Parallel Computing of Large Eigenvalue Problems for Engineering Structures

Xuanhua Fan, Rui-an Wu, Pu Chen, Zuogui Ning, J. Li
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Abstract

Aimed at large, sparse eigenvalue problems in modal analysis of engineering structures, some predominant algorithms and their corresponding software packages are summarized. A parallel solving system was constructed via integrating these software packages into the finite-element parallel computing framework-PANDA. The finite element model (FEM) of engineering structures was built in pre-processing commercial software-MSC. Patran. Based on the interface between PANDA and MSC. Patran, the model information was translated in PANDA to generate stiffness and mass matrices in a parallel way. Utilizing these matrices, a large-scale parallel computing of eigenvalues was carried out via calling software packages in PANDA. The numerical results show that PANDA frame is competent for carrying out large-scale parallel computing of eigenvalue problems; in virtue of supercomputer, the computing scale attains millions of freedom degrees; and the parallel efficiency is favorable.
工程结构大特征值问题的并行计算
针对工程结构模态分析中存在的大而稀疏的特征值问题,综述了几种主要算法及其相应的软件包。将这些软件包集成到有限元并行计算框架panda中,构建了一个并行求解系统。在商用软件msc中建立工程结构的有限元模型。Patran。基于PANDA和MSC之间的接口。然后,将模型信息在PANDA中进行转换,以并行方式生成刚度和质量矩阵。利用这些矩阵,通过调用PANDA中的软件包进行特征值的大规模并行计算。数值结果表明,PANDA框架能够进行特征值问题的大规模并行计算;借助于超级计算机,计算规模达到百万自由度;并且并行效率是有利的。
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