兼顾轻量化与吸能性的汽车前纵梁拼焊板设计与参数优化  

Design and Parameter Optimization of Tailor-welded Blank for Car Front Longitudinal Rail Considering Energy Absorptionand Weight Lightening

作　　者：杨雨泽[1] 孙凌玉[1] 尹奇凡 史国宏 陆百迅 张永闯[1] 

机构地区：[1]北京航空航天大学,北京100083 [2]泛亚汽车技术有限公司,上海201201

出　　处：《重庆工学院学报》2007年第23期6-11,共6页Journal of Chongqing Institute of Technology

基　　金：国家自然科学基金资助项目(59976005)

摘　　要：为减轻车身质量,减少冲压模具数量和降低制造成本,采用拼焊板对某小车的主要吸能部件前纵梁进行了改进设计,并对各块差厚钢板的材料等级及厚度进行了正交试验优化.为保证整车正面碰撞中前纵梁的吸能性,将该梁在整车有限元模型中进行替换,并按照法规及C-NCAP要求进行了正面碰撞分析.结果表明:替换后其碰撞吸能量上升2%左右,B柱的一侧加速度峰值平均下降3%以上,但该零件的质量却降低了6%左右.In order to reduce the weight of the car body and the number and cost of stamping moulds, the tailor-welded blank technology is applied to the longitudinal rails of a car and the maifi energy-absorbing components in a front crash. Through the design of orthogonal experiment, the optimal material grade and thickness of each blank are determined. After replacing this component model with a new tailor-welded one in the verified whole car model, a frontal crash is simulated again according to the requirement of correlative vehicle crash legislation and C-NCAP. By comparison, the calculated results show that the weight of this component has decreased about 6 % and the peak of acceleration at pole B decreased 2 % on average but its energy-absorbing capability has increased 2% or so.

关 键 词：拼焊板 前纵梁 正交试验设计 正面碰撞 有限元 

分 类 号：U463[机械工程—车辆工程]