Abstract:A systemic investigation was done for the improvement of the crashworthiness of an automobile front rail structure, that was a S-shaped thin-walled beam with square section, by introducing inducting grooves and stiffeners, as well as by realizing lightweight design based on material properties.Eight finite element models were established according to the position distribution, number of inducting grooves and the position distribution of stiffeners.Considering the total mass as a constraint condition and geometrical parameters as design variables, the crashworthiness optimization design of the S-shaped thin-walled beam with stiffeners was carried out based on high precision surrogate models.The validity of the optimization model was verified by the comparison between simulated and theoretical force-displacement curves.The material of the stiffeners was changed to magnesium-aluminum alloy to realize lightweight design.The results provide a novel strategy for crashworthiness optimization and lightweight design of thin-walled beam structures.
樊璐璐,吉野辰萌,林烨,刘欢,于征磊. 基于结构与材料参数的S形薄壁梁抗撞性与轻量化研究[J]. 振动与冲击, 2018, 37(18): 115-120.
FAN Lulu,YOSHINO Tatsuo,LIN Ye,LIU Huan,YU Zhenglei. Crashworthiness and lightweight design of a S-shaped thin-walled beam based on the modification of structure and material parameters. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(18): 115-120.
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