横向各向同性介质中群速度的计算  

CALCULATION OF GROUP VELOCITY IN TRANSVERSELY ISOTROPIC MEDIA

作　　者：张文生[1] 何樵登[1] 朱建伟[1] 韩立国[1] 

机构地区：[1]长春地质学院

出　　处：《物探化探计算技术》1997年第2期97-102,共6页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家自然科学基金资助

摘　　要：各向异性走时计算和走时反演常需计算群速度，群速度的表达式通常在弱各向异性假设下给出。本文就横向各向同性介质中几种常见的群速度表示法进行了研究，给出了相应的计算方法，用数值例子讨论了它们所能近似的各向异性强度，并比较了相互的优劣。Traveltime calculation and traveltime inversion for anisotropy usually need to calculate group velocity. The formulae of group velocity are often given on the assumption of weak anisotropy. In the paper, several usual expressions of group velocity are studied and their calculating methods are given. The degree of anisotropy to which these formulae can approximate is discussed using the numerical results and their advantages and disadvantages are compared. It has great significance to traveltime calculation and traveltime inversion for anisotropy.

关 键 词：各向同性介质 群速度 各向异性强度 地震勘探 

分 类 号：O343[理学—固体力学] P631.41[理学—力学]