现代运载工具碰撞仿真的CPU/GPU异构并行计算方法研究

碰撞仿真是现代运载工具碰撞安全性设计中的核心技术，复杂的非线性计算特征使得计算效率直接决定了碰撞仿真在现代设计流程中的应用水平。本项目面向CPU/GPU异构计算平台，构建适用于大规模碰撞仿真应用的混合异构计算模型，并结合实际工程需求，系统性地研究板壳结构非线性分析和接触计算全流程GPU并行的混合精度计算方法。进一步，与粗粒度并行计算方法深度耦合，形成高集成度的碰撞仿真异构并行计算方法。具体需要突破效率与精度兼顾的GPU混合精度计算方法、显式有限元的精细化GPU并行计算方法、接触计算的完全局部化及其细粒度并行计算方法等难点。本项目基于天河一号对并行算法进行系统集成，形成自主碰撞仿真软件，并通过整车碰撞和列车追尾的仿真计算以及与商业软件的对标分析，实现对算法和软件的验证与改进。本项目的完成将为碰撞仿真分析提供一种自主的高性能绿色计算手段，从而提升我国现代运载工具的自主研发能力。

Crashworthiness simulation is recognized as one of the most important technologies in the design of safety of modern vehicles. The applicability of the crashworthiness simulation is solely dependent on the calculation efficiency, considering that the complex nonlinear calculation is present. This project is intended to construct a hybrid heterogeneous computing model for large-scale crashworthiness simulation applications, on the basis of CPU/GPU heterogeneous computing platforms. Meanwhile, in line with the engineering requirements, this project aims at establishing a whole process GPU-based parallel hybrid precision calculation method for nonlinear analysis of plate and shell structures and contact calculation. Subsequently, integrating the coarse-grained parallel computing method enables a highly integrated heterogeneous parallel computing method. Hence, the major research includes the hybrid precision calculation method on GPU, the fine GPU parallel computing method of explicit finite element method, and the localized fine-grained parallel computing method of contact calculation, respectively. Finally, an autonomous crashworthiness simulation software is developed in Tianhe-1A, while the simulation studies of vehicle crashworthiness and train crashworthiness are carried out. The completion of this project will provide an independent, high-performance, and green computing solution for crashworthiness analysis. In addition, the research outcomes will significantly facilitate the independent research and design of modern vehicles.