| 改进的单元渗透矩阵调整法求解无压渗流场 |
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| 引用本文： | 朱军,刘光廷. 改进的单元渗透矩阵调整法求解无压渗流场[J]. 水利学报, 2001, 32(8): 0049-0053 |
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| 作者姓名： | 朱军 刘光廷 |
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| 作者单位： | 清华大学水利水电系 |
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| 摘 要： | 针对现有单元渗透矩阵调整法解决无压渗流问题的不足，本文提出了改进算法，该法在调整渗透矩阵时对单元不同高斯点取不同的渗透系数，水上高斯点取原值，以此原则计算单元渗透矩阵，从而避免了单元被自由面切割部分的体积求解，文中中同时对溢出面的处理提出了新的见解。经实例证明，本方法是有效可行的。
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| 关 键 词： | 有限元 无压渗流 自由面 溢出面 |
| 文章编号： | 0559-9350(2001)08-0049-04 |
| 修稿时间： | 2000-05-19 |
An improved method for calculating unconfined seepage with changing element conductivity matrix |
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| ZHU Jun,LIU Guang-ting. An improved method for calculating unconfined seepage with changing element conductivity matrix[J]. Journal of Hydraulic Engineering, 2001, 32(8): 0049-0053 |
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| Authors: | ZHU Jun LIU Guang-ting |
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| Affiliation: | 1.Tsinghua University, Beijing 100084, China |
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| Abstract: | An improved method for claculating unconfined seepage is proposed.This algorithmadopts diiferent permeability coefficient at different Gauss point during adjusting the conductivity matrix.The coefficient is 1/100 of the original value at the surface but keep unchanged in water.According to this principle,the calculation for the volume of elements intersected by free surface can be avoided.At the same time,a new idea for treatment of seepage surface is suggested.The example demonstrates that this method is feasible. |
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| Keywords: | finite element unconfined seepage free surface conductivity matrix permeability coefficient |
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