摘要
为了减少在低速正碰下汽车的维修成本以及实现汽车前端结构的轻量化。采用等效静态载荷方法对汽车前端结构的尺寸和形状进行了抗撞性优化设计,以整个结构质量最小为优化的目标函数,以前部结构主要部件的厚度尺寸以及节点坐标形貌为设计变量,以侵入量以及加强筋的冲压工艺要求为约束进行了碰撞优化设计。等效静态载荷法将非线性瞬态碰撞优化问题转化为多工况线性静态优化问题,数值算例证明等效静态载荷法可高效地求解碰撞优化问题,并得到高精度的最优解。
Equivalent static loads method(ESLM)was introduced to study size and morphology crashworthiness optimization for automobile frontal structures to reduce maintenance cost and realize lightweight design of automotive frontal structures under lower speed frontal impacts.Taking minimizing the mass of automotive frontal structures as an objective function,thickness sizes of automotive frontal structures and morphology node coordinates as design variables,and invading quantity and process requirements of stiffeners as constrains,the crashworthiness optimization design was conducted.ESLM was used to convert this nonlinear and transient crashworthiness optimization problem into a multi-mode linear static optimization one.Numerical examples showed that ESLM can effectively be used to solve crashworthiness optimization problems and obtain their optimal solutions with a higher accuracy.
作者
陆善彬
蒋伟波
左文杰
LU Shanbin;JIANG Weibo;ZUO Wenjie(State Key Lab of Automotive Simulation and Control,Jilin University,Changchun 130022,China;College of Automotive Engineering,Jilin University,Changchun 130022,China;College of Mechanical Science&Engineering,Jilin University,Changchun 130022,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2018年第7期56-61,共6页
Journal of Vibration and Shock
基金
国家自然基金面上项目(51575226)
吉林省科技发展计划(20140101071JC)
关键词
汽车前端结构
碰撞优化
尺寸与形貌优化
等效静态载荷法
automotive frontal structures
crashworthiness optimization
size and morphology optimization
equivalent static loads method
