基于刚度匹配的汽车保险杠防撞梁改进设计
|
摘要
为提高某汽车保险杠防撞梁的吸能和经济性,基于刚度匹配原理对其进行改进设计.搭建有限元仿真平台,对40%偏置静压试验进行模拟分析,验证了仿真方法的有效性;考虑设计功效、制造成本与维修费用等因素,提出了包含横梁弹性变形、吸能盒塑性变形和横梁塑性变形三阶段的防撞梁合理变形模式;结合变形与刚度的关系,提出了防撞梁刚度匹配模式;以调整结构及材料参数为途径,针对原防撞梁变形不够合理的缺点进行了改进并验证.结果表明:改进后的防撞梁总吸能更多,达到吸能充分的要求;通过满足刚度匹配关系,实现了防撞梁合理变形模式.
In order to improve the ability of energy absorption and economical performance of a vehicle bumper anti-collision beam,an improved design of anti-collision beam was carried out based on the principle of stiffness matching.A finite element simulation platform was built to simulate the 40% offset static pressure test and the simulation method was validated.Considering factors such as design function,manufacturing cost and repairing expense,a reasonable deformation mode of anti-collision beam was proposed,which involved three phases including beam elastic deformation,crash box plastic deformation and beam plastic deformation.Based on the relationship between deformation and stiffness,a stiffness matching mode of anti-collision beam was proposed.Aiming at the unreasonable deformation of the original anti-collision beam,the improvement and validation were performed by adjusting structural and material parameters.Simulation results showed that the total energy absorption of the improved anti-collision beam was higher,which met the requirement of sufficient energy absorption.The reasonable deformation mode of anti-collision beam was realized by meeting the stiffness matching relationship.
In order to improve the ability of energy absorption and economical performance of a vehicle bumper anti-collision beam,an improved design of anti-collision beam was carried out based on the principle of stiffness matching.A finite element simulation platform was built to simulate the 40% offset static pressure test and the simulation method was validated.Considering factors such as design function,manufacturing cost and repairing expense,a reasonable deformation mode of anti-collision beam was proposed,which involved three phases including beam elastic deformation,crash box plastic deformation and beam plastic deformation.Based on the relationship between deformation and stiffness,a stiffness matching mode of anti-collision beam was proposed.Aiming at the unreasonable deformation of the original anti-collision beam,the improvement and validation were performed by adjusting structural and material parameters.Simulation results showed that the total energy absorption of the improved anti-collision beam was higher,which met the requirement of sufficient energy absorption.The reasonable deformation mode of anti-collision beam was realized by meeting the stiffness matching relationship.
引文
[1]徐中明,徐小飞,万鑫铭,等.铝合金保险杠防撞梁结构优化设计[J].机械工程学报,2013,49(8):136-142.XU Zhong-ming,XU Xiao-fei,WAN Xin-ming,et al.Structure optimal design of aluminum alloy bumper anticollision beam[J].Chinese Journal of Mechanical Engineering,2013,49(8):136-142.
[2]HAMBALI A,RABIATUL A R,RAHIM A S,et al.Design optimization of automotive bumper beam through energy absorption analysis[J].International Journal of Engineering and Science,2012,3(1):34-39.
[3]LIM Joung Myung,SHIN Dong-won,KIM Myeong Ki.Development of automobile bumper beam using hybrid process[J].SAE,2011,6(1):11-19.
[4]刘海江,张夏,肖丽芳.基于LS-DYNA的7075铝合金汽车保险杠碰撞仿真分析[J].机械设计,2011,28(2):18-22.LIU Hai-jiang,ZHANG Xia,XIAO Li-fang.Collision simulation analysis of 7075aluminum alloy car bumper based on LS-DYNA[J].Journal of Machine Design,2011,28(2):18-22.
[5]米林,魏显坤,万鑫铭,等.铝合金保险杠吸能盒碰撞吸能特性[J].重庆理工大学学报:自然科学,2012,26(6):1-7.MI Lin,WEI Xian-kun,WAN Xin-ming,et al.A research on the impact energy-absorbing capacity of the aluminum alloy energy-absorbing box of the bumper[J].Journal of Chongqing University of Technology:Natural Science,2012,26(6):1-7.
[6]郭嘉,黄滨,吴大转,等.三叶形等距型面联接的接触-冲击特性分析[J].工程设计学报,2011,18(2):109-114.GUO Jia,HUANG Bin,WU Da-zhuan,et al.Analysis of contact-impact characteristics of trilobe equidistant polygonal connection[J].Chinese Journal of Engineering Design,2011,18(2):109-114.
[7]周游,李国顺,唐进元.截齿截割煤岩的LS_DYNA仿真模拟[J].工程设计学报,2011,18(2):103-108.ZHOU You,LI Guo-shun,TANG Jin-yuan.Simulation and analysis for pick cutting rock by LS_DYNA[J].Chinese Journal of Engineering Design,2011,18(2):103-108.
[8]LI Ni,SU Ze-ya,CHEN Zheng,et al.A real-time aircraft infrared imaging simulation platform[J].Optik,2013,124(17):2885-2893.
[9]YANG Zhao-hui,LU Jin-chi,AHMED Elgamal.A web-based platform for computer simulation of seismic ground response[J].Advances in Engineering Software,2004,35(5):249-259.
[10]FAILLE Damien,DAVELAAR Frans,MURGEY Sebastien,et al.Hierarchical hydro power valley control:validation on simulation platform[J].Control Engineering Practice,2014,30(1):160-168.
[2]HAMBALI A,RABIATUL A R,RAHIM A S,et al.Design optimization of automotive bumper beam through energy absorption analysis[J].International Journal of Engineering and Science,2012,3(1):34-39.
[3]LIM Joung Myung,SHIN Dong-won,KIM Myeong Ki.Development of automobile bumper beam using hybrid process[J].SAE,2011,6(1):11-19.
[4]刘海江,张夏,肖丽芳.基于LS-DYNA的7075铝合金汽车保险杠碰撞仿真分析[J].机械设计,2011,28(2):18-22.LIU Hai-jiang,ZHANG Xia,XIAO Li-fang.Collision simulation analysis of 7075aluminum alloy car bumper based on LS-DYNA[J].Journal of Machine Design,2011,28(2):18-22.
[5]米林,魏显坤,万鑫铭,等.铝合金保险杠吸能盒碰撞吸能特性[J].重庆理工大学学报:自然科学,2012,26(6):1-7.MI Lin,WEI Xian-kun,WAN Xin-ming,et al.A research on the impact energy-absorbing capacity of the aluminum alloy energy-absorbing box of the bumper[J].Journal of Chongqing University of Technology:Natural Science,2012,26(6):1-7.
[6]郭嘉,黄滨,吴大转,等.三叶形等距型面联接的接触-冲击特性分析[J].工程设计学报,2011,18(2):109-114.GUO Jia,HUANG Bin,WU Da-zhuan,et al.Analysis of contact-impact characteristics of trilobe equidistant polygonal connection[J].Chinese Journal of Engineering Design,2011,18(2):109-114.
[7]周游,李国顺,唐进元.截齿截割煤岩的LS_DYNA仿真模拟[J].工程设计学报,2011,18(2):103-108.ZHOU You,LI Guo-shun,TANG Jin-yuan.Simulation and analysis for pick cutting rock by LS_DYNA[J].Chinese Journal of Engineering Design,2011,18(2):103-108.
[8]LI Ni,SU Ze-ya,CHEN Zheng,et al.A real-time aircraft infrared imaging simulation platform[J].Optik,2013,124(17):2885-2893.
[9]YANG Zhao-hui,LU Jin-chi,AHMED Elgamal.A web-based platform for computer simulation of seismic ground response[J].Advances in Engineering Software,2004,35(5):249-259.
[10]FAILLE Damien,DAVELAAR Frans,MURGEY Sebastien,et al.Hierarchical hydro power valley control:validation on simulation platform[J].Control Engineering Practice,2014,30(1):160-168.