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《Chinese Journal of Geophysics》 1994-04
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BOUNDARY ELEMENT METHOD FOR ELASTIC WAVE FORWARD MODELING

FU LI-YUN;MOU YONG-GUANG(University of Petroleum, Beijing 100083)  
Boundary element elastic wave seismic model method (BEESM) is applied to the numerical simulation of the acoustic and elastic wavefilds for 2-D and 3-Dcomplex models. Based on the characteristics of seismic model,this paper improves block Gaussian elimination method, in which both numerical integral calculation and matrix elimination are performed alternately,removing the singularities inherent to me boundary integral equation approach by using analytical method, tackling the absorbing boundary problem by use of infinite elements, adopting a variable element dimension technique that the element dimension is changed with medium velocity and calculated frequency. These techniques result in less internal storage,fast operation and high accuracy.
【Fund】: 高等学校博士学科点专项科研基金
【CateGory Index】: O347.41
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