安新-宽城测深剖面的时域有限差分数值模拟  

The finite difference time domain simulation on Anxin Kuancheng deep seismic sounding profile

作　　者：彭菲[1] 陈棋福[1] 刘澜波[1,2] 陈颙[1] 

机构地区：[1]中国地震局地震预测研究所,北京100036 [2]康涅狄格大学,美国

出　　处：《地震》2008年第2期54-64,共11页Earthquake

基　　金：国际科技合作项目(2006DFA21650)资助

摘　　要：利用时域有限差分方法进行地震波模拟能够得到丰富的波场信息,对研究复杂地质构造条件下的地震波波场十分有效。该文在对时域有限差分方法进行概述的基础上,以2002年4月施测的安新—宽城地震测深剖面资料为基础,采用时域有限差分方法对该剖面进行二维全波数值模拟,同时以理想匹配层作为模拟的吸收边界条件。将模拟得到的合成地震图,通过与野外实验得到的记录截面和射线追踪合成记录相比较和讨论,验证了时域有限差分方法在模拟地震波传播过程的有效性。Using the method of finite difference time domain to simulate the seismic wave can obtain much more information of the wave field. It is very effective to investigate the seismic wave field on complex geological background. In this paper, the finite difference time domain （FDTD） was briefly introduced. For the Anxin Kuancheng deep seismic sounding profile conducted on April 2002, the two-dimensional full wave numerical simulation was performed with FDTD method, as well as the perfectly matched layer as the absorbing boundary condition. Discussing and comparing the FDTD simulation synthetic seismograms with the recorded sections and the synthetic results given by ray tracing method, the effectiveness of the finite difference time domain method for the simulation of the seismic wave propagation has been proved.

关 键 词：地震波场 二维模拟 时域有限差分 吸收边界 

分 类 号：P315.7[天文地球—地震学]