Research on nondestructive evaluation of inhomogeneous and anisotropic materials using highly accurate ultrasonic measurement

高精度超声波测量非均匀各向异性材料无损评价研究

• 批准号: 15360234
• 负责人: HIROSE Sohichi
• 金额: $ 9.47万
• 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: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15360234/
• 关键词: ultrasonic nondestructive testing; boundary element method; multiple scattering; scattering analysis; measurement; masterial evaluation; simulation; imaging; 非均質異方性材料; 表面波; 速度分散性; 2.5次元境界要素法; アレイ探傷; 開口合成法; 時間反転集束; マッチドパルス; 非線形最小二乗法; 位相速度曲

In the present research, for the purpose of improving accuracy and reliability of ultrasonic nondestructive testing, fundamental characteristics of ultrasonic waves in inhomogeneous and/or anisotropic elastic solids are numerically analyzed, and material properties and defects in inhomogeneous and anisotropic solids are nondestructively evaluated by means of ultrasonic measurement with high accuracy.In numerical research of ultrasonic waves in solids, the following analyses were carried out ; 1. Boundary element analysis of scattering problems in anisotropic elastic solids, 2. Analysis of 3D scattering field by side-drilled hole and slit with uniform cross-section, 3. Multiple scattering analysis of elastic waves using fast multipole boundary element method, 4. Ultrasonic noise analysis by using multiple scattering approximation, and 5. Dispersion analysis of surface waves in a layered elastic solid.In the items 1 and 2, the boundary element methods with relevant fundamental solutions … More to concerned problems were developed and the items 3 and 4 are related to the multiple scattering analysis of a lot of inclusions in materials, which are numerical models for filaments of composite materials and grain boundaries in metals. In the item 5, the effect of an imperfect interface, on dispersive properties of time-harmonic extensional surface wave propagation in a pre-stressed symmetric layered composite was considered. These numerical analyses provided fundamental and valuable data for quantitative ultrasonic testing.In the researches of material evaluation, material damping of concrete was obtained, taking account of the energy loss in ultrasonic transducers and wave profiles, and a new optimal waveform, called matched pulse, in ultrasonic testing for concrete was proposed. Also inhomogeneity and anisotropy in steel plate were nondestructively evaluated by measuring leaky surface waves. In ultrasonic evaluation of defects, defect echoes were numerically simulated by means of multi-Gaussian beam method and 2.5D boundary element method, and some defect imaging methods like time reversal focusing and TDTG were applied to the ultrasonic array data. Less

本研究以提高超声无损检测的准确性和可靠性为目的，对非均匀和/或各向异性弹性固体中超声波的基本特性进行数值分析，并通过各种手段对非均匀和各向异性固体中的材料性能和缺陷进行无损评估。在固体中超声波的数值研究中，进行了以下分析： 1.各向异性散射问题的边界元分析；弹性固体，2. 通过具有均匀横截面的侧钻孔和狭缝进行 3D 散射场分析，3. 使用快速多极边界元法对弹性波进行多重散射分析，4. 使用多重散射近似进行超声噪声分析，以及5. 层状弹性固体中表面波的频散分析。在第1项和第2项中，开发了边界元方法以及相关问题的基本解决方案，并提出了第3项和第3项第4项涉及材料中大量夹杂物的多重散射分析，是复合材料细丝和金属晶界的数值模型。第5项是不完美界面对时谐色散特性的影响。考虑了预应力对称层状复合材料中的拉伸表面波传播，这些数值分析为定量超声测试提供了基础且有价值的数据。在材料评估研究中，考虑了能量，获得了混凝土的材料阻尼。提出了一种新的最佳波形，称为匹配脉冲，用于混凝土超声检测，并通过测量泄漏表面波、缺陷回波来无损评估钢板中的不均匀性和各向异性。采用多高斯光束法和2.5维边界元法进行数值模拟，并应用时间反转聚焦、TDTG等缺陷成像方法超声阵列数据较少。

项目成果

Elastic wave analysis of composite materials using fast multipole boundary element method

使用快速多极边界元法进行复合材料弹性波分析

• 发表时间: 2005
• 期刊: Transactions of the Japan Society for Computational Methods in Engineering 5
• 作者: T.Saitoh;K.Nagai;S.Hirose
• 通讯作者: S.Hirose

An Approximation Method for Multiple Scattering of Elastic Wave

弹性波多次散射的近似方法

• 发表时间: 2004
• 期刊: Computational Mechanics (Tsinghua University Press & Springer-Verlag) (CDROM)
• 作者: Kwannate Tharmmaporphilas;Sohichi Hirose
• 通讯作者: Sohichi Hirose

Two-dimensional Boundary Element Method for Elastic Wave Propagation in an Anisotropic Solid with Cracks

含裂纹各向异性固体中弹性波传播的二维边界元法

• 发表时间: 2004
• 期刊: Computational Engineering I- Advances in Continuum Mechanics and Electromagnetics, JASCOME
• 作者: A.T.Tan;S.Hirose
• 通讯作者: S.Hirose

高速多重極境界要素法を用いた超音波の多重散乱シミュレーション

使用快速多极边界元法进行超声多重散射模拟

• 发表时间: 2005
• 期刊: 計算工学講演会論文集 10
• 作者: 斎藤隆泰;永井浩二;廣瀬壮一
• 通讯作者: 廣瀬壮一

Multiple Scattering Approximation of Anti-plane Elastic Waves in Infinite and Half-Space Domains with Distributed Inclusions

具有分布包裹体的无限半空间域反平面弹性波的多重散射近似

• 发表时间: 2006
• 期刊: Electronic Journal of Boundary Elements 4
• 作者: K.Tharmmapornphilas;S.Hirose
• 通讯作者: S.Hirose