结构动力学有限元混合分层并行计算方法  

HYBRID HIERARCHICAL PARALLEL ALGORITHMS FOR STRUCTURE DYNAMIC ANALYSIS

作　　者：喻高远 李俊杰 楼云锋[1,2,3] 金先龙 YU Gao-yuan;LI Jun-jie;LOU Yun-feng;JIN Xian-long(State Key Laboratory of Mechanical System and Vibration,Shanghai Jiao Tong University,Shanghai 200240,China;School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Aerospace System Engineering Shanghai,Shanghai 201108,China)

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240 [2]上海交通大学机械与动力工程学院,上海200240 [3]上海宇航系统工程研究所,上海201108

出　　处：《工程力学》2024年第9期1-8,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(11772192)。

摘　　要：为减小利用异构众核分布式存储计算机并行求解大规模、超大规模系统结构动力学有限元问题对计算效率造成的损失,在区域分解法的基础上,提出了一种结构动力学有限元混合分层并行计算方法。在该方法中,引入计算过程数据的分布式存储提升数据的内存访问效率。为了弥补传统区域分解法界面方程规模随子区域增加造成通信开销增加的缺点,采用基于网格区域和求解算法区域的混合并行分区,从而降低界面方程的规模,大幅度减少界面方程的求解时间。利用计算过程的三层并行实现计算节点间通信、异构群组间通信与异构群组内通信分离,从而有效提高了通信效率。因此,该方法能够充分利用国产异构众核分布式存储计算机的体系结构特点提升大规模、超大规模系统结构动力学并行计算效率。通过对基准实例的求解,验证了该计算方法的有效性和优越性。To reduce the parallel efficiency degradation of the system dynamic analysis on an entire large structure caused by the heterogeneous multi-core and distributed memory parallel computers,a hybrid hierarchical parallel algorithm for structure dynamic analysis is proposed on the basis of distributed domain solver.In this algorithm,the distributed storage of large amount of data is introduced to improve the memory access.To make up for the shortcoming that the communication cost increases with increase of the interface equation size when using the traditional distributed domain solver,a hybrid partitioning based on distributed domain solver and parallel solver is introduced to reduce the interface equation size and further reduce the solution time.Moreover,a three-layer parallelization of the computational procedure is introduced to enable the separation of the communication of inter-node,heterogeneous core groups and inside-heterogeneous core-groups,which can significantly improve the communication rate.Thus,it can improve the efficiency rates of parallel computing of large-scale dynamic analysis by fully exploiting the architecture characteristics of the heterogeneous multi-core and distributed memory parallel computers.By solving benchmark instances,the effectiveness and superiority of the proposed method are proved.

关 键 词：异构众核 分布式存储 区域分解 混合并行 缩聚 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论] O246[自动化与计算机技术—计算机科学与技术]