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《ACTA MECHANICA SINICA》 1995-01
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GENERALIZEDMULTI-TRANSMITTINGBOUNDARY:SCALAR WAVE CASE

LiaoZhenpeng;(Z.P. Liao);LiXiaojun(Institute of Engineering Mechanics,SSB,Harbin 150080, China)  
The multi-transmitting boundary condition has been generalized using spaceextrapolation to improve accuracy of the boundary condition in the time domain computa-tion. Refiection coefficients of the boundary in the frequency domain are formulated for twocases, in which the total wave fields are composed of the incident wave only and the incidentwave plus the fully developed refiecti on wave,respectively. The reflection coefficients arethen analyzed from a viewpoint of accuracv of the boundary in the time domain to illumi-nateadvantages of the generalized boundary over the previous one in reducing reflections ofthe traveling waves at large incident angles and the incident evanescent motion.
【Fund】: 地震科学联合基金
【CateGory Index】: O357.4
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