Propagation of Transient Elastic Waves in Stratified Anisotropic Media - 1st Edition - ISBN: 9780444702944, 9781483295909

Propagation of Transient Elastic Waves in Stratified Anisotropic Media, Volume 32

1st Edition

Authors: J.H.M.T. van der Hijden
eBook ISBN: 9781483295909
Imprint: North Holland
Published Date: 1st October 1987
Page Count: 298
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Table of Contents

  1. Introduction. 2. Basic Relations for Elastic Waves in Stratified, Piecewise Homogeneous, Anisotropic Media. 3. Basic Relations for Elastic Waves in Stratified, Piecewise Homogeneous, Isotropic Media. 4. Radiation from an Impulsive Source in an Unbounded Homogeneous Isotropic Solid. 5. Radiation from an Impulsive Source in a Stratified Isotropic Medium. 6. Radiation from an Impulsive Source in an Unbounded Homogeneous Anisotropic Solid. 7. Radiation from an Impulsive Source in a Stratified Anisotropic Medium. Appendices: The Slowness Surface of a Homogeneous Anisotropic Medium. Up- and Down-Going Waves in a Homogeneous Anisotropic Medium. The Values of s3±n for Large |s|. The Transversely Isotropic Medium and its Stiffness Tensor. Simplified Formulation for Unbounded Medium in the Two-Dimensional Problem. References. Index.

Description

Seismic waves are one of the standard diagnostic tools used to determine the mechanical parameters (volume density of mass, compressibility, elastic stiffness) in the interior of the earth and the geometry of subsurface structures. There is increasing evidence that in the interpretation of seismic data - especially shear-wave data - the influence of anisotropy must be taken into account.

This volume presents a method to compute the seismic waves that are generated by an impulsive source in a stratified anisotropic medium. Although written with the seismic applications in mind, the method that is developed is not limited to solid-earth geophysics. In fact, the methods discussed in this monograph are applicable wherever waves propagate in stratified, anisotropic media.

The standard approach to this problem is to employ Fourier transformations with respect to time and with respect to the horizontal spatial coordinates. To obtain numerical results, the relevant inverse transformations then have to be evaluated numerically. In this monograph the problem is, in contrast to the standard approach, solved by applying the Cagniard-de Hoop method and by representing the wave field as a sum of generalized rays. With this method, the computational results can be obtained relatively easily with any degree of accuracy, and with considerably less computation time. For completeness, analysis of acoustic waves in stratified isotropic media is included. Furthermore, for large horizontal or vertical source-receiver separations very efficient approximations are derived. Several examples and applications are given.


Details

No. of pages:
298
Language:
English
Copyright:
© North Holland 1987
Published:
Imprint:
North Holland
eBook ISBN:
9781483295909

About the Authors

J.H.M.T. van der Hijden Author