锻压技术

肋板对吸能构件耐撞性的影响及优化设计

英文标题：Influence of ribs on impact resistance for energy-absorbing components and optimal design

作者：马箫苗诗梦

单位：沈阳航空航天大学

分类号：O342

出版年,卷(期):页码：2023,48(5):314-320

摘要：

为了提高单胞薄壁吸能构件的耐撞性，设计了外接附加肋板的单胞薄壁吸能构件，并且研究了肋板形状对构件的耐撞性的影响。首先，基于ABAQUS的动力显示分析，模拟了不同肋板形状的铝合金薄壁圆管在轴向压缩下的吸能特性及破坏模式，发现外加三角形肋板的吸能构件的破坏模式稳定、吸能高。然后，利用响应面模型对吸能构件进行了优化，并提出了评价吸能构件耐撞性的新指标——耐撞性指数P。结果表明：优化后的吸能构件的基础单元圆管厚度为2.07 mm，三角形肋板厚度为0.98 mm，耐撞性指数P较优化前提高了9.5%，此时构件的比吸能和平均承载力分别为47542.1 kJ·g-1和12760.300 kJ。

In order to improve the impact resistance of single-cell thin-walled energy-absorbing component, a single-cell thin-wall energy-absorbing component with external additional ribs was designed, and the influence of rib shape on the impact resistance of component was investigated. Firstly, based on the ABAQUS dynamic display analysis, the energy absorption characteristics and damage modes of aluminum alloy thin-walled circular tubes with different rib shapes under axial compression were simulated. And the results show that the amage mode model of the energy-absorbing component with external additional triangular ribs is stable and the energy absorption is high. Then, the energy-absorbing component was optimized by the response surface model, and a new index for evaluating the impact resistance of the energy-absorbing component of impact resistance index P was proposed. The results show that after optimization, the thickness of circular tube for the base unit of the energy-absorbing component is 2.07 mm, the thickness of the triangular rib is 0.98 mm, the impact resistance index P is increased by 9.5% compared with that before optimization. At this time, the specific energy absorption and the average bearing capacity of component are 47542.1 kJ·g-1 and 12760.300 kJ, respectively.

基金项目：

校引进人才科研启动基金项目（19YB18）

作者简介：马箫（1987-），女，博士，讲师,E-mail：540721373@qq.com;通信作者：苗诗梦（1996-），女，硕士研究生,E-mail：2050598542@qq.com

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