摘要
针对多面体夹芯结构抗撞性优化过程中,传统数学模型以体胞边长,体胞高度等体胞几何尺寸为设计变量建立抗撞性优化数学模型,未考虑体胞形成过程对结构吸能特性的影响,导致所建模型遗漏了体胞的分布密度,且优化变量多、模型复杂的问题。对多面体夹芯体胞演变机理进行分析,以多面体夹芯结构演变参数为设计变量,建立基于Kriging近似技术的多面体夹芯结构抗撞性优化模型。构建多面体夹芯结构抗撞性优化流程,求解获得抗撞性最优的多面体夹芯结构设计,通过与波纹夹芯结构的对比,验证了该结构的可靠性。
In crashworthiness optimization of polyhedron sandwich structure,the height and other geometrical feature of the unit cell are considered as design variables to construct the optimization model.The impact from generating process of the unit cell is neglected.The optimization model is complex even though the distribution density of the unit cell is omitted.The evolvement mechanism of polyhedron unit cell is analyzed.A crashworthiness optimization mathematical model is established based on Kriging approximate model according to the evolvement mechanism.Based on the mathematical model optimization process using genetic algorithm is put forward on getting the crashworthiness optimal solution.The effective absorber and reliability of the polyhedron sandwich structure is illustrated by compared with corrugated sandwich.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2014年第11期135-143,共9页
Journal of Mechanical Engineering
基金
优秀青年科学基金(51322506)
国家自然科学基金(51205347)资助项目
关键词
多面体体胞
抗撞性优化
演变参数
近似模型
polyhedron unit cell
crashworthiness optimization
evolvement parameters
approximate model
