Numerical simulation for different dynamic coupling forms of saturated porous media

被引：0
|
作者：
Liu B. [1 ]
Su Q. [1 ,2 ]
Liu T. [1 ]
Li T. [1 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
[2] MOE Key Laboratory of High Speed Railway Engineering, Southwest Jiaotong Univeristy, Chengdu
来源：
Su, Qian (suqian@126.com) | 1600年 / Chinese Vibration Engineering Society卷 / 36期
关键词：
Biot model; Comsol Multiphysics; Saturated porous media; U-p equation; U-p-U equation;
D O I：
10.13465/j.cnki.jvs.2017.09.022
中图分类号：
学科分类号：
摘要：
Numerical simulation of dynamic behavior of saturated porous media is of great importance in many engineering problems. As pore fluid and solid skeleton interaction is hard to be decoupled, there are a lot of difficulties in numerical simulation. Aiming at characteristics of the partly coupled dynamic field equation u-p formulation and the fully coupled dynamic field equation u-p-U formulation, the FE weak forms of the corresponding dynamic coupling control equations were derived. These FE weak forms were successfully implemented in the finite element software Comsol Multiphysics and the time domain viscous boundarys with different dynamic coupling forms were introduced in simulating unbounded saturated porous media domain. The reasonability and feassibility of the model solving technique were verified by using the analytical solution and numerical one to dynamic response of one-dimensional saturated porous meida. Finally, based on u-p-U coapled form, the propagating features of stress waves in the dry sandsaturated sand foundation dynamic consolidation under impacting loads were investigated. The computation results showed that the slow longitudinal were has an obvious effect on the dynamic consolidation; the reasonable time duration of impacting load is beneficial to the improvement of consolidation effects. © 2017, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：146 / 152and213
相关论文
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