Development of simulator of ultrasonic waves in inhomogeneous and anisotropic body

非均匀各向异性体超声波模拟器的研制

• 批准号: 13555128
• 负责人: HIROSE Sohichi
• 金额: $ 2.75万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13555128/
• 关键词: ultrasonic nondestructive testing; boundary element method; Gaussian beam theory anisotropic elastic solid; fast multipole BEM; linearized inverse scattering analysis; high performance steel; SAFT; 開口合成法; 非均質異方性弾性体; マルチガウシアンビーム; 多重極境界法; 斜角探触子 /

This research project aims at developing a numerical simulation tool of ultrasonic waves for accurate and efficient ultrasonic nondestructive evaluation of an inhomogeneous and anisotropic elastic solid. In simulation of ultrasonic waves, the numerical method has to be designed taking account of the following advantages; high accuracy and efficient computational cost, being capable of arbitrary shaped defects and outer boundaries, and mathematical modeling of all wave processes from transmission to receipt in ultrasonic testing. Using numerical data in simulation, an inverse analysis method also needs to be developed for visualization of defect shapes. For these purposes, intensive research has been done for the following subjects.1.Improvement of programming code of boundary element analysis for inhomogeneous and anisotropic elastic solid.A BEM code for scattering analysis of elastic waves in anisotropic elastic solid has been improved by carrying out the integration scheme more efficiently and using far-field expressions. Also a fast multiple boundary element nethod has been developed.2.Modeling of ultrasonic testing and development of combined method of BEM and ray theoryUltrasonic testing has been modeled by individual wave processes based on the time invariant linear system. For scattering process which is one of wave processes in ultrasonic testing, a combined method of BEM and Gaussian beam theory has been developed.3.Inverse scattering analysis in anisotropic solid.Linearized inverse scattering analysis has been developed for ultrasonic waves in anisotropic elastic solid and its applicability has been discussed.4.Ultrasonic testing for anisotropic elastic solid.Ultrasonic testing for high performance steel has been done to investigate the effect of acoustically anisotropic property on ultrasonic waves in steel.

该研究项目旨在开发一种超声波数值模拟工具，用于对非均匀、各向异性弹性固体进行精确、高效的超声无损评估。在超声波模拟中，数值方法的设计必须考虑以下优点；高精度和高效的计算成本，能够处理任意形状的缺陷和外部边界，并对超声波检测中从传输到接收的所有波过程进行数学建模。在模拟中使用数值数据，还需要开发逆分析方法来可视化缺陷形状。为此，本文进行了以下几方面的深入研究：1.非均匀各向异性弹性固体边界元分析程序代码的改进。改进了各向异性弹性固体中弹性波散射分析的BEM代码积分方案更有效并使用远场表达式。并提出了一种快速的多边界元方法。2.超声检测建模及边界元法与射线理论相结合的方法的发展超声检测采用基于时不变线性系统的单个波过程进行建模。针对超声检测中波过程之一的散射过程，提出了边界元法与高斯束理论相结合的方法。3.各向异性固体中的逆散射分析。针对超声波在各向异性弹性固体中的线性逆散射分析，提出了线性化逆散射分析方法。 4、弹性固体各向异性超声检测。对高性能钢进行了超声检测，研究了钢中声学各向异性对超声波的影响。

项目成果

S.Hirose, Ch.Zhang, C.-Y.Wang: "A comparative study on two time-domain BEM/BIEM for transient dynamic crack analysis of anisotropic solids"Proc. of International Conference on Boundary Element Techniques. (2002)

S.Hirose，Ch.Zhang，C.-Y.Wang：“用于各向异性固体瞬态动态裂纹分析的两种时域 BEM/BIEM 的比较研究”Proc。

S.Hirose: "A review of ultrasonic nondestructive testing for structural materials"Proc.of the Symposium on Environmental Issues Related to Infrastructure Development (JSPS Symposium 2003). 497-506 (2003)

S.Hirose：“结构材料超声波无损检测综述”基础设施发展相关环境问题研讨会（JSPS 研讨会 2003）的会议记录。

K.Nakabata, S.Hirose: "Simulation of scattered wave for angle beam ultrasonic testing"J. Japanese Soc. for Non-destructive Inspection (in Japanese). (submitted).

K.Nakabata，S.Hirose：“角束超声检测的散射波模拟”J。

A.T.Tan, S.Hirose: "Two-dimensional Boundary Element Method for Elastic Wave Propagation in an Anisotropic Solid with Cracks"Proc.of ICOME2003 (1st Asia-Pacific International Conference on Computational Methods in Engineering 2003). (in print). (2004)

A.T.Tan，S.Hirose：“带有裂纹的各向异性固体中弹性波传播的二维边界元方法”Proc.of ICOME2003（第一届亚太工程计算方法国际会议，2003 年）。

T.Saitoh, A.Gunawan, S.Hirose: "Application of fast multipole boundary element method to scattering analysis of SH waves by a lap joint"Review of Progress in Quantitative Nondestructive Evaluation. 22. 1103-1110 (2003)

T.Saitoh、A.Gunawan、S.Hirose：“快速多极边界元法在搭接接头 SH 波散射分析中的应用”定量无损评估进展回顾。