基于多胞结构的车身前端轻量化和耐撞性设计*

doi:10.19562/j.chinasae.qcgc.2020.06.019

汽车工程 ›› 2020, Vol. 42 ›› Issue (6): 832-839.doi: 10.19562/j.chinasae.qcgc.2020.06.019

基于多胞结构的车身前端轻量化和耐撞性设计^*

贺良国¹, 赵杰¹, 谷先广²

1.合肥工业大学机械工程学院,合肥 230009;
2.合肥工业大学智能制造技术研究院,合肥 230009

收稿日期:2019-06-04 出版日期:2020-06-25 发布日期:2020-07-16
通讯作者: 谷先广,副教授,硕士生导师,E-mail:gxghfut@163.com
基金资助:
中国博士后面上基金项目(2018M640524)和中国博士后基金特别项目(2019T120460)资助

Lightweight and Crashworthiness Design of Vehicle BodyFront-end Based on Multi-cell Structure

He Liangguo¹, Zhao Jie¹, Gu Xianguang²

1. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009;
2. Intelligent Manufacturing Institute, Hefei University of Technology, Hefei 230009

Received:2019-06-04 Online:2020-06-25 Published:2020-07-16

摘要/Abstract

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。

关键词: 车身轻量化, 耐撞性, 多胞结构, 多目标优化

Abstract: 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

Key words: body lightweighting, crashworthiness, multi-cell structure, multi-objective optimization

贺良国, 赵杰, 谷先广. 基于多胞结构的车身前端轻量化和耐撞性设计^*[J]. 汽车工程, 2020, 42(6): 832-839.

He Liangguo, Zhao Jie, Gu Xianguang. Lightweight and Crashworthiness Design of Vehicle BodyFront-end Based on Multi-cell Structure[J]. Automotive Engineering, 2020, 42(6): 832-839.

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基于多胞结构的车身前端轻量化和耐撞性设计^*

Lightweight and Crashworthiness Design of Vehicle BodyFront-end Based on Multi-cell Structure

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