梯度吸能盒耐撞性研究
Research on crashworthiness of gradient energy-absorption box
周志宏 1马娇 1彭金艳 1康睿超 1杨胜兵2
作者信息
- 1. 湖南三一工业职业技术学院工程机械学院,湖南 长沙 410129
- 2. 武汉理工大学 汽车学院,湖北 武汉 430070
- 折叠
摘要
为了提升车辆吸能盒的耐撞性,设计了厚度梯度、材料梯度及材料厚度双梯度变化的吸能盒.建立了吸能盒的有限元模型,采用非线性动力学有限元分析软件LS-DYNA进行仿真分析,并通过试验验证了有限元模型的可靠性.结果表明:厚度对耐撞性的影响较大.与匀质吸能盒相比,最优的厚度梯度吸能盒的比吸能(SEA)提高了 53.37％,而其初始峰值力(PCF)仅增大了 4.08％.提出两种双变梯度吸能盒,与匀质吸能盒相比,最优双变梯度吸能盒的SEA值提升了 143.18％,但是其PCF值仅仅增大了 3.9％.
Abstract
In this article,in order to improve the vehicle energy-absorbing box's crashworthiness,efforts are made to design a gradient energy-absorbing box with thickness gradient,material gradient and double-variable gradient of material and thickness.The energy-absorbing box's finite element(FE)model is set up,then,the model is simulated and analyzed with the help of the nonlinear dynamics FE analytical software LS-DYNA,and it is verified that this FE model is reliable through a series of experi-ment.The results show that the energy-absorbing box's thickness has large influence on its crashworthiness.Compared with the homogeneous energy-absorbing box,the optimal thickness-gradient energy-absorbing box improves the specific energy absorption(SEA)by 53.37％,while its initial peak force(PCF)improves by only 4.08％.Next,two double-variable gradient energy-ab-sorbing boxes are proposed.Compared with the homogeneous energy-absorbing box,the optimal double-variable gradient energy-absorbing box has a 143.18％increase in SEA,but PCF increases by merely 3.9％.
关键词
吸能盒/非线性有限元/双变梯度/耐撞性能/变形模式Key words
energy-absorbing box/nonlinear finite element/double variable gradient/crashworthiness/deformation mode引用本文复制引用
出版年
2024
NETL
NSTL
万方数据