基于响应面法某轿车后纵梁支架结构优化  

Structural Optimization Based on Response Surface Methodology for Longitudinal Beam Support

作　　者：魏然[1] 王显会[1] 路先锋[1] 吴旭[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《机械工程与自动化》2013年第1期89-91,共3页Mechanical Engineering & Automation

摘　　要：针对某轿车追尾碰撞试验中后纵梁支架的耐撞性优化问题,运用中心复合试验方法合理分布试验点,并结合最小二乘法建立了以三对吸能槽位置为形状变量的刚性墙最大位移、撞击力峰值的响应面模型。采用遗传优化算法对响应面模型进行了优化计算。结果表明,在不影响后纵梁总成和车身其他结构的条件下,优化后的后纵梁支架有较好的吸能槽位置排布,其耐撞性有了显著提升。该优化方法能用较小的计算成本来有效预测和指导工程实践中产品的耐撞性设计,在车身结构和汽车零部件的耐撞性设计中具有一定的实用与推广价值。The support of longitudinal beam is chosen as a subject to be analyzed for the crashworthiness optimal problem of auto body part during rear-end collision. The center composite experimental design and least square method are combined to construct the response surface model of the maximum displacement and crash peak force for rigid wall with 3 pairs shape variables about the location of energy absorbing notches. Genetic algorithm is applied to optimize the approximation function built by response surface methodology. The result demonstrates the crashworthiness of longitudinal beam support could be improved through the optimization of location of energy absorbing notches.

关 键 词：追尾碰撞 结构优化 响应面法 后纵梁支架 

分 类 号：U463.326[机械工程—车辆工程]