摘要
为满足车身轻量化和耐撞性设计的要求,采用材料替换与结构改进相结合的方法对前端进行优化。基于试验验证的整车正面碰撞模型,建立了铝制前端模型并与钢制设计方案进行了耐撞性对比。为提高铝制前端耐撞性能,设计了不同胞数的多胞构型截面,并在三点弯曲和轴向压溃工况下分析其吸能特性。运用多目标优化方法对多胞前端的结构参数进行寻优。结果表明,优化后的铝制多胞结构能在改善整车耐撞性的同时,显著减轻前端质量。
In order to meet the requirements of lightweight and crashworthiness of vehicle body,its front-end is optimized by combining material replacement with structural improvement.Based on the vehicle frontal crash model verified by test,an aluminum front-end model is established with its crashworthiness compared with steel counterpart.For enhancing the crashworthiness of aluminum front-end,various multi-cell cross sections with different cell numbers are designed,and their energy absorption characteristics are analyzed under three-point bending and axial crushing conditions.A multi-objective optimization scheme is used to optimize the parameters of multi-cell front end structure.The results show that the aluminum multi-cell structure optimized can improve vehicle crashworthiness while significantly reducing the mass of front-end.
作者
贺良国
赵杰
谷先广
He Liangguo;Zhao Jie;Gu Xianguang(School of Mechanical Engineering,Hefei University of Technology,Hefei 230009;Intelligent Manufacturing Institute,Hefei University of Technology,Hefei 230009)
出处
《汽车工程》
EI
CSCD
北大核心
2020年第6期832-839,846,共9页
Automotive Engineering
基金
中国博士后面上基金项目(2018M640524)
中国博士后基金特别项目(2019T120460)资助。
关键词
车身轻量化
耐撞性
多胞结构
多目标优化
body lightweighting
crashworthiness
multi-cell structure
multi-objective optimization
