Study on Stiffness of Minibus BIW Based on FEM Analysis and Test

Abstract

Abstract: The stiffness characteristics of a minibus，including torsion stiffness，bending stiffness and the stiffness of local deformation，are analyzed with the finite element method ( FEM) ． The test data verify the results of finite element analysis． According to the conclusions of analysis and test，BIW torsion stiffness is found to be quite weak，and the deformation of rear doorframe is relatively serious，which needs to be optimized． The ratio of stiffness and quality is applied to evaluate BIW stiffness characteristics，which is more reasonable．

Key words: minibus, carbody-in-white, stiffness, finite element, test

摘要： 采用有限元方法分析了某微型客车白车身扭转刚度和弯曲刚度，以及车身局部变形等刚度特性，并用试验数据验证了分析结果。其结果表明: 该车身扭转刚度较低，后门框变形较大，需要改进设计。指出采用车身刚度与质量比参数来综合评价白车身刚度性能更为合理。

关键词: 微型客车, 白车身, 刚度, 有限元, 试验

CLC Number:

U463.82

WEI Hong-ge，TAN Ji-jin，RUAN Ren-yu，XU Jian-zhong. Study on Stiffness of Minibus BIW Based on FEM Analysis and Test[J]. Journal of Chongqing Jiaotong University(Natural Science), 2011, 30(1): 147-151.

魏洪革，谭继锦，阮仁宇，徐建中. 基于分析和试验的微型客车白车身刚度研究[J]. 重庆交通大学学报（自然科学版）, 2011, 30(1): 147-151.

References

［1］段伟，石琴，张雷，等．轿车白车身静刚度分析［J］．合肥工业大学学报: 自然科学版，2008，31(6): 843－846，862．
DUAN Wei，SHI Qin，ZHANG Lei，et al．Analysis of rigidity ofthe body-in-white of a car ［J］．Journal of Hefei University ofTechnology: Natural Science，2008，31(6): 843－846，862．
［2］靳晓雄，单莘，张强，等．轿车白车身静刚度试验中若干问题的探讨［J］．机械设计与研究，2009，25(4): 92－95．
JIN Xiao－xiong，SHAN Shen，ZHANG Qiang，et al．Discussionon several issues in static stiffness tests of car BIW［J］．MachineDesign and Research，2009，25(4): 92－95．
［3］马迅，赵幼平．轻型客车车身结构刚度与模态的有限元分析［J］．机械科学与技术，2002，21(1): 86－88．
MA Xun，ZHAO You－ping．Finite element analysis on the stiffnessof the body structure of a light-duty bus［J］．Mechanical Scienceand Technology，2002，21(1): 86－88．
［4］陈金亮，王远，谷叶水．客车车身骨架强度与刚度的有限元分析［J］．拖拉机与农用运输车，2009，36(6): 54－57，60．
CHEN Jin－liang，WANG Yuan，GU Ye－shui．Finite elementanalysis for strength and stiffness of bus-body frame［J］．Tractor＆ Farm Transporter，2009，36(6): 54－57，60．
［5］桂良进，范子杰，周长路，等．“长安之星”微型客车白车身刚度研究［J］．机械工程学报，2004，40(9): 195－198．
GUI Liang－jin，FAN Zi－jie，ZHOU Chang－lu，et al．Study onstiffness of Chang’an Star minibus white body［J］．Chinese Journalof Mechanical Engineering，2004，40(9): 195－198．
［6］杨阳，范子杰，桂良进．微型客车白车身结构设计有限元分析［J］．汽车技术，2006(6): 1－4．
YANG Yang，FAN Zi－jie，Gui Liang－Jin．The finite element analysisof a minibus’s BIW［J］．Automobile Technology，2006(6): 1－4．
［7］黄宗斌，李江柳，程丹，等．微型客车车身刚度的提升措施［J］．拖拉机与农用运输车，2008，35(5): 34－35．
HUANG Zong－bin，LI Jiang－liu，CHENG Dan，et al．Study onstiffness improvement of minibus body［J］．Tractor ＆ Farm Transporter，2008，35(5): 34－35．
［8］吕毅宁，吕振华．焊点连接模型对结构刚度的有限元模拟精度的影响分析［J］．工程力学，2009(10): 171－176．
LV Yi－ning，LV Zhen－hua．Effects of spot weld connectingmodels on the prediction accuracy of structural stiffness by finiteelement analysis ［J］．Engineering Mechanics，2009 (10 ): 171－ 176．
［9］谭继锦，张代胜．汽车结构有限元分析［M］．北京: 清华大学出版社，2009: 182．
TAN Ji－jin，ZHANG Dai－sheng．Finite Element Analysis onStructure of Automobile［M］．Beijing: Tsinghua University Press，2009: 182．
［10］羊军，叶永亮，汪侃磊．车身轻量化系数的决定因素及其优化［J］．汽车技术，2010(2): 28－32．
YANG Jun，YE Yong－liang，WANG Kan－lei．Investigation onbody lightweight design method ［J］．Automobile Technology，2010(2): 8－32．

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