S形梁碰撞多参数优化设计.pdf

26 12 Vol1 26 o1 12 2009 12 Journal of Highway andTransportation Research and Development Dec1 2009 : 1002O0268 (2009) 12O0131O06 S 1 2 1 武和全, 辛 勇, 胡宏伟 ( 11 , 410004; 21 , 330031) : 提出了一种新的碰撞优化方法, 即将试验设计 ( DOE)有限元分析 ( FEA) 响应面法 ( RSM) 和遗传算法 ( GA) 合起来, 对S 形薄壁梁多 构参数进行抗撞性优化设计通过提取实际车架上使用的S 梁特征参数, 建立了 S 梁的碰撞模型运用方差分析 (A OVA) , 选取那些对S 梁吸能特性影响显著的因素作为主要设计变量, 采用显式 非线性有限元软件PAMOCRASH 进行碰撞模拟根据有限元分析 果并 合响应面理论, 建立了S 梁的总吸能和最大 冲击载荷的响应面模型采用遗传算法进行优化求解, 得到了S 梁的最优设计参数优化后的S 梁在碰撞中的总吸能 能力大大提高 : 汽车工程; 抗撞性分析; 响应面法; S 梁; 遗传算法; 优化设计 : O34713; U461 : A Parameters Optimization of SOshaped Rail for Crashworthiness Analysis 1 2 1 WU Hequan , XI Yong , HU Hongwei ( 11 School of Automotive and Mechanical Engineering, Changsha University of Science and Technology, Changsha Hunan 410004, China; 21 School of Mechanical and Electrical Engineering, anchang University, anchang Jiangxi 330031, China) Abstract: An SOrail impact modelwas established based on theparameters extracted from atruerailused in vehicle frame1 An optimum crashworthiness design method was presented and utilized to obtain parameters of the SOshaped rail structures1 Themethodology adopted in this researchmadeuse of design of experiments (DOE) , finite element analysis (FEA) , response surfacemethod (RSM) and genetic algorithm (GA) 1 Parameters that have remarkable influence on energy absorption were determined as model variables for design based on analysis of variance