航天器着陆碰撞动力学CUDA并行计算技术  

Parallel Computing Technique of Dynamics Based on CUDA for Spacecraft Landing Impact

作　　者：高树义[1] 谷良贤[1] 张方[2] 陈国平[2] 李杨[2] 

机构地区：[1]西北工业大学航天飞行动力学技术重点实验室,西安710072 [2]南京航空航天大学机械结构力学及控制国家重点实验室,南京210016

出　　处：《航天器工程》2014年第1期25-31,共7页Spacecraft Engineering

基　　金：国家自然科学基金项目(51305197)

摘　　要：航天器着陆接触碰撞过程中的瞬态响应计算,涉及到几何非线性、接触非线性和材料非线性,计算过程复杂,计算量大。为此,文章将统一计算架构(CUDA)技术应用到接触碰撞问题的并行显式积分计算,研究了质量矩阵和刚度矩阵的并行生成方法,并将基于中心差分法的求解过程并行化实施。仿真算例表明:并行算法计算结果准确,较大地提高了计算仿真分析的效率,可为航天器着陆过程中冲击动力学计算的快速和高精度实现奠定基础。The transient response calculation for spacecraft landing relates to the geometric non- linearity, contact nonlinearity and material nonlinearity, so it is a problem related to a complicated calculation process with a large amount of calculation. This paper uses CUDA technology to solve the parallel explicit integral calculation, researches the parallel generation method of the mass matrix and stiffness matrix, and makes parallel implementation of a central difference method. Simulation examples show that the parallel computing can improve calculation efficiency greatly and lay the foundation to achieve fast and highly precise calculation for shock dynamics in space- craft landing process.

关 键 词：航天器着陆 并行计算 中心差分法 

分 类 号：V415[航空宇航科学与技术—航空宇航推进理论与工程]