机群环境下汽车碰撞的并行模拟

Simulation of automobile crashworthiness using clustered parallel computers

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。

Automobile crashworthiness involving large scale contactimpact computations were simulated using a parallel algorithm implemented in a cluster environment. The finite element formulas for the contactimpact analysis were implemented in parallel algorithms to calculate the internal forces and the contact process, where local contact and arbitrary contact have different parallel implementations. A flowchart is given describing the parallel implementation in the cluster environment. The numerical results agree well with clush results for a Ford car. The speedup was approximately 5.5 in a cluster with 8 nodes.