Thermoelastic Excitation of Transient Lamb Wave in an Orthotropic Thin Plate  

作　　者：CHENG Jian-chun FU Tao ZHANG Shu-yi 程建春;傅涛;张淑仪(Laboratory of Modern Acoustics and Institute of Acoustics,Department of Electronic Science and Engineering,Nanjing University,Nanjing 210093)

机构地区：[1]Laboratory of Modern Acoustics and Institute of Acoustics,Department of Electronic Science and Engineering,Nanjing University,Nanjing 210093

出　　处：《Chinese Physics Letters》1999年第3期187-189,共3页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No.19574024;the Natural Science Foundation of Jiangsu Province under Grant No.BK97031.

摘　　要：A numerical method to simulate thermoelastic excitation of transient Lamb wave propagating along arbitrary directions in orthotropic plates is presented by employing the expansion method of the Lamb wave modes.The displacement is expressed by a summation of the symmetric and antisymmetric modes in the surface stress-free orthotropic plate,and it is particularly suitable for waveform analyses of Lamb wave in orthotropic thin plates because one needs only to calculate the lowest few modes.The characteristics of dispersion and transient wave-forms are analyzed for a transversely isotropic plate.The results show that this method provides a quantitative analysis to Characterize anisotropic properties and elastic stiffness properties of the orthotropic plates by the laser-generated Lamb wave detection.

关 键 词：ORTHOTROPIC WAVE TRANSIENT 

分 类 号：O34[理学—固体力学]