Dynamic Analysis of an Infinite Cylindrical Hole in a Saturated Poroelastic Medium |
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Authors: | Jian-Fei Lu Dong-Sheng Jeng |
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Affiliation: | (1) Mathematics and Physics College, Jiangsu University, Zhenjiang, Jiangsu, 212013, P.R. China;(2) School of Civil Engineering, The University of Sydney, Sydney, NSW 2006, Australia |
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Abstract: | In this paper, the dynamic response of an infinite cylindrical hole embedded in a porous medium and subjected to an axisymmetric ring load is investigated. Two scalar potentials and two vector potentials are introduced to decouple the governing equations of Biot’s theory. By taking a Fourier transform with respect to time and the axial coordinate, we derive general solutions for the potentials, displacements, stresses and pore pressures in the frequency-wave-number domain. Using the general solutions and a set of boundary conditions applied at the hole surface, the frequency-wave-number domain solutions for the proposed problem are determined. Numerical inversion of the Fourier transform with respect to the axial wave number yields the frequency domain solutions, while a double inverse Fourier transform with respect to frequency as well as the axial wave number generates the time-space domain solution. The numerical results of this paper indicate that the dynamic response of a porous medium surrounding an infinite hole is dependant upon many factors including the parameters of the porous media, the location of receivers, the boundary conditions along the hole surface as well as the load characteristics. |
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Keywords: | Porous media Infinite cylindrical hole Biot’ s theory Fourier transform |
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