摘要
对单胞、方孔多胞及蜂窝多胞三种薄壁梁进行了不同碰撞形式的仿真计算;利用台车碰撞试验台对蜂窝铝与方管铝薄壁梁结构的变形模式和变形量进行分析。结果显示,在相同的初始碰撞动能情况下,方孔多胞结构的压溃量最小,且以叠缩压溃的稳定变形模式进行;而在压溃量相同时,方孔多胞结构的吸能量最大,碰撞过程的材料利用率最高,其碰撞力峰值与均值差别最小。因此,方孔多胞薄壁梁应用于车身结构可以显著提高车辆的耐撞性能。
The crashworthiness of three kinds of thin walled beams was carried out by simulation analysis in different collision forms, which were unicellular,square-hole multi-cell and honeycomb multi-cell. The deformation mode and compression amount of aluminum honeycomb and square tube were analyzed through trolley collision experiment. The results showed that, in the case of the same initial collision kinetic energy, the compression amount of square-hole polytope is the smallest, and the folding crush in a stable deformation mode; while in the case of the same amount of compression, energy absorbed by square-hole polytope is the maximum, and its material utilization rate is the highest, while the difference between the peak value and mean value of impact force is the smallest. Therefore, the square-hole polytope thin walled beam used on auto- body structure can improve the vehicle crashworthiness significantly.
出处
《机械设计与制造》
北大核心
2014年第12期209-211,共3页
Machinery Design & Manufacture
基金
国家"十二五"科技支撑计划项目-乘用车轻量化综合优化技术研究资助(2011BAG03B02)
关键词
铝合金吸能
多胞结构
台车实验
耐撞性
Aluminum Alloy
Energy Absorption
Multi-Cell Structure
Trolley Experiment
Crashworthiness
