一种新型并行化有限元结构模态分析集成系统

以成熟有限元软件的模态分析流程和大型稀疏矩阵特征值的并行求解为基础,开发出一种基于大规模并行机的新型有限元结构模态分析系统。通过对串行CAE软件的二次开发,将模态分析过程中计算量最大的特征值求解部分代之以并行计算。针对并行机特性以隐式重启动Lanczos算法为基础,编写了基于MPI的特征值并行求解程序,并通过实际算例验证了并行程序的加速比和扩展性;同时实现并行程序与其它串行分析步骤的无缝集成,使集成系统的界面友好,操作方便。本系统使结构模态分析的规模和速度大幅度提高,以大型CAE软件MSC／NASTRAN为并行化求解器开发平台,在“神威Ⅰ”超级计算机上验证了其可行性和高效性。

A new parallel integration system of finite element model analysis

On the basis of research for model analysis of advanced finite element software and parallel methods for eigenvalue calculations of large scale sparse matrix, a new parallel model analysis system was provided. By means of second development to the CAE software, the serial method for eigenvalue was replaced by parallel computing. By research for Implicit Restarted Lanczos method, parallel programming based on MPI was compiled, and its speed-up and extension were tested by examples, the same time seamless integration with serial sections was implemented, which made the interface friendly and convenient. The velocity and dimensions of model analysis can be improved greatly. The parallel system took CAE software MSC/NASTRAN as development flat, and its feasibility and efficiency were tested on the supercomputer "Shen Wei I".