摘要
提出了一种适用于汽车概念设计阶段的车身T型接头快速优化方法。该方法根据T型接头的结构特点,将其划分为1个本体区域、3个分支区域和3个过渡区域,并建立7个相应的六面体作为各区域的控制体,通过六面体顶点的位置变化来实现各区域结构的尺寸变化。接着提取整车刚度和强度分析工况下接头的边界载荷,并利用拉丁方实验设计方法对接头有限元模型进行数据采样,采用移动最小二乘响应面方法构建了接头的近似优化模型。最后将接头中3个分支区域的整体尺寸和零部件板厚作为设计变量,应用连续二次规划方法对近似模型进行优化。结果表明,在实现接头轻量化的前提下,大大提高了接头的刚度和强度。
A rapid optimization scheme for the T-joint of vehicle body suitable for the concept design phase of vehicle development is proposed.Firstly,according to its structural features,the T-joint is divided into a body region,three branch regions and three transitional regions,and seven corresponding hexahedrons are constructed as control bodies of each region,so that the variation in the dimension of each region can be realized by changing the position of vertexes in hexahedron.Then,the boundary loads of joint are extracted from the model for the stiffness and strength analysis of complete vehicle,and the Latin square design of experiment is used to guide the data sampling of joint model and moving least-square response surface method is adopted to set up the approximate optimization model for T-joint.Finally taking the dimensions of three branch regions and the thicknesses of relevant panels as design variables,an optimization on the approximate model is carried out using sequential quadratic programming method.The results show that the stiffness and strength of T-joint are greatly enhanced on the premise of achieving the lightweighting of T-joint.
出处
《汽车工程》
EI
CSCD
北大核心
2011年第4期283-289,302,共8页
Automotive Engineering
基金
教育部长江学者与创新团队发展计划项目(531105050037)
“十一五”国家科技支撑计划项目(2006BAF02A02-03)资助
关键词
车身
T型接头
响应面法
轻量化
vehicle body
T-joint
response surface method
lightweighting
