PML Absorbing Boundary Condition for Seismic Numerical Modeling by Convolutional Differentiator in Fluid-Saturated Porous Media  

作　　者：李信富 

机构地区：[1]Key Laboratory of Geo-detection(China University of Geosciences,Beijing),Ministry of Education [2]School of Geophysics and Information Technology,China University of Geosciences

出　　处：《Journal of Earth Science》2011年第3期377-385,共9页地球科学学刊（英文版）

基　　金：supported by the National Natural ScienceFoundation of China (No. 40804008)

摘　　要：The perfectly matched layer（PML） was first introduced by Berenger as an absorbing boundary condition for electromagnetic wave propagation.In this article,a method is developed to ex-tend the PML to simulating seismic wave propagation in fluid-saturated porous medium.This non-physical boundary is used at the computational edge of a Forsyte polynomial convolutional differenti-ator（FPCD） algorithm as an absorbing boundary condition to truncate unbounded media.The incor-poration of PML in Biot＇s equations is given.Numerical results show that the PML absorbing bound-ary condition attenuates the outgoing waves effectively and eliminates the reflections adequately.The perfectly matched layer（PML） was first introduced by Berenger as an absorbing boundary condition for electromagnetic wave propagation.In this article,a method is developed to ex-tend the PML to simulating seismic wave propagation in fluid-saturated porous medium.This non-physical boundary is used at the computational edge of a Forsyte polynomial convolutional differenti-ator（FPCD） algorithm as an absorbing boundary condition to truncate unbounded media.The incor-poration of PML in Biot＇s equations is given.Numerical results show that the PML absorbing bound-ary condition attenuates the outgoing waves effectively and eliminates the reflections adequately.

关 键 词：seismic wave numerical modeling convolutional differentiator PML absorbing boundary condition fluid-saturated porous medium. 

分 类 号：P315.31[天文地球—地震学]