AN OPTIMAL ABSORBING BOUNDARY-CONDITION FOR ELASTIC-WAVE MODELING

被引:42
作者
PENG, CB [1 ]
TOKSOZ, MN [1 ]
机构
[1] MIT,DEPT EARTH ATMOSPHER & PLANETARY SCI,EARTH RESOURCES LAB,CAMBRIDGE,MA 02139
关键词
D O I
10.1190/1.1443758
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
The optimal absorbing condition yields reflection coefficients about 10-20 dB less in magnitude than the Higdon absorbing condition and about 20-30 dB less than the Reynolds absorbing condition for a fixed extrapolation length that is two steps in both time and space. Realistic 3-D elastic finite-difference modeling of wave propagation on a parallel computer nCUBE-2 shows that the optimal absorbing boundary condition is superior to those of Reynolds and Higdon. The fast algorithm enables one to compute the coefficients of the optimal absorbing boundary conditions accurately and efficiently. -from Authors
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收藏
页码:296 / 301
页数:6
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