General absorbing boundary conditions for dynamic analysis of fluid-saturated porous media |
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| Authors: | T Akiyoshi X Sun K Fuchida |
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| Institution: | ?Department of Civil Engineering and Architecture, Kumamoto University, Kurokami 2-39-1, Kumamoto 860, Japan;?Graduate School of Science and Technology, Kumamoto University, Kurokami 2-39-1, Kumamoto 860, Japan;¶Department of Civil and Architectural Engineering, Yatsushiro College of Technology, Yatsushiro 866, Japan |
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| Abstract: | General absorbing boundary conditions based on Biot's two-phase mixture theory and paraxial approximation is presented for the dynamic analysis of fluid-saturated porous media with isotropic, transverse isotropic, and anisotropic properties. For the last two cases, the equivalent Lame's constants, under conditions of uniqueness, are introduced to facilitate the analytical solutions. The numerical results show that the proposed absorbing boundary can greatly suppress spuriously reflected waves and efficiently model the far field of the system with sufficient accuracy. |
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| Keywords: | Soil mechanics Porous materials Saturation (materials composition) Boundary conditions Mathematical models Anisotropy Absorption Isotropic media Anisotropic media |
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