The reflection of plane waves in a poroelastic half-space saturated with inviscid fluid

被引:158
|
作者
Lin, CH [1 ]
Lee, VW [1 ]
Trifunac, MD [1 ]
机构
[1] Univ So Calif, Dept Civil Engn, Los Angeles, CA 90089 USA
关键词
poroelastic media; fluid saturation; wave propagation; wave reflection; wave energy;
D O I
10.1016/j.soildyn.2004.10.009
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
This paper discusses surface displacements, surface strain, rocking, and energy partitioning during reflection-of-plane waves in a fluid-saturated poroelastic half-space. The medium is modeled by Biot's theory, and is assumed to be saturated with inviscid fluid. A linear porosity-modulus relation based on experimental data on sandstones is used to determine the material parameters for Biot's model. Numerical results in terms of angle of incident waves and Poisson's ratio are illustrated for various porosities and degrees of solid frame stiffness. The results show that the amount of solid frame stiffness controls the response of a fluid-saturated porous system. A poroelastic medium with essentially dry-frame stiffness behaves like an elastic medium, and the influence of pore fluid increases as dry-frame stiffness is reduced. The effects of a second P-wave become noticeable in poroclastic media with low dry-frame stiffness. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:205 / 223
页数:19
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