汽车碰撞过程并行有限元仿真技术

根据显式有限元的计算特点和神威超级计算机的体系结构,设计了基于消息传递和区域分割的动态显式有 限元的并行算法,给出了基于汽车结构和材料特征的并行化分区算法,提出的算法应用在自行开发的GEFEP-P汽 车碰撞的并行化有限元分析软件,并成功移植到神威Ⅰ超级计算机。算例计算结果表明:采用并行有限元计算,可 以大大提高汽车碰撞过程的仿真计算效率。

Parallel explicit finite element simulation of vehicle collisions

Explicit finite element analysis of contact-impact problems on parallel computers with distributed memory is concerned. Subject to the characteristics of finite element method and the structure of supercomputer, a parallel algorithm is designed for explicit finite element method based on message passing and domain decomposition. A new domain decomposition method based on the element type and material model is specially presented for parallelization of explicit finite element simulation of crashworthiness. The algorithms have been implemented in the GEFEP-P software, a self-developed program for simulation of crashworthiness, on the Shengwei supercomputer. Numerical example shows that parallel computation improve the efficiency of simulation rapidly.