摘要
为了解决汽车前纵梁碰撞时峰值碰撞力和吸能量之间的矛盾,通过对前纵梁前端使用铝合金、后端使用高强度钢板,提出了一种钢铝混合前纵梁结构.以纵梁两端所用材料类型及厚度为组合变量,建立了该结构轻量化和耐撞性多目标优化问题的数学模型,并对多项式、Kriging和径向基函数(RBF)3种常用近似模型解决该特定问题的适用性进行了研究.结果表明,RBF更适合作为近似模型解决材料类型和板厚的组合优化问题,且优化后的前纵梁结构能在改善耐撞性的同时,显著提高轻量化水平.
In order to solve the conflict between the peak collision force and the total absorbed energy of vehicle＇ s front rail during collision, a new type of steel-aluminum hybrid structure is presented, in which aluminum alloy and advanced high-strength steel （AHSS） are respectively used for the front and the back parts. Then, by taking the material type and the sheet thickness as the variables, a mathematical model for the multi-objective optimization in terms of lightweight and crashworthiness is established, and the feasibility and applicability of such three approximate methods as the polynomial, the Kriging and the radial basis function （RBF） in solving the combinational optimization problem are investigated. The results show that RBF is more suitable for the combinational optimization concerning material type and sheet thickness, and that the use of steel-aluminum hybrid materials remarkably improves the crashworthiness and lightweight of front rails.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第7期90-94,共5页
Journal of South China University of Technology(Natural Science Edition)
基金
国家科技支撑计划项目(2011BAG03B02)
华南理工大学中央高校基本科研业务费专项资金资助项目(2009ZZ0002)
关键词
汽车前纵梁
钢铝混合梁
耐撞性
近似模型
多目标优化
automotive front rail
steel-aluminum hybrid rail
crashworthiness
approximate model
multi-objec- tive optimization
