计算横向非均匀介质体波理论地震图的Maslov渐近法  

MASLOV'S ASYMPTOTIC METHOD OF CALCULATING THE THEORETICAL SEISMOGRAM OF BODY WAVES IN THE LATERAL INHOMOGENEOUS MEDIUM

作　　者：朱良保[1] 

机构地区：[1]国家地震局地球物理研究所

出　　处：《地球物理学报》1989年第2期163-172,共10页Chinese Journal of Geophysics

摘　　要：本文运用Maslov渐近理论编写的二维横向非均匀介质中的理论地震图程序,与其它类型算法作了精确对比,结果表明,在层状介质模型中,本程序的结果无论振幅还是波形对比都与反射率法基本相同。对于二维横向非均匀模型,在射线理论的非奇点处,本算法与射线方法基本一致,在射线理论的奇异点处,Maslov方法消除了射线理论所固有奇点,提高了计算精度。In this paper, Maslov's asymptotic theory is used to program the theoretical seismogram for the two-dimentional lateral inhomogeneous medium. Compared with other types of computation, the result indicates that both the amplitude and the wave form for the model of layered medium are basically similar to the reflectivity method. For the two-dimensional lateral inhogeneous model, the result is basically coincident with the ray method at the non-singular points of the ray theory. At the singular points of the ray theory, using Maslov's method, the intrinsic singularity of the ray theory has been eliminated and the calculation accuracy has been raised.

关 键 词：非钧匀介质 Maslov渐近法 地震图 

分 类 号：P315.01[天文地球—地震学]