地震波走时和射线的有限差分计算  

FINITE-DIFFERENCE CALCULATION OF TRAVEL TIMES AND RAYS OF THE SEISMIC WAVE

作　　者：赵成斌[1] 许云[1] 乌达巴拉[1] 

机构地区：[1]国家地震局地球物理勘探大队,中国地质大学

出　　处：《华北地震科学》1995年第4期41-46,共6页North China Earthquake Sciences

摘　　要：以往都是采用射线追踪的方法计算地震波的走时和射线，但是当速度模型复杂时这种方法存在一些问题。本文提出另一种计算地震波走时和射线的方法。该方法从程函方程出发，利用互换原理和Ｆｅｒｍａｔ原理计算出各种波的到时和射线。解决了射线追踪方法存在的问题。为地震波走时和射线的计算以及地震波走时反演开辟了一条新途径。Travel times and rays of the seismic wave are generally calculated with the ray tracing method. There are some problems in the method when a velocity model is very complex. A new method of calculating the travel times and rays is advanced in this paper. The method starts with the eikonal equation and calculates all kinds of travel times and raypaths using the reciprocity principle and fermat principle,so it solves the problems in the ray tracing calculation. It opens a new way for calculating travel time andray of the seismic wave and the travel time inversion of the seismic wave.

关 键 词：地震波 射线追踪 有限差分法 互相关 走时 

分 类 号：P315.3[天文地球—地震学]