结构非线性动力分析混合时间积分并行算法

MIXED TIME INTEGRATION PARALLEL ALGORITHM FOR STRUCTURAL NONLINEAR

  • 摘要: 合隐式和显式时间积分技术,对结构非线性动力反应分析提出一种并行混合时间积分算法. 该算法采用区域分解技术. 将并发性引入到算法中,即利用显式时间积分技术进行界面节点积分而利用隐式算法求解局部子区域. 为实现并行混合时间积分算法,设计了灵活的并行数据信息流. 编写了该算法的程序,在工作站机群实现了数值算例,验证了算法的精度和性能. 计算结果表明该算法具有良好的并行性能,优于隐式算法.

     

    Abstract: The mixed time integration parallel algorithm forstructural nonlinear dynamic analysis is proposed, which combines theimplicit and explicit time integration techniques. The parallel algorithmwith mixed time integration technique is implemented with domaindecomposition. Concurrency is introduced into this algorithm by integratinginterface nodes with the explicit time integration technique and solving localsubdomains with an implicit algorithm. A flexible parallel data structure isdesigned to implement the parallel mixed time integration algorithm. Acomputer program is developed with messaging interfaceas the software development environment. Numerical example is implemented tovalidate the performance of the parallel algorithm. It is shown that the proposed algorithm is better in performance than theimplicit algorithm.

     

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