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

Abstract

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

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

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