资源简介
基于MATLAB实现的 二维有限差分正演模拟程序 PML边界条件 可直接用于RTM
代码片段和文件信息
function [seisbc_topbc_bottombc_leftbc_rightbc_p_ntbc_p_nt_1]...
=a2d_mod_abc24(vnbcdxntdtssxszgxgzisFS)
% Copyright (C) 2010 Center for Subsurface Imaging and Fluid Modeling (CSIM)
% King Abdullah University of Science and Technology All rights reserved.
%
% author: Xin Wang
% email: xin.wang@kaust.edu.sa
% date: Sep 26 2012
% purpose: 2DTDFD solution to acoustic wave equation with accuracy of 2-8
% use the absorbing boundary condition
%
% IN v(::) -- velocity nbc -- grid number of boundary
% dx -- grid intervel nt -- number of sample
% dt -- time interval s(:) -- wavelet
% sxsz -- src position gx(:)gz(:) -- rec position
% isFS -- if is Free Surface condition
% OUT seis(::) -- Output seismogram
% bc_top(:::) -- array for storing top boundary condition
% bc_bottom(:::) -- array for storing bottom boundary condition
% bc_left(:::) -- array for storing left boundary condition
% bc_right(:::) -- array for storing right boundary condition
% bc_p_nt(::) -- array for storing the last time step wavefield
% bc_p_nt_1(::) -- array for storing the second last time step wavefield
seis=zeros(ntnumel(gx));[nznx]=size(v);
ng=numel(gx);
c1 = -2.5; c2 = 4.0/3.0
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