基于正碰CAE分析的车身纵梁结构优化设计  

Structure optimization design of vehicle longitudinal beam based on CAE analysis of frontal impact

作　　者：张立强 ZHANG Liqiang(IAT Automobile Technology Co.,Ltd.,Beijing 100076,China)

机构地区：[1]阿尔特汽车技术股份有限公司,北京100076

出　　处：《计算机辅助工程》2018年第3期69-72,共4页Computer Aided Engineering

摘　　要：对某车型进行50 km/h、100%正面碰撞CAE仿真分析,发现车身前纵梁溃缩变形不充分,导致B柱加速度峰值超过45g目标要求。对前纵梁结构和前防撞梁吸能盒进行优化,由CAE分析可知:车身前纵梁结构变形得到明显改善,B柱加速度峰值降低到45g以下,满足目标要求。该优化可有效提高车身正面碰撞的安全性能。The CAE simulation analysis of some vehicle at 50 km/h velocity and 100% frontal impact is carried out. The crushing deformation of the front longitudinal beam is insufficient. The peak acceleration of B-pillar is more than the target requirement 45 g. The front longitudinal beam structure and the energy absorbing box of the front bumper beam are optimized. The CAE analysis results on the optimized vehicle body show that the deformation of the front longitudinal beam structure is improved obviously,and the peak acceleration of B-pillar is reduced to less than 45 g,which can meet the target requirement. The optimization can effectively improve the safety performance of vehicle frontal impact.

关 键 词：正面碰撞 防撞梁 吸能盒 加速度 溃缩变形 高强钢板 轻量化 

分 类 号：U463.326[机械工程—车辆工程]