基于改进弃单元法的渗流自由面计算

发布时间：2018-02-16 17:43

  本文关键词： 渗流 自由面 弃单元法 ANSYS　出处：《水电能源科学》2016年11期 　论文类型：期刊论文

【摘要】：为了将计算渗流自由面的弃单元法应用于ANSYS软件中,对其进行了改进,即根据每次迭代计算结果,将节点全部位于自由面以上的单元均删掉,从而使得总体传导矩阵的阶数不断降低,计算效率得到提高。在计算复合单元等效渗透系数时,对复合单元进行二次细分,以减小单元尺寸对计算结果的影响。计算收敛后,对复合单元上的节点插值求出零压头点坐标,再对零压头点进行曲线拟合或曲面拟合即得自由面。基于该方法,利用ANSYS的APDL语言编制了渗流自由面分析程序,并进行了实例分析。结果表明,提出的改进方法结构简单、精度较高。
[Abstract]:In order to apply the discard element method to the calculation of seepage free surface in ANSYS software, the method is improved, that is, according to the results of each iteration, all the nodes above the free surface are deleted. In order to reduce the order of the overall conduction matrix and improve the calculation efficiency, the composite element is subdivided twice in order to reduce the effect of element size on the calculation results. The point coordinates of zero pressure head are obtained by interpolating the nodes on the composite element, and then the free surface is obtained by curve fitting or surface fitting. Based on this method, the free surface analysis program of seepage flow is compiled by using APDL language of ANSYS. The results show that the improved method is simple in structure and high in precision.
【作者单位】： 中铁第一勘察设计院集团有限公司;
【分类号】：TV139.1
，

本文编号：1516078