A Boundary Element Method For Wave Scattering In Fluid-saturated Porous Rocks
Free (open access)
185 - 195
A. Furukawa, T. Saitoh, S. Hirose
Wave analysis in rocks is widely used in earthquake engineering and geophysical exploration. Rocks under the ground include pores and cracks which are saturated with pore fluid. Waves which propagate in the rocks are affected by these cracks and pore fluid. Therefore, in the numerical simulation of the rocks, it is necessary to consider the effects of both anisotropy and pore fluid. Biot has been proposed as a mechanical model for describing the behavior of such a rock, and this model forms a foundation for wave analysis of general anisotropic fluid-saturated porous solids. This study aims to develop a boundary element method for wave scattering in general anisotropic fluid-saturated porous solids. Formulation is based on the following two kinds of boundary integral equations: one is those for displacement of the solid skeleton and the other is for fluid pressure. Green’s function for wave analysis in general anisotropic fluid-saturated porous solids is derived by using Radon and Fourier transforms in space. Some numerical examples show the validity of our proposed method.
boundary element method, fluid-saturated porous solid, anisotropy