地震声波数值模拟中的透射边界条件

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英文篇名：Transmitting Boundary Conditions in Numerical Simulation of Acoustic Waves 中文刊名：科学技术与工程 英文刊名：Science Technology and Engineering 作者：邢丽 英文作者：XING Li(Department of Applied Mathematics ; Shanghai Second Polytechnic University ; ShangHai 201209 ; P.R.China) 中文关键词：地震声波数值模拟 ; 有限元 ; 有限差分 ; 吸收边界条件 ; CE ; MTF 英文关键词：acoustic wave equation Absorbing boundary condition CE MTF 出版日期：2009-07-01 机构：上海第二工业大学数学系; 年：2009 期：13 出版单位：科学技术与工程

摘要

地震波传播的数值模拟中,在有限区域建立吸收边界条件是一个很重要的问题。在不同类型的吸收边界条件中,比较经典地是Clayton和Engquist提出得Clayton-Engquist吸收边界条件,透射边界条件(MTF)是通过直接模拟各种单向波动的共同运动学特征来建立的一种边界条件,算法简单容易。重点讨论了MTF边界条件并通过数值计算与被传统应用的CE吸收边界条件作比较。
In the numerical simulation of the wave equation,develop an Absorbing boundary condition in the finite domain is a very important problem.In different kinds of Absorbing boundary conditions,a classical one is Clayton-Engquist(CE)conditions which developed by Clayton&Engquist 1977.Through direct simulation of a variety of one-way fluctuations in the common kinematical features to set up a series of boundary conditions,that are transmitting boundary conditions(MTF).Algorithm is simple and easily calculated.The MTF condition is focused on and by numerical calculation to compare with CE Absorbing boundary conditions.

引文

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    4邵秀民,蓝志凌.非均匀各项同性介质中地震波传播的数值模拟.地球物理学报,1995;38(增刊):39—55