微车上部结构强度仿真效率提升设计与验证
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摘要
建立某微型车有限元整车模型,根据GB/T 17578上部结构强度(侧翻)法规及试验方法,进行整车上部结构强度仿真计算。由于整车系统涉及多种接触,网格数量级数较大;同时整个侧翻过程属于准静态翻滚过程,倾翻角速度较小,整个过程持续时间几秒到几十秒,仿真计算效率偏低。基于上述,须对微车侧翻仿真计算效率进行提升,采用能量守恒法、多刚体法、变形体转刚体材料三种效率提升方案设计。通过仿真实验计算与实验结果对比表明,三种效率提升方案在一定误差范围内,分别提升仿真计算效率58%、61%、34%。
The finite element model of a micro car is builded,and then according to the regulations and test method of GB/T17578"superstructure strength",the test simulation analysis for strength of the upper is presented. As the vehicle system involves a variety of contacts,the number of grid series is large;at the same time the whole rollover process belongs to the quasi-static rolling process,the tipping angle is small,the whole process duration is several seconds to several tens of seconds,the simulation calculation efficiency is low. Based on the above,the efficiency of microcomputer rollover simulation has to be improved,and the energy conservation method,multi-rigid method and deformable body rigid body material are proposed. The comparison between the experimental results and the experimental results shows that,The efficiency of the three schemes is 58%,61% and 34%,respectively,in the range of certain error.
The finite element model of a micro car is builded,and then according to the regulations and test method of GB/T17578"superstructure strength",the test simulation analysis for strength of the upper is presented. As the vehicle system involves a variety of contacts,the number of grid series is large;at the same time the whole rollover process belongs to the quasi-static rolling process,the tipping angle is small,the whole process duration is several seconds to several tens of seconds,the simulation calculation efficiency is low. Based on the above,the efficiency of microcomputer rollover simulation has to be improved,and the energy conservation method,multi-rigid method and deformable body rigid body material are proposed. The comparison between the experimental results and the experimental results shows that,The efficiency of the three schemes is 58%,61% and 34%,respectively,in the range of certain error.
引文
[1]谢伯元.汽车翻滚事故再现及试验方法研究[D].上海:同济大学,2009.(Xie Bo-yuan.Auto rolling accident reappearance and test method[D].Shanghai:Tongji University,2009.)
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[5]Marino,Riccardo,Scalzi,Stefano.Asymptotic sideslip angle and yaw ratedecoupling control in four-wheel steering vehicles[J].Vehicle SystemDynamics,2010,48(9):999-1019.
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[7]司红建.大客车侧翻安全性试验仿真与改进设计研究[D].重庆:重庆交通大学,2013.(Si Jian-hong.Simulation and improvement design of safety test of pass-enger car rollover[D].Chongqing:Chongqing Jiaotong University,2013.)
[8]GB/T 175788客车上部结构强度[S].(GB/T 17578 Superstructure Strength[S].)
[9]何欢.车辆翻滚仿真技术与应用研究[D].重庆:重庆大学,2007.(He Huan.Vehicle rolling simulation technology and application[D].Chongqing:Chongqing University,2007.)
[10]吕东升,王东方,苏小平.基于HYPERWORKS的某客车车架有限元分析[J].机械设计与制造,2011(3):11-12.(Lv Dong-sheng,Wang Dong-fang,Su Xiao-ping.Based HYPERWORKSof a bus frame finite element[J].Machinery Design&Manufacture,2011(3):11-12.)
[11]胡志远,曾必强,谢书港.基于LS-DYNA和HyperWorks的汽车安全仿真与分析[M].北京:清华大学出版社.(Hu Zhi-yuan,Zeng Bi-qiang,Xie Shu-gang.Based on Ls-Dyna andHyperWorks Safety Simulation and Analysis[M].Beijing:Tsinghua Un-iversity Press.)
[2]STRASHNYA.An Analysis of Motor Vehicle Rollover Crashes and InjuryOutcomes[R].National Highway Traffic SafetyAdminist,2007.
[3] PG Bedewi,DAGodrick,KHDigges,GT Bahouth.An investigation ofOoccupantinjury in rollover:nass-cds analysis of injury severity andsourceby rollover attibutes[C].18th International Technical Conferenceon theEnhancedon the Enhanced Safety of Vehicle,Paper No.03-0419:National Highway Traffic Safety Administration,2003.
[4]李仕锋,丁良旭,黄雪娇.客车上部结构强度试验及仿真技术分析[J].汽车科技,2012(2):31-35.(Li Shi-feng,Ding Liang-xu,Huang Xue-jiao.Analysis on strength testand simulation technology of superstructure of passenger car[J].AutoMobile Science&Technology,2012(2):31-35.)
[5]Marino,Riccardo,Scalzi,Stefano.Asymptotic sideslip angle and yaw ratedecoupling control in four-wheel steering vehicles[J].Vehicle SystemDynamics,2010,48(9):999-1019.
[6]查官飞.大客车车身结构侧翻试验仿真与安全研究[D].重庆:重庆交通大学,2011.(Cha Guan-fei.Research on simulation and safety of rollover test ofvehicle body structure[D].Chongqing:Chongqing Jiaotong University,2011.)
[7]司红建.大客车侧翻安全性试验仿真与改进设计研究[D].重庆:重庆交通大学,2013.(Si Jian-hong.Simulation and improvement design of safety test of pass-enger car rollover[D].Chongqing:Chongqing Jiaotong University,2013.)
[8]GB/T 175788客车上部结构强度[S].(GB/T 17578 Superstructure Strength[S].)
[9]何欢.车辆翻滚仿真技术与应用研究[D].重庆:重庆大学,2007.(He Huan.Vehicle rolling simulation technology and application[D].Chongqing:Chongqing University,2007.)
[10]吕东升,王东方,苏小平.基于HYPERWORKS的某客车车架有限元分析[J].机械设计与制造,2011(3):11-12.(Lv Dong-sheng,Wang Dong-fang,Su Xiao-ping.Based HYPERWORKSof a bus frame finite element[J].Machinery Design&Manufacture,2011(3):11-12.)
[11]胡志远,曾必强,谢书港.基于LS-DYNA和HyperWorks的汽车安全仿真与分析[M].北京:清华大学出版社.(Hu Zhi-yuan,Zeng Bi-qiang,Xie Shu-gang.Based on Ls-Dyna andHyperWorks Safety Simulation and Analysis[M].Beijing:Tsinghua Un-iversity Press.)