【摘要】 针对有限元计算过程中出现的数值弥散现象,提出了容水度的改进算法并编制了程序,模拟了复合土工膜缺陷渗漏量室内物理模型试验,给出试验过程中饱和-非饱和渗流场的变化过程。计算结果表明,改进后的程序能有效地消除数值弥散现象,与试验结果基本吻合。更多还原

【Abstract】 This paper describes the fundamental equations,the necessary and sufficient conditions,the finite element interactive calculation progress of the unsteady saturated-unsaturated seepage.For finite element calculations that often appear in the numerical dispersion phenomenon,the law and its approach are studied,and then the calculation of water capacity is improved, and edit finite element program.Finally,it simulate leakage of the composite geomembrance core defects in indoor physical model experiments is simulated,and is edited the transformation in saturated-unsaturated seepage field is given out.The calculation shows that the proved program can eliminate the numerical dispersion phenomenon effectively,and the results essentially match with the experiment.更多还原