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用数字付里叶反演方法计算了点力垂直作用于对称轴上所产生并向横向各向同性介质中扩散的瞬时位移。波至时间与已经发表的群速度表达式相一致,其中包括多次波的出现时间及准SV波的尖点。对于象石膏一土壤薄层这类强各向异性介质,准SV波的最大振幅出现在尖点附近。在尖点之间,准SV波的波形是时变力的希尔伯特变换。关于奥斯汀白垩与石膏一土壤,其SH波的振幅随方向而变化。本文是已发表的同一标题文章的续篇。
Using the digital Fourier inversion method, the instantaneous displacements of the point force acting perpendicularly to the symmetry axis and diffusing into the transversely isotropic medium were calculated. Wave-to-time is consistent with published group velocity expressions, including the appearance of multiple waves and the sharp point of quasi-SV waves. For strongly anisotropic media like gypsum-soil thin layers, the maximum amplitude of quasi-SV waves appears near the sharp point. Between the sharp points, the quasi SV wave waveform is a time-varying Hilbert transform. About the Austin chalk and gypsum-soil, the amplitude of SH waves varies with direction. This article is a continuation of the same title article that has been published.