摘要
以帽形截面薄壁梁为例,研究了焊点布局对薄壁梁结构轴向耐撞性的影响。建立了精度较高的用于分析薄壁梁结构轴向耐撞性的有限元模型,提出了考虑焊点影响的帽形截面薄壁梁在轴向冲击载荷作用下的平均碰撞力的解析解,并以薄壁梁结构的轴向平均碰撞力和弯曲刚度为约束条件,对一帽形截面薄壁梁进行了轻量化设计,大幅提高了优化设计的效率。讨论了一些重要参数(如截面形状、材料性能、载荷形式等)对薄壁梁结构轴向耐撞性能的影响。
For crashworthiness design of thin-walled tubes, much attention has been given to the size and shape design of the cross-section, while limited studies have been performed to incorporate spot weld modeling into the design. This study focused on the influence of the spot weld layout on the axial crashworthiness of thin-walled tubes. A finite element model was constructed to analyze the thin-walled tube subject to an axial crushing fbrce. A modified theoretical analysis was proposed for the lightweight design of the thin-walled tube with the constraints of the required mean crushing force and bending stiffness. Some parameters influencing the axial crashworthiness were discussed.
出处
《汽车工程学报》
2015年第6期391-397,共7页
Chinese Journal of Automotive Engineering
基金
国家高技术研究发展计划(863计划)(2006AA110103)
关键词
轻量化设计
薄壁梁
轴向耐撞性
平均碰撞力
lightweight design
thin-walled tube
axial crashworthiness
mean crushing force
