ABSORBING BOUNDARY-CONDITIONS FOR DYNAMIC ANALYSIS OF FLUID-SATURATED POROUS-MEDIA

作者：AKIYOSHI T^*; FUCHIDA K; FANG HL

来源：Soil Dynamics and Earthquake Engineering, 1994, 13(6): 387-397.

DOI：10.1016/0267-7261(94)90009-4

• FLUID-SATURATED POROUS MEDIA
• DYNAMIC
• ABSORBING BOUNDARY
• INFINITE DOMAIN

Based on Biot's two-phase mixture theory and the paraxial approximation, the absorbing boundary conditions in the time domain for u-w, u-U and u-p formulations are presented for the dynamic analysis of fluid-saturated porous media. These absorbing boundaries are equivalent to the viscous boundaries in the fundamental mode. The expressions for the energy ratio and reflection coefficient between the reflected and incident waves along the absorbing boundary are given. The numerical results show that the proposed absorbing boundaries can greatly suppress the spuriously reflected wave and model the far field of the system. These results also demonstrate the accuracy and efficiency of the proposed method for the transient dynamic analysis of infinite fluid-saturated porous media.

• 出版日期1994