摘要
应用有限元计算设有排水井的渗流场，为便于和单元衔接和减少单元数量，须对排水井做某些计算上的处理。论文列出两种处理方法：其一，由论文作者提出的转化为等效的多边形井，以便于和郝井单元衔接；其二，沿用李祖贻、陈平提出的转化为等效的n个合井单元，但改追了其对四面体合并单元流量计算中的一面积系数。文中算例均先求出其理论解，以便和井不同处理方法的计算结果比较，可据以选择最佳的井处理方法和估算其误差大小．
To calculate seepage fields with drainage wells by finite element method, wells must be treated for the purpose to join the adjacent elements conveniently and decrease the number of elements. Two treating methods are applied in this paper： （1） to transform the circular well into a equivalent regular polygon, this method is presented by the author; （2） to transform the well into some well＇s elements with different permeability coefficient and possessing the same effect of wells, this method had been presented first by LI Zuyi and Chert Ping. For the well＇s elements of tetrahedral shape, according to theoretical analysis the reduced coefficient of areas by which flow quantity is calculated is raised from 1/4 suggested by LI Zuyi and Chen Ping to 1/3 in this paper. The analytic solutions of all examples are given to compare with the results calculated by finite element method in which wells are treated by different methods, according to this comparing datum the better treating method may be selected.
关键词
渗流
排水井
有限元
seepage
drainage wells
finite element method
