泡沫填充夹芯墙多胞结构的耐撞性多目标优化设计  

Multi-objective crashworthiness optimization design of foam-filled sandwich wall multi-cell structures

作　　者：文桂林[1,2] 孔祥正[1,2] 尹汉锋[1,2] 肖久如 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082 [2]湖南大学特种装备先进设计技术与仿真教育部重点实验室,长沙410082

出　　处：《振动与冲击》2015年第5期115-121,共7页Journal of Vibration and Shock

基　　金：国家杰出青年科学基金(11225212);国家自然科学基金(青年项目)(11302075);国家科技支撑计划(2012BAH09B02);高等学校博士学科点专项科研基金(20120161130001;20120161120009);汽车车身先进设计制造国家重点实验室基金(自主课题71275003;开放基金31275006)

摘　　要：泡沫填充管由于其优秀的能量吸收性能引起越来越多的关注。根据对丝瓜结构的研究,提出一种与丝瓜横截面类似的泡沫填充夹芯墙多胞结构。基于非线性有限元软件LS-DYNA,建立此种泡沫填充夹芯墙多胞结构的轴压分析有限元模型。基于多项式代理模型,采用多目标粒子群优化算法对不同截面形状的多胞结构进行了优化设计。根据优化结果对不同结构的选择给出指导性意见,使结构在满足峰值力限制的情况下拥有最好的吸能特性。提出的新型结构在车辆工程及航空航天等领域具有很好的应用前景。Foam-filled tubes gain more and more attention due to their excellent energy absorption capacity.According to the study of luffa structures,a kind of foam-filled sandwich wall multi-cell structures similar to the luffa cross-section was proposed. By using the nonlinear finite element code LS-DYNA,the axial crushing finite element model of the foam-filled sandwich wall multi-cell structure was established. Based on the polynomial surrogate model,the structures with different sizes were optimized by adopting multiobjective particle swarm optimization algorithm. According to the result of optimization,suggestions for the choice of reasonable structures were given to make the selected structure have the best energy absorption characteristics under the peak force constraint. The new type of structures proposed here had a good application prospect in vehicle,aerospace and other fields.

关 键 词：泡沫填充 丝瓜结构 耐撞性 多目标优化 

分 类 号：TG302[金属学及工艺—金属压力加工]