摘要
通过分析平面简谐纵波入射二维散射系统散射场远场Ｂｏｒｎ近似解纵波部分的固有性态，给出了二维Ｆｏｕｒｉｅｒ变换法建立散射区域（缺陷）的特征函数与散射场Ｂｏｒｎ近似解形状因子联系的关系式，并对钛合金中正方形铝夹杂和圆形孔穴分别进行了计算机模拟识别。本文的研究对定量无损探伤技术（ＱＮＤＴ）具有重大的理论和应用价值。
On the basis of the intrinsical performance of the frequency domain Born approximate solution for the scattering of two dimentional elastic wave,the relation between the characteristic function and the shape factor is given by two dimentional Fourier transform. Finally,simulated identification is performed for two shapes of defects on computer.
出处
《工程力学》
EI
CSCD
1994年第2期105-109,共5页
Engineering Mechanics
基金
国家自然科学基金
国家教委博士点基金
关键词
散射
逆Born近似
弹性动力学
elastic wave
scattering
inverse Born approxi mation
shape factor
characteristic function
