%0 Journal Article
%T Theoretical Study on Laser-generated Ultrasound in the Structure with Continuous Changes of Near-surface Elastic Property<br>近表面弹性性质连续变化材料中激光声表面波的理论研究
%A YUAN Ling
%A SHEN Zhong-hua
%A GUAN Jian-fei
%A NI Xiao-wu
%A LU Jian
%A <br>袁玲
%A 沈中华
%A 关建飞
%A 倪晓武
%A 陆建
%J 光子学报
%D 2007
%I 
%X Taking account of the continuous changes of the near-surface elastic property,a model of multiple gradient layers on the substrate is estabilished.An optimized finite element is developed to simulate the laser thermo-elastic generation and propagation of surface acoustic waves in the system.The effection of the differeot near-surface depth and elastic property to surface acoustic wave is studied.Furthermore,the regular phase velocity is attained and analyzed.
%K Laser technique
%K Ultrasonics
%K Finite element method
%K Near-surface elastic property
%K Surface acoustic wave
%K Dispersion<br>激光技术
%K 超声学
%K 有限元法
%K 近表面弹性性质
%K 声表面波
%K 色散
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=E7658AFBBC7378170FB3911316540C3D&yid=A732AF04DDA03BB3&vid=933658645952ED9F&iid=F3090AE9B60B7ED1&sid=DF28BAAD0FD19027&eid=420937A57970FA8C&journal_id=1004-4213&journal_name=光子学报&referenced_num=0&reference_num=16