饱和-非饱和非稳定渗流有限元分析方法的改进  

Improvement of finite element analysis of unstable saturated-unsaturated seepage

作　　者：周桂云[1,2] 

机构地区：[1]金陵科技学院建筑工程学院,江苏南京211169 [2]中国人民解放军理工大学工程兵工程学院,江苏南京210007

出　　处：《水利水电科技进展》2009年第1期5-7,11,共4页Advances in Science and Technology of Water Resources

基　　金：中国博士后科学基金(20080431343)

摘　　要：对饱和-非饱和非稳定渗流分析的有限元计算方法加以改进,提出饱和度对渗透压力偏导数的修正公式,消除了饱和-非饱和非稳定渗流计算中存在的数值弥散现象和参数拟合不收敛现象,使迭代收敛速度提高了3倍。同时也消除了有限元迭代求解过程中的振荡现象。经实例证明,本文方法是有效可行的。In order to improve the finite element analysis of saturated and unsaturated seepage, a formula for revising the differential ccefficient between saturation and pore pressure is put forward in this paper, which can be used to avoid the numerical dispersion in parameter fitting during the calculation of unstable saturated and unsaturated seepage so as to raise the convergence speed. Meanwhile, the oscillating phenomenon of the finite element iterative solution is eliminated. The results obtained from the examples show that the method is effective and feasible.

关 键 词：饱和-非饱和渗流 非稳定渗流 数值弥散 加速收敛 有限元法 

分 类 号：TV223.4[水利工程—水工结构工程]