饱和多孔介质大变形分析的一种有限元-有限体积混合方法

建立了饱和多孔介质大变形分析的一种有限元-有限体积混合计算方法.将饱和多孔介质视为由固体骨架和孔隙水组成的两相体,其基本方程包括动力平衡方程和渗流连续方程.基于u-p假定和更新的Lagrange方法,饱和多孔介质的动力平衡方程在空间域内采用有限元方法进行离散,而渗流连续方程在空阃域内则采用有限体积法进行离散.通过两个数值算例,一维有限弹性固结和动力荷载作用下堤坝动力响应的计算,验证了该方法的有效性.

An finite element-finite volume hybrid method for large deformation analysis of porous media

A finite element-finite volume hybrid method for large deformation analysis of porous media is proposed.The porous media is consideredas two-phase material with a solid skeleton and a pore fluid phase.Governing equations for the porous media consist of an equilibrium equation and a continuity equation.Based on the u-p formulation and updated Lagrangian method,the equilibrium equation is discretized in the space domain by finite element method,and the continuity equation by finite volume method.Two numerical examples including one-dimensional finite elastic consolidation and dynamic analysis of an embankment are used to illustrate the performance of the proposed method.