摘要
为了提高薄壁金属管的耐撞性能,通过相似性分析,选择牛角作为生物原型。提取出决定牛角耐撞性能的结构特征参数,并应用到薄壁管的设计中,从而设计出一种具有牛角结构特征的仿生管。应用非线性有限元法对仿生管的变形模式和能量吸收进行了仿真分析,并与四晶胞锥管和普通圆锥管进行了对比,结果表明:在轴向碰撞时,仿生管的变形模式为渐进叠缩稳态变形,其比吸能为46.2kJ/kg,分别比四晶胞锥管和普通锥管的比吸能提高了1.3和1.8倍,仿生管的耐撞性能随着芯体壁厚的增加而提高;在横向碰撞时,与四晶胞锥管和普通圆锥管相比,仿生管具有较高的耐撞性能,其比吸能为10.4kJ/kg。将牛角结构特征应用到薄壁管的设计中,可以有效提高薄壁管的耐撞性能,为车辆吸能元件的研发提供参考。
In order to improve the crashworthiness performance of thin-wall tube,the oxhorn is taken as a biological prototype to analyze the similarity between oxhorn and thin-wall tube.The feature structures of the oxhorn against collision are extracted.These feature structures are applied to the design of bionic thin-wall tube.The nonlinear finite element method is used to study the deformation mode and energy-absorption properties of the bionic tube.The results show that the deformation mode of the bionic tube is asymptotic telescoping deformation.The specific energy-absorption of the bionic tube is 46.2kJ/kg,which is about 1.3times and 1.8times higher than the four cell conical tube and conical tube.The crashworthiness performance of the bionic tube improves as the thickness of the core increases.When the collision happens in transverse,the crashworthiness performance of the bionic tube is better than the four cell tube and general conical tube,and its specific energy absorption is 10.4kJ/kg.The crashworthiness performance of the bionic tube may provide reference for the design of energy-absorption components of vehicle.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2015年第6期1863-1868,共6页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(51305159)
中国博士后科学基金项目(2012M520676)
汽车安全与节能国家重点实验室开放基金项目(KF11211)
关键词
工程仿生学
牛角
仿生
比吸能
耐撞性
变形模式
engineering bionics
cow horn
bionic
specific energy absorption
crashworthiness
deformation mode
