Love Waves in a FluidSaturated Double-Porosity Layer with Initial Stress

Abstract

Abstract:

Abstract： Based on the extended Biot theory for doubleporosity media, the propagation behavior of Love waves in a doubleporosity fluidsaturated layer with initial stress lying over a prestressed, anisotropic, inhomogeneous elastic halfspace was studied. The dispersion equation for the Love waves and the upper and lower bounds of the Love wave speed were derived. The effect of the medium characteristics such as porosity, inhomogeneity, anisotropy, initial stress was discussed. Numerical calculation shows that as the storage porosity, the fracture porosity or the percentage of the storage porosity in the total porosity of the layer increases, the phase velocity of Love wave increases. As the anisotropy or heterogeneity of the half space increases, the phase velocity of Love wave increases. No matter in the layer or the half space, tensile initial stresses increase the velocity of Love waves while compressive initial stresses in the layer decrease the velocity of Love waves.
Key words：

Key words: fluid-saturated double-porosity medium, inhomogeneity, initial stress, Love waves

CLC Number:

O 347

WU Jiaping,ZHAO Shexu. Love Waves in a FluidSaturated Double-Porosity Layer with Initial Stress[J]. Journal of Shanghai Jiaotong University, 2014, 48(12): 1777-1783.

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