瑞雷波多模频散的方位各向异性特征  

Azimuthally Anisotropy of Multi-mode Rayleigh Waves

作　　者：彭超[1,2] 张双喜[1] 李孟奎[1] 刘思莹[1] 

机构地区：[1]武汉大学测绘学院,湖北武汉430079 [2]铁道第三勘察设计院集团有限公司,天津300251

出　　处：《武汉大学学报（信息科学版）》2014年第2期157-160,165,共5页Geomatics and Information Science of Wuhan University

基　　金：国家973计划资助项目(2007CB714405);中央高校基本科研业务费专项资金资助项目(2012214020205)~~

摘　　要：基于Thomsen各向异性参数，使用频率一相速度变化率曲线，分析了瑞雷波多模频散的方位各向异性特征。在0°-90°范围内，方位角为45°时，频散方位各向异性程度最大；整体上，高模频散的方位各向异性度大于基模。The discussion of Rayleigh waves in near-surface investigations is rarely based on layered anisotropy media, even as higher-mode Rayleigh waves are a hot topic in near-surface investigation. This paper discusses the azimuthally anisotropy of multi-mode Rayleigh waves in layered azimuthally anisotropic media. The azimuthally anisotropy degree of 45°is the highest. In most situations, the higher modes of Rayleigh waves are more sensitive to the azimuthally anisotropy than the fundamental mode.

关 键 词：瑞雷波 多模频散 方位各向异性中图法 

分 类 号：P227[天文地球—大地测量学与测量工程]