乘用车车身结构轻量化设计技术研究与实践  

Study and Practice of Car Body Structure Lightweight Design

作　　者：兰凤崇[1] 庄良飘[1] 钟阳[1] 陈吉清[1] 韦兴民[2] 

机构地区：[1]华南理工大学机械与汽车工程学院,广东省汽车工程重点实验室,广州510641 [2]吉利汽车研究院有限公司,台州317000

出　　处：《汽车工程》2010年第9期763-768,773,共7页Automotive Engineering

基　　金：科技部国际科技合作项目(2008DFB50020);广东省科技计划项目(2007B010-400052)资助

摘　　要：提出了面向设计的车身结构轻量化设计流程,并将其应用于某SUV的开发中。研究表明:运用灵敏度分析技术和基于梯度法的修正可行方向优化算法能更高效地实现车身结构轻量化;提高材料的屈服强度可弥补厚度减小后对碰撞安全性造成的负面影响。结构件轻量化和材料替换前后均作了刚强度和碰撞性能的对比,设计方案和研究结果都在应用中得到有效验证。The design-oriented flow chart for the lightweighting design of car body structure is put forward and is applied to the development of a SUV.The studies indicate that using sensitivity analysis technique combined with gradient-based modified feasible direction optimization algorithm can more efficiently realize the weight reduction of car body structure,and increasing material yield strength can compensate the adverse effect of structural member thinning on crashworthiness.During the whole process of studies,all strength,stiffness and crashworthiness before and after structural part lightweighting and material substitution are compared for validation,and all design schemes and research results have been effectively verified in practical application.

关 键 词：车身结构 优化设计 轻量化 

分 类 号：U463.82[机械工程—车辆工程]