激光超声方法研究固-固界面波传播特性  

Study on solid-solid interface waves with laser ultrasonics

作　　者：韩庆邦[1] 钱梦騄[2] 朱昌平[1] 

机构地区：[1]河海大学计算机与信息工程学院常州校区,常州213022 [2]同济大学声学研究所,上海200092

出　　处：《物理学报》2007年第1期313-320,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10234060;10374070和10574038)资助的课题~~

摘　　要：对界面波的传播特性进行了理论及实验研究.首先探讨了界面波的求根问题,基于黎曼面分析,给出了求解界面波特征方程所有根的一般方法.理论上对三种常见的界面波——Stoneley波,LeakyRayleigh及LeakyInterface波传播机理进行了分析,描述了三种界面波的波矢及位移势在两种介质中的状态.最后基于光弹效应原理,利用全光学的激光超声手段对界面波进行了实验测量,实测结果与理论符合很好.The propagation characteristics of interface waves are studied theoretically and experimentally. The problem of solving for roots of characterization equation of interface waves are discussed. It is shown that all roots can be found by means of Riemann sheet analysis. The propagation mechanism of Stoneley wave, Leaky Rayleigh and Leaky interface waves are explored, the wave vector and displacement behaviors of these waves are illustrated to show their differences. At last, the interface waves are measured with laser ultrasonic technique based on photo-elastic effect, and the experimental results are in good agreement with theoretical predictions.

关 键 词：界面波 激光超声 光弹效应 

分 类 号：O422[理学—声学]