摘要
基于Biot理论和u-p列式,推导了两相介质动力问题的控制方程。固相的位移和液相孔隙压力是两个基本的未知量。采用更新的Lagrangian方法和Jaumann应力对这一耦合问题进行了大变形分析。用建议的方法,对一饱和土柱在静力和动力荷载作用下的反应进行了数值模拟,并对大、小变形理论下的计算结果进行了对比。
On the basis of Biot＇s theory and the u-p formulation, governing equations for dynamic problem in two-phase media are derived. Displacements of solid phase and pore pressure of fluid phase are the two basic unknown variables. The updated Lagrangian method and Jaumann stress rate are adopted for large deformation analysis of the coupled problem. A saturated soil column subjected to step and dynamic load is numerically simulated by the proposed method, and comparison between large and small strain solutions is made.
出处
《工程力学》
EI
CSCD
北大核心
2007年第12期47-52,共6页
Engineering Mechanics
基金
国家重点基础研究发展计划(973计划)项目"碳酸盐岩缝洞型油藏开发基础研究"(2006CB202400)
关键词
土力学
数值模拟
两相介质
大变形
饱和土
soil mechanics
numerical simulation
two-phase media
large deformation
saturated soil
