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首页> 外文期刊>International Journal for Numerical Methods in Engineering >FINITE ELEMENT ALGORITHMS FOR DYNAMIC SIMULATIONS OF VISCOELASTIC COMPOSITE SHELL STRUCTURES USING CONJUGATED GRADIENT METHOD ON COARSE GRAINED AND MASSIVELY PARALLEL MACHINES
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FINITE ELEMENT ALGORITHMS FOR DYNAMIC SIMULATIONS OF VISCOELASTIC COMPOSITE SHELL STRUCTURES USING CONJUGATED GRADIENT METHOD ON COARSE GRAINED AND MASSIVELY PARALLEL MACHINES

机译：粗糙粒体-大型并联机床的粘弹性梯度复合有限元动态模拟的有限元算法

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摘要

Recently much attention has been paid to high-performance computing and the development of parallel computational strategies and numerical algorithms for large-scale problems. In this present study, a finite element procedure for the dynamic analyses of anisotropic viscoelastic composite shell structures by using degenerated 3-D elements has been studied on vector and coarse grained and massively parallel machines. CRAY hardware performance monitors such as Flowtrace and Perftrace tools are used to obtain performance data for subroutine program modules and specified code segments. The performances of conjugated gradient method, the Cray sparse matrix solver and the Feable solver are evaluated. SIMD and MIMD parallel implementation of the finite element algorithm for dynamic simulation of viscoelastic composite structures on the CM-5 is also presented. The performance studies have been conducted in order to evaluate efficiency of the numerical algorithm on this architecture versus vector processing CRAY systems. Parametric studies on the CM-5 as well as the CRAY system and benchmarks for various problem sizes are shown. The second study is to evaluate how effectively the finite element procedures for viscoelastic composite structures can be solved in the Single Instruction Multiple Data (SIMD) parallel environment. CM-FORTRAN is used. A conjugate gradient method is employed for the solution of systems. In the third study, we propose to implement the finite element algorithm in a scalable distributed parallel environment using a generic message passing library such as PVM. The code is portable to a range of current and future parallel machines. We also introduced the domain decomposition scheme to reduce the communication time. The parallel scalability of the dynamic viscoelastic finite element algorithm in data parallel and scalable distributed parallel environments is also discussed.
机译：最近，人们对高性能计算以及针对大规模问题的并行计算策略和数值算法的开发给予了极大的关注。在本研究中，已经在矢量，粗粒度和大规模并行机上研究了使用退化的3-D元素对各向异性粘弹性复合壳结构进行动力学分析的有限元程序。 CRAY硬件性能监视器（例如Flowtrace和Perftrace工具）用于获取子例程程序模块和指定代码段的性能数据。评估了共轭梯度法，Cray稀疏矩阵求解器和Feable求解器的性能。还提出了在粘弹性复合材料结构CM-5上进行动态模拟的有限元算法的SIMD和MIMD并行实现。为了评估数值算法在此体系结构与矢量处理CRAY系统之间的效率，已经进行了性能研究。显示了对CM-5以及CRAY系统的参数研究以及各种问题大小的基准。第二项研究是评估在单指令多数据（SIMD）并行环境中如何有效解决粘弹性复合结构的有限元程序。使用CM-FORTRAN。共轭梯度法用于系统求解。在第三项研究中，我们建议使用通用消息传递库（例如PVM）在可扩展的分布式并行环境中实现有限元算法。该代码可移植到一系列当前和将来的并行机中。我们还介绍了域分解方案以减少通信时间。还讨论了动态粘弹性有限元算法在数据并行和可伸缩分布式并行环境中的并行可伸缩性。

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