| 基于多胞结构的车身前端轻量化和耐撞性设计 |
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| 引用本文： | 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):832-839,846. |
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| 作者姓名： | 贺良国 赵杰 谷先广 |
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| 作者单位： | 合肥工业大学机械工程学院,合肥230009;合肥工业大学智能制造技术研究院,合肥230009 |
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| 基金项目： | 中国博士后科学基金面上项目;中国博士后科学基金特别资助项目 |
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| 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。
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| 关 键 词： | 车身轻量化 耐撞性 多胞结构 多目标优化 |
Lightweight and Crashworthiness Design of Vehicle Body Front-end Based on Multi-cell Structure |
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| He Liangguo,Zhao Jie,Gu Xianguang.Lightweight and Crashworthiness Design of Vehicle Body Front-end Based on Multi-cell Structure[J].Automotive Engineering,2020,42(6):832-839,846. |
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| Authors: | He Liangguo Zhao Jie Gu Xianguang |
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| Institution: | (School of Mechanical Engineering,Hefei University of Technology,Hefei 230009;Intelligent Manufacturing Institute,Hefei University of Technology,Hefei 230009) |
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| 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. |
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| Keywords: | body lightweighting crashworthiness multi-cell structure multi-objective optimization |
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