汽车碰撞过程的计算负载均衡并行有限元技术

Computational load balancing for parallel explicit finite element technology of vehicle impact

为了在有限的计算资源下挖掘更高的汽车碰撞仿真计算效率,基于当前普遍采用的并行处理区域分解算法,结合一个典型碰撞案例分析可知,汽车碰撞模型计算过程中的主要时间开销与结构大变形相关.提出基于坐标递归对分(Recursive Coordinate Bisection,RCB)的计算负载均衡区域分解算法,并将此法应用于某整车碰撞仿真模型的3类典型工况.计算结果表明此法能将并行计算效率提高10%~24%.

To improve the efficiency of simulation calculation of vehicle impact from the limited computational resources, based on the commonly used parallel processing domain decomposition algorithm,a typical impact case is analyzed,and the results show that the main time consumption of automobile impact simulaiton is correlated with the large deformation of structure. A domain decomposition algorithm for computational load is proposed on the basis of Recursive Coordinate Bisection（ RCB）. The method is applied in three typical cases of a vehicle impact simulation model,and the computational results show that the method is able to improve parallel computing efficiency by 10% to 24%.