| 二维有自由面渗流分析的有限元并行计算 |
| |
| 引用本文： | 杜晔华,胡云进,姚懿伦,董金祥.二维有自由面渗流分析的有限元并行计算[J].水力发电学报,2006,25(3):116-120. |
| |
| 作者姓名： | 杜晔华 胡云进 姚懿伦 董金祥 |
| |
| 作者单位： | 1. 浙江大学,计算机学院,杭州,310027
2. 浙江大学,水利与海洋工程学系,杭州,310027 |
| |
| 摘 要： | 建立了一个基于MPI消息传递的微机机群系统,进行了有自由面渗流的有限元并行分析。通过预处理共轭梯度法和逐个单元法技术的结合来求解方程组,采用前后处理的并行、负载均衡等技术,改善了程序性能。通过对土坝渗流进行并行数值模拟验证了模型的正确性和有效性。加速比、计算效率和可扩放性的测定表明,该模型对大型问题能够减少存储空间,提高运算速度,具有良好的可扩放性,有能力对大型工程,特别是土坝的渗流问题进行快速精确的模拟。
|
| 关 键 词： | 水力学 并行计算 有限元 虚节点法 渗流 |
| 收稿时间： | 2005-01-04 |
| 修稿时间： | 2005年1月4日 |
Parallel finite element method for 2D free surface seepage |
| |
| DU Yehua,HU Yunjin,YAO Yilun,DONG Jinxiang.Parallel finite element method for 2D free surface seepage[J].Journal of Hydroelectric Engineering,2006,25(3):116-120. |
| |
| Authors: | DU Yehua HU Yunjin YAO Yilun DONG Jinxiang |
| |
| Affiliation: | 1. Dept of Computer Science and Engineering, Zhejiang University, Hangzhou 310027 ; 2. Dept of Hydraulic and Ocean Engineering, Zhejiang University, Hangzhou 310027 |
| |
| Abstract: | Parallel 2D finite element method for computations of free surface seepage flows is presented in this paper.Computations are carried out by using a cluster of PCs under control of Linux operating system and an MPI library.Preconditioned conjugate gradient method combined with element-by-element strategy is used for solving algebraic equations to reduce storage space and execution time.In order to improve the performance of the cluster,several techniques such as pre-processing & post-processing parallelism and load balance are used.The performance of simulating the free surface seepage flow through a earth dam is analyzed.The experimental results show that the model presented herein not only is reasonable and feasible,but also has expandability and scalability when the large-scale free surface seepage flow through projects is simulated. |
| |
| Keywords: | hydraulics parallel calculation finite element method virtual node method seepage flow |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
