地震波传播有限差分模拟的人工边界问题

英文篇名：ARTIFICIAL BOUNDARY PROBLEMS IN FINITE-DIFFERENCE MODELLING FOR SEISMIC WAVE PROPOGATIONS
中文刊名：地球物理学进展
英文刊名：PROGRESS IN GEOPHYSICS
作者：孙若昧
英文作者：Sun Ruomei(Institute of Geophysics ; the Chinese Academy of Science ; Beijing 100101)
中文关键词：有限差分 ; 人工边界 ; 虚假反射
英文关键词：Finite-difference artificial boundary artificial reflection
出版日期：1996-09-30
机构：中国科学院地球物理研究所
年：1996
期：03
出版单位：地球物理学进展

摘要

在用有限差分法模拟地震波传播中，差分网格人工边界的反射问题是至关重要的。本文简要介绍了几种消除人工边界反射的方法及其主要优缺点。联立这些不同的吸收边界条件于实际的有限差分计算可以给出好的结果。
Reflections generated by artificial boundaries of the finite-difference grids in space are a aevere problem in modelling for seismic wave propogations by using finite-difference methods. In this paper several methods for eliminating the reflections from artificial boundaries are introduced. We point out their advantages and disadvantages. A combination of these absorbing boundary conditions adapted to real structural model can give good results.

引文

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