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针对碰撞安全的结构耐撞性要求,以圆管液压胀形和液压折叠原理为基础,对双直径圆管能量吸收元件进行了成形工艺设计;利用SPSS18.0对管材液压成形的各参数组合进行了正交设计,在ABAQUS中进行成形过程数值模拟,得出了最优参数组合,并分析了影响吸能元件成形厚度分布的主要因素;最后进行了碰撞仿真研究。结果表明,双直径圆管能量吸收元件变形模式稳定、比耗能高、载荷平稳,是理想的吸能元件。
In order to meet the crashworthiness requirements of crash safety, the forming process of energy absorbing element with double diameter circular tube was designed based on the principle of hydraulic bulging and hydraulic folding of the pipe. The parameters of the hydroforming of pipe material were determined by SPSS18.0 The orthogonal design was used to simulate the forming process in ABAQUS. The optimal parameter combination was obtained and the main factors influencing the forming thickness distribution of energy absorbing element were analyzed. Finally, the crash simulation was carried out. The results show that the deformation mode of double-diameter circular tube energy-absorbing element is stable, higher than energy consumption and stable load, which is an ideal energy-absorbing element.