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《Progress in Geophysics》 2006-01
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The appication of generalized WKB to wave field's simulation

BAN Shu-hao, LI Xiao-yan(Jiangsu polytechnic University,Changzhou 213016,China)  
Based on 2-deminsion wave equation using Fourier transform this paper gives Helmholtz equation and the generalized WKB,which is a new approximation method for solving difficulties in wave field analogy and difficulties of inversion in seismic exploration.The method can make it more approximation to Helmholtz equation and it's answers include WKB approximation.The difference between WKB and generalized WKB is illustrated in numerical experiment by figures.From the results,we may draw that the generalized WKB is the development of WKB method with greater dominance in solving the problems with nonlinear wave number.
【CateGory Index】: P631.4
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