PROPAGATION INVARIANTS, REFLECTION AND TRANSMISSION IN ANISOTROPIC, LATERALLY HETEROGENEOUS MEDIA

被引：31

作者：

KENNETT, BLN ^{[1
]}

KOKETSU, K ^{[1
]}

HAINES, AJ ^{[1
]}

机构：

[1] DSIR,DIV GEOPHYS,WELLINGTON,NEW ZEALAND

来源：

GEOPHYSICAL JOURNAL INTERNATIONAL | 1990年 / 103卷 / 01期

关键词：

anisotropy; lateral heterogeneity; reflection; seismic waves; transmission;

D O I：

10.1111/j.1365-246X.1990.tb01755.x

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

For quasi‐stratified media in which the principal variation in seismic properties is with depth, propagation invariants can be constructed from certain combinations of the displacement and tractions elements of two seismic wavefields. These invariants are independent of depth and vanish for identical wavefields, and are constructed for anisotropic, laterally varying media in the spatial and wavenumber domains. These propagation invariants can be exploited to substantially simplify the construction of reflection and transmission processes in laterally varying media, including coupling between wavenumbers. The implementation of this approach is illustrated by application to the incidence of SH‐waves on an irregular interface below a free surface. The results are in excellent agreement with those from other schemes but take about 20 per cent less computation time. Even greater improvements in calculation speed are possible in more complex models. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：95 / 101

页数：7

共 15 条

[1] SURFACE MOTION OF A LAYERED MEDIUM HAVING AN IRREGULAR INTERFACE DUE TO INCIDENT PLANE SH WAVES [J].