薄壁管的横向吸能性能数值分析

Numerical Analysis of Lateral Energy Absorption of Thin Walled Tube

薄壁管的横向吸能性能是车辆被动安全保护结构设计需要考虑的重要问题。通过对不同结构类型的薄壁管结构进行数值模拟分析,为薄壁管结构横向吸能设计提供参考数据。计算结果表明,(1)管截面形状影响薄壁管的横向吸能行为,对比不同截面的横向吸能行为,97 mm×60 mm×50 mm尺寸的方管在撞击稳定性和吸能量方面具有较大优势;(2)预变形结构能够提高薄壁管在撞击过程中吸能稳定性,但无法提升吸能量;(3)排叠结构能够同时提升结构在撞击过程中的吸能稳定性和吸能量。

It is important to consider lateral energy absorption of thin walled tube in auto passive safety designing. This paper provides reference for lateral energy absorption design of thin walled tube via numerical analyzing various structure thin walled tube. The results showed, first tube cross section influent the lateral energy absorption of thin walled tube, compared with different section, square tube with size 97ram x 60minx 50ram impact stability and energy absorption, second, pre-deformation structure can improve the energy absorption stability in impacting process of the thin walled tube, not increase absorption capability, third, stacked structure can synchronously improve structure of energy absorption stability and energy absorption capability in crash.