基于无单元法的应力场与渗流场耦合分析模型

应用迭代解耦技术建立了基于无单元法的应力场与渗流场耦合分析计算模型并研制开发了计算程序。以矩形坝为例,计算比较了有无耦合作用时的坝体应力场和渗流场。结果表明,耦合作用时坝体的位移略小但分布规律一致;坝体的水平正应力分布差别较大,垂直正应力、剪应力和等势线变化较大,但分布规律一致。计算结果符合一般规律,用无单元法进行应力场和渗流场耦合分析是可行的。

Coupled Analysis Model of Stress Field and Seepage Field Based on Element-free Method

By the technique of de-coupling with iteration,a numerical analysis model is proposed for solving the coupled problem of stress field and seepage field by element-free method,and the calculation program is developed.In addition,a rectangular dam is taken as an example for solving its stress field and seepage field under considering the coupled action or not.It is shown that the displacement of dam under coupled condition is smaller than that of the not one,but their distributions are consistent.At the same time,the distributions of horizontal normal stress are different,and the vertical normal stress and shear stress and seepage equipotential lines are obviously different though their distributions are consistent as well.The calculation results accord with the general law.And the proposed coupled analysis for stress field and seepage field by element-free method is feasible.