基于大规模并行计算机的金属基结构材料高温失效预测

J. Hadian , Y. Mirvis , B. Nour-Omid , P. Murthy , S. Nakazawa
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引用次数: 1

摘要

下一代航空航天系统的大规模高速设计和分析是通过关注概率数学、结构/材料力学和并行计算的计算集成和同步来实现的。数学模型需要多层次的交互分析,并利用耗时的收敛标准,进一步推动计算和设计成本的上升,这推动了设计成本的上升。为了减少CPU时间和内存限制,引入了一种有效的实时并行化(RTP)解决方案。RIP (Recursive Internal Partitioning)用于将整个域划分为子域,并将一个或多个子域分配给每个独立的处理器。实现了Alpha STAR多正面算法(AMF),对所有有限元节点的未知数进行集合、压缩和求解。采用多层次优化技术,加快了多领域专业分析技术和数学模型的仿真处理速度。这些模型需要分层的多层交互分析,利用耗时的收敛。采用通用高速民用交通(hsct)模型验证了该模型的大规模计算能力。多准则优化结果表明,计算时间减少了一个数量级。讨论了数值解和物理现象,并对未来的解决方案提出了建议。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Prediction of high temperature metal matrix structural material failure using a massively parallel computer

Large scale high speed design and analysis of next generation aerospace systems is achieved by focusing on the computational integration and synchronization of probabilistic mathematics, structural/material mechanics, and parallel computing. Design costs have been driven upward by mathematical models that require multiple levels of interactive analysis and utilize time consuming convergence criteria that further drive computing and design costs upward. To reduce CPU time and memory limitations, an effective real time parallelization (RTP) of the solution is introduced. Recursive Internal Partitioning (RIP) is used to partition the entire domain into subdomains with one or more subdomains being assigned to each independent processor. The Alpha STAR multifrontal algorithm (AMF) is implemented to assemble, condense, and solve for the unknowns at all finite element nodes. A multi level optimization technique is utilized to speed up the simulation processing time of the diversified field of specialized analysis techniques and mathematical models. These models require hierarchical multiple levels of interactive analysis utilizing time consuming convergence. The generic high speed civil transport (hsct) model is used to demonstrate the large scale computing capability. Results of multicriteria optimization indicate an order of magnitude reduction in computing time. Numerical solutions as well as physical phenomena are discussed and recommendations are provided for future solutions.

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