轿车白车身概念设计阶段梁截面优化设计  

Cross-Section Optimization for Thin-Walled Beam of Vehicle BIW in Concept Design Phase

作　　者：孔敏[1] 郭永进[1] 刘波 

机构地区：[1]上海交通大学上海市数字化汽车车身工程重点实验室,上海200240 [2]长安汽车工程研究院,重庆401120

出　　处：《机械设计与研究》2010年第6期120-123,共4页Machine Design And Research

基　　金：国家863计划资助项目(2007AA04Z185)

摘　　要：轿车白车身刚度对整车的噪声、耐久性和安全性等都至关重要。在以梁壳单元建立的白车身线框模型基础上,推导薄壁梁截面特性参数的计算方法,引入比例向量为截面形状变化参数和设计变量,通过对白车身刚度进行灵敏度分析,以质量为优化目标,弯曲和扭转刚度为约束,得出车身的优化方案,并进一步推导得出目标梁的截面形状优化结果。优化结果表明,该方法能够在概念设计阶段为设计者提供有效的设计参考,缩短设计周期、提高设计质量。The stiffness of automotive body in white（BIW） is essential to vehicle noise,durability and safety.In this paper,an optimization technique for thin-walled beam cross-section is proposed.The technique includes a wireframe model of BIW,response surface method based beam cross-section characterization,ratio vector introduced to describe the cross-section shape change,and stiffness sensitivity analysis.The optimal cross-section is derived based on the ratio vector description of beam cross-section.This technique could be used in the automotive concept design phase to provide useful design solutions for BIW beam cross-section with better quality and shorter time.

关 键 词：白车身 刚度 截面形状优化 概念设计 

分 类 号：U463.82[机械工程—车辆工程]