三维复杂无压渗流场求解方法研究

本文针对三维无压渗流问题提出了固定网格虚域迭代法 ,在此基础上引入加速迭代求解的不变网格丢单元法 ,该方法能在不变网格的基础上很好地适应强非线性问题自由面振荡及不易收敛的特点 ,同时研制了相应的算法和程序 ,算例计算对比表明 ,本文提出的方法在理论和算法上是正确的。将之应用于某双曲拱坝坝基渗流场分析 ,成功分析了坝基的渗流特性。

Study on solution of 3-D complex unconfined seepage field

The iteration method of virtual zone with invariable mesh is presented in this paper for 3-D unconfined seepage problem.On the above basis,the discarding element method of accelerating iteration solution is introduced.The method can be commendably adaptable to the circumstance that extreme non-linear problem oscillates for its free surface and becomes difficult to converge.Then,the algorithm and program are carried out.The result of the example shows that the method presented in this paper is right for its theory and algorithm.The seepage properties of the dam foundation are successfully analyzed by the application of the method for the foundation of a hyperbolic arch dam.