摘要
利用响应面法对非承载式车身的前车架进行零件厚度的优化,在限制加速度最大峰值及总质量的情况下最大化吸收动能。针对零件数目较多的情况,采用两步构造响应面进行变量筛选、优化的方法,首先对所有零件构造较为粗糙的响应面模型,用以筛选出关键零件及非关键零件;然后对关键零件构造较为精细的响应面,在此基础上对其进行尺寸优化。对加速度采用径向基函数(radial based function,RBF)响应面,有效提高响应面的精度。采用正交设计和均匀设计的方法选取试验点,能用较少的试验点构造出满足要求的响应面。结果表明,该方法对汽车车架的耐撞性能优化具有明显的效果,同时计算代价较低。
Response surface methodology(RSM) is applied to improve crashworthiness of automobile frame.The object was to maximize the absorbed energy by the frame,while the peak acceleration and total mass of the frame were chosen as the constraints.Considering that there are substantial parts in frame,a two-stage method was proposed.First,a coarse response surface model base on all parts was built to screen out the significant parts.Then refined response surface model for the significant parts was constructed and use...
出处
《机械强度》
CAS
CSCD
北大核心
2010年第5期754-759,共6页
Journal of Mechanical Strength
基金
国家科技支撑计划资助项目(2006BAF02A02)~~
关键词
耐撞性
响应面法
径向基函数
试验设计
Crashworthiness
Response surface methodology
Radial based function
Design of experiment
