大规模水闸非线性有限元并行计算研究

Study of Nonlinear Finite Element Parallel Computing based on Large-Scale Lock

借助开源的PETSc并行数值算法包,使用C++编写了一个基于消息传递模式的非线性弹性有限元的并行计算程序.程序通过多次调用PETSc中的求解器组件KSP完成了Duncan-Chang双曲线模型的并行有限元分析.最后通过一个实际工程水闸模型进行测试,结果表明多线程的计算效率比单线程的计算效率要高,四个进程的加速比达到了1.91.同时也表明,通过借助于成熟的数学工具箱进行非线性有限元并行程序开发是可行的,有效的.

With the help of the open source PETSc parallel numerical algorithm package,C ＋ ＋ is used to write a nonlinear elastic finite element parallel computing program based on the model of message passing. The procedure is completed in parallel finite element analysis of Duncan-Chang hyperbola model by the KSP solver component repeatedly calls in PETSc. Through a practical engineering of sluice model to test,the result show that the calculation efficiency of multi thread is higher than the calculation efficiency of single thread,and the accelerate ratio of the four processes reach 1.91. It also show that using the mature mathematical toolbox to development nonlinear finite element parallel program is feasible and effective.