泡沫铝填充双帽保险杠横梁碰撞性能优化  

Optimization of impact performance of aluminum foam filled double-hat bumper beam

作　　者：王旭飞[1,2] 谭飞 刘怡帆 周鹏 王鹏辉 刘菊蓉[1,2] WANG Xufei;TAN Fei;LIU Yifan;ZHOU Peng;WANG Penghui;LIU Jurong(School of Mechanical Engineering,Shaanxi University of Technology,Hanzhong 723000,China;Shaanxi Key Laboratory of Industrial Automation,Shaanxi University of Technology,Hanzhong 723000,China;School of Automotive Engineering,Shaanxi Institute of Mechatronic Technology,Baoji 721001,China)

机构地区：[1]陕西理工大学机械工程学院,汉中723000 [2]陕西理工大学陕西省工业自动化重点实验室,汉中723000 [3]陕西机电职业技术学院汽车工程学院,宝鸡721001

出　　处：《现代制造工程》2022年第9期48-54,90,共8页Modern Manufacturing Engineering

基　　金：陕西省科技厅项目(2020JM-600);陕西省工业自动化重点实验室项目(18JS020)。

摘　　要：为了轻量化碰撞性能优良的汽车保险杠,优化研究新型泡沫铝填充的钢铝双帽型保险杠横梁。分别以正面对中、正面偏置和斜向角度3种碰撞工况建立摆锤和保险杠横梁的有限元模型,以横梁的前帽厚度、后帽厚度、前帽屈服应力和泡沫铝密度为设计变量,根据碰撞工况确定设计变量的约束条件,进行了3种碰撞工况下以比吸能最大和侵入量最小的多目标优化。进一步考虑横梁碰撞发生的概率,并将其作为权重因子建立包含综合比吸能最大和综合侵入量最小的多目标优化模型。优化后的保险杠横梁综合比吸能提高了4.19%,综合侵入量减少了3.54%,提高了新型保险杠横梁的碰撞性能及鲁棒性。In order to lightweight automobile bumper with good impact performance,aluminum foam filled steel-aluminum double-hat type bumper beam was optimized.The finite element models of the pendulum and the bumper beam were established under three impact conditions of facing center,facing bias and oblique angle impact respectively.The thickness of the front hat,the thickness of the back hat,the yield stress of the front hat and the density of aluminum foam were taken as the design variables,and the constraint conditions of the design variables were determined according to the impact conditions.Multi-objective optimization was carried out to maximize specific energy absorption and minimize intrusion amount under three impact conditions.Furthermore,the probability of beam impact was considered as a weight factor to establish a multi-objective optimization model with maximum comprehensive specific energy absorption and minimum comprehensive intrusion amount.After optimization,the comprehensive specific energy absorption of the bumper beam is increased by 4.19%,the comprehensive intrusion amount is reduced by 3.54%,and the robustness of the bumper beam impact performance is improved.

关 键 词：泡沫铝填充 双帽型 保险杠横梁 碰撞性能 多目标优化 

分 类 号：TH122[机械工程—机械设计及理论]