wave scattering in an elastic layer

K Kimoto, S Hirose

REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 23A AND 23B 23 ( A ) 118 - 125 2004年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：AMER INST PHYSICS

This paper concerns a boundary element method (BEM) for 2D SH-wave scattering in an elastic layer sandwiched by two half spaces. The BEM is based on the integral equation having a Green's function for a layer as its integral kernel. Since the Green's function satisfies the interface conditions, numerical integration in the BEM is necessary only on the surface of scattering objects, thus the computational memory can be saved greatly. On the other hand, numerical evaluation of the Green's function is critical and burdensome. In this paper, a hybrid ray-mode representation of the Green's function given by Kamel [2] is employed. Numerical aspects of the representation are discussed in some detail, and the BEM code with the Green's function is developed thereafter. As a numerical example, SH-wave scattering by a cavity in a layer is considered. Some numerical results to investigate the interaction between the cavity and layer interfaces are presented.

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Flaw shape reconstruction from SH-wave array ultrasonic data using time domain linearized inverse scatering method

Review of Progress in Quantitative Nondestructive Evaluation 24 ( A ) 828 - 835 2004年

数値シミュレーションを用いた開口合成法の欠陥形状再構成能に関する研究査読

木本和志, 松江剛士, 廣瀬壮一

応用力学論文集 7 ( 1 ) 91 - 96 2004年

入射場の放射パターンを用いるリニアアレイ探触子の設計変数決定法査読

藤原昌之, 木本和志, 廣瀬壮一

応用力学論文集 6 1089 - 1096 2003年

層状体に対するSH波のグリーン関数を用いた境界要素法査読

境界要素法論文集 20 41 - 48 2003年

A coupling method of boundary element method and generalized ray theory for elastic wave scattering in a thick plate

K Kimoto, S Hirose

REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 22A AND 22B 20 ( A ) 41 - 48 2003年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：AMER INST PHYSICS

This paper presents a method for 3D elastic wave scattering analysis by an obstacle in a thick plate. The method is a coupling method of the boundary element method (BEM) and the generalized ray theory (GRT). For computational efficiency, the free field displacement in a plate is calculated by the GRT, and the solution is used as an incident field in the successive BEM analysis. The displacements or the tractions on the surface of the scattering object are obtained by the BEM. The boundary values obtained thus are then substituted into the integral expression of the scattered waves, in which the Green's functions are evaluated by the GRT to reduce computational cost further. As a numerical example, the scattering by a spherical cavity embedded in a plate is solved. The numerical results are shown for displacement waveforms as a function of time at points on the cavity and plate surface. Through the numerical example, benefit of the proposed method is discussed.

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Inversion of Vibration Mode of an Immersion Ultrasonic Transducer 査読

S. Hirose, K. Kimoto, H. Mizushima

Inverse Problems in Engineering Mechanics III 127 - 136 2002年

A numerical modeling of contact SH-wave transducers

K Kimoto, S Hirose

REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 20A AND 20B 557 ( A ) 821 - 828 2001年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：AMER INST PHYSICS

This paper discusses a numerical modeling of contact SH-wave transducers in conjunction with a BEM-based simulation technique for an ultrasonic testing. In the modeling, transmitters are modeled as distributed traction on the area of contact and receivers as a weight function to emulate averaging effect due to finite dimensions of receivers. The whole testing system is firstly formulated as an integral equation that involves the traction and the weight function. Using the integral equation, those unknown functions are then estimated from experimental data. In the last part of this paper, to examine validity of our modeling approach a numerical simulation of a pulse echo test is carried out and results are compared with experiments.

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Reflection and scattering analysis of SH-wave using a combined method of BEM and ray theory

Review of Progress in Quantitative Nondestructive Evaluation 19A 65 - 72 1999年

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