层状介质中的声波场及面波研究  

Study of acoustic wave and surface waves in stratified media

作　　者：张碧星[1] 喻明[1] 熊伟[1] 兰从庆[1] 

机构地区：[1]中国科学院武汉物理研究所,中南工业大学地球物理勘查新技术研究所

出　　处：《声学学报》1997年第3期230-241,共12页Acta Acustica

基　　金：国家自然科学基金

摘　　要：本文在前人基础上，采用B、P、C坐标系研究了层状介质中的声波场及面波特性，理论上发现了一个重要结论及一些新的性质，并数值分析了Rayleigh和Love面波的频散特性。定义了关于Rnyleigh面波的两个物理量β1（位移的民P分量比）和β2（应力的B，P分量比），经理论及数值分析发现：β1和β2与介质的层状结构密切相关，是对层状介质进行分析和判断的两个重要物理量。Abstract: The acoustic wave field and surface waves in stratified media are studied in B, P, C coordinate system in this paper on the basis of the previous works. An important result and some new properties are presented. The dispersion characteristics of Rayleigh and Love waves are numerically analyzed. Two physical quantities, β1 (the ratio of B to P components of displacement) and β2 (the ratio of B to P components of stress), are defined for Rayleigh wave. By the theoretical and numerical analyses, it is found that β1 and β2 ard closely related to the stratified structure of media, gi and β2 are two important physical quantities for the exploration of the structure of the interfaces of layers in stratified media.

关 键 词：声波传播 层状介质 面波 R波 L波 

分 类 号：O422[理学—声学]