地震工程学报Issue(2)：553-558,6.DOI:10.3969/j.issn.1000-0844.2015.02.0553
含方形凹陷半无限非均匀介质波动问题 FDM 模拟
FDM Simulation of Wave Motion in a Semi-infinite Inhomogeneous Medium with a Rectangular Depression
摘要
Abstract
Using the finite difference method,the two-dimensional elastic wave equation is pro-cessed to obtain the finite difference equation.Then,the differential elastic wave equation format is combined with the absorbing boundary and the discrete form of the free boundary.The elastic wave equation finite difference equation is formed to solve the problem.Using the finite difference equation,the displacement on different nodes can be obtained at different times for the rectangle-shaped depression of a semi-infinite inhomogeneous medium.Using the finite difference equation of the two-dimensional elastic wave equation combined with the scientific computation software, MATLAB,and the post-processor software,DIFEM ISOLINE PLOTER,the displacement isoline of the rectangle-shaped depression of the semi-infinite inhomogeneous medium in the x direction can be obtained for different times.The effect of the inhomogeneous media,absorbing boundary, and the rectangle-shaped depression on the wave characteristics is analyzed numerically.关键词
非均匀介质/波动/有限差分方法/凹陷/Higdon 吸收边界Key words
inhomogeneous media/wave motion/finite difference method/depression/Higdon absorbing boundary分类
数理科学引用本文复制引用
杨在林,孙铖,王耀,李志东..含方形凹陷半无限非均匀介质波动问题 FDM 模拟[J].地震工程学报,2015,(2):553-558,6.基金项目
2015年地震行业科研专项经费项目(201508026-02) （201508026-02）
黑龙江省自然科学基金(A201310) （A201310）
黑龙江省博士后科研启动金(LBH-Q13040) （LBH-Q13040）
