基于25%小偏置正面碰撞的某乘用车前端结构改进设计  

Design and Improvement of a Passenger Vehicle Frontal Structure Based on 25% Small Overlap Frontal Crash

作　　者：李林峰[1] 刘卫国[2] 张君媛[1] 张乐[1] 周浩[1] 

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130000 [2]浙江吉利汽车研究院有限公司,杭州311228

出　　处：《中国机械工程》2015年第17期2400-2405,共6页China Mechanical Engineering

基　　金：浙江省汽车安全技术重点实验室运营专项(YSD0C11-02);长春市科技计划资助项目(12ZX19)

摘　　要：对比分析25%小偏置正面碰撞车体结构变形与正面全宽和40%偏置碰撞车体结构变形异同点。针对小偏置碰撞车体结构变形特点提出车体前端结构优化措施,优化措施包括结构改进与材料加强两个方面。对优化后的整车模型进行25%小偏置碰撞虚拟实验,结果表明车体结构优化效果显著,乘员舱侵入量明显减小。进行了正面全宽和40%偏置碰撞工况下的减速度波形验证,证明改进整车模型刚度配置合理,不会影响乘员约束系统的匹配。Comparing with the full frontal crash and the 40% offset crash,the differences and similarities of the vehicle structure deformation in the 25% small overlap frontal crash were analyzed.Based on the deformation characteristics of the vehicle structure in the small overlap frontal crash,the optimization measures of the vehicle front end structure were proposed,which included improving structures and strengthening materials.The optimized vehicle model was tested in the 25%small overlap crash virtual experiments.And the results show that the performance of the vehicle structure is improved significantly and the intrusion of the passenger compartment decreases obviously.Through verifying the deceleration pulses in the full frontal crash and the 40% offset frontal crash,the stiffness of the improved vehicle model is proved to be properly configured and has no effect on the match of the occupant restraint system.

关 键 词：汽车安全性 25%小偏置正面碰撞 车体结构评价 结构改进 

分 类 号：U461.91[机械工程—车辆工程]