液饱和多孔介质中瑞利型波的弥散和衰减  

Dispersion and Attenuation of Rayleigh-type Waues in a Liquid-saturated Porous Medium

作　　者：刘占芳[1] 黄民战[2] 李德源[1] 

机构地区：[1]重庆大学工程力学系,重庆400044 [2]塔里木油田分公司勘探开发研究院,新疆841000

出　　处：《重庆大学学报（自然科学版）》2000年第z1期6-9,17,共5页Journal of Chongqing University

摘　　要：研究了由一种多孔固体骨架和一种无粘液体构成的多孔介质的瑞利型表面波的传播 ,获得了联系着复波数对频率的依赖关系的弥散方程 ,其结果表明表面波是弥散和非均匀的 ,表面波沿多孔介质表面衰减 。An investigation is conducted of propagation of surface waves in a porous medium consisting of a microscopically incompressible solid skeleton in which a microscopically incompressible liquid flows within the interconnected pores, and particularly the case where the solid skeleton deforms linear elastically. The frequency equation of Rayleigh-type waves is derived relating the dependence of wave numbers, being complex quantities, on frequency, as a result those waves are dispersive as well as inhomogeneous. Nevertheless, the amplitude of surface wave attenuate along the surface of the medium, whereas they decay exponentially receding from the surface of the medium.

关 键 词：瑞利型波 弥散 衰减 

分 类 号：O347.4[理学—固体力学]