摘要
在金属薄壁圆管(原模型)上设置圆弧形凸槽诱导结构并以其为研究对象,建立以凸槽个数及其半径为设计变量,以比吸能(SEA)最大化和最大峰值碰撞力(MaxF)最小化的多目标优化模型。在保证不影响薄壁构件吸能能力的情况下,通过对其结构的优化达到最大峰值碰撞力最小化的目的。采用有限元软件LS-DYNA得到不同几何参数模型的碰撞信息,结合径向基函数法构造近似函数,并采用理想点法求解多目标优化问题。分析了凸槽个数和半径对薄壁构件的比吸能和最大峰值碰撞力的影响,得到了理想的优化模型,为进一步研究实际吸能元件奠定基础。
Abstract： A metal thin-walled tube with induced convex grooves was taken as a study object. The maximization of its specific energy absorption （ SEA）, and the minimization of its maximum peak impact force （MaxF） were adopted to form a multiobjective optimal model, the number and the radius of convex grooves were chosen as design variables. The optimization was conducted based on the minimization of MaxF and the maximization of SEA. The objective functions were constructed based on the radial basis functions （ RBFs）, the multiobjective optimization for the metal thin-walled tube with induced convex grooves was performed by using the ideal point method, and considering the impact of the number and the radius of convex grooves on the SEA and MaxF. At last, the ideal optimal model was obtained. The results laid a foundation for further studying practical energy-absorbing elements.
出处
《振动与冲击》
EI
CSCD
北大核心
2013年第21期80-84,共5页
Journal of Vibration and Shock
基金
国家自然科学基金项目(50975121)
吉林省科技发展计划项目(201101030)
一汽集团科技创新项目(1332)
关键词
薄壁构件
比吸能
最大峰值碰撞力
优化设计
圆弧形凸槽
thin-walled tube
specific energy absorption （SEA）
maximum peak impact force （MaxF）
optimization design
convex grooves
