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针对汽车碰撞这一大规模的冲击接触问题,尝试在机群环境下实现汽车碰撞过程的并行模拟。首先从冲击接触问题的有限元格式出发,分别讨论了显式内力计算和接触计算的并行算法,对接触计算分局部接触和大规模接触两种形式讨论了并行实现方案的异同,给出了在机群环境下冲击接触问题的并行计算程序详细流程。最后对某福特车型进行计算,计算结果和实验结果接近,且在8个结点机机群环境下,加速比可接近5.5。
Aiming at the large-scale impact problem of vehicle collision, this paper attempts to simulate the collision process of vehicles in a cluster environment. First of all, starting from the finite element format of the impact contact problem, the parallel algorithm of explicit internal force calculation and contact calculation are respectively discussed. The similarities and differences between parallel calculation of partial contact and large-scale contact are discussed. Cluster computing environment under the impact of contact problems detailed procedures for parallel computing. Finally, a Ford model is calculated, the calculation results and the experimental results are close, and in 8 node machine environment, the speedup can be close to 5.5.