车身概念设计中接头的精细仿真研究
|
摘要
在车身概念模型设计中,由于忽略接头单元对整车扭转刚度、弯曲刚度还有模态的影响,导致概念设计产生结果与详细模型结果在数值上存在一定偏差,最明显表现在整车的扭转刚度上。
本文针对这些情况作了以下几点工作:
(1)针对目前比较难解决的接头仿真问题,用解耦方法实现刚度矩阵转化变形使其达到可以让参数化接头更符合真实情况。
(2)全面地描述简化接头的模拟过程,详细阐明概念设计中接头单元的组成部分。
(3)利用详细接头单元自身的物理属性,更加方便地测算出接头单元的刚度。通过CAE仿真实验,研究分析得出关于接头单元刚度的测算公式。并采用神经网络的原理对接头的刚度进行测算。
(4)本文通过对比具有接头单元的简化车身模型与不带有接头单元的模型,分析认为具有接头单元的车身模型的扭转刚度更加贴近详细车身模型,验证概念设计的接头单元更加可行。
Base on neglecting the study of the joint in the conception design, the torsion stiffness, the bending stiffness and the model of the whole car might be resulted in much error, especially in the change of the torsion stiffness. So far, the study of the concept joint had not been sufficient.
The works as follow were made for these conditions:
(1) The way of non-coupling was used to simulate the joint element model, in conception method to design the auto body structure.
(2) This paper also describes the process how to simulate the concept joint model, the parts which were made up of the concept joint element and the way how to calculate the stiffness of the normal joint model.
(3) The way to solve the stiffness of the joint element based on the physical properties was carried out. Through a large number of CAE simulation experiment on joint stiffness, the measurement formula was studied.
(4) For validating the feasible of the way to simulate the joint model, the experiment that the compare between the white bodies model with joint model and that without joint model was expensed.
本文针对这些情况作了以下几点工作:
(1)针对目前比较难解决的接头仿真问题,用解耦方法实现刚度矩阵转化变形使其达到可以让参数化接头更符合真实情况。
(2)全面地描述简化接头的模拟过程,详细阐明概念设计中接头单元的组成部分。
(3)利用详细接头单元自身的物理属性,更加方便地测算出接头单元的刚度。通过CAE仿真实验,研究分析得出关于接头单元刚度的测算公式。并采用神经网络的原理对接头的刚度进行测算。
(4)本文通过对比具有接头单元的简化车身模型与不带有接头单元的模型,分析认为具有接头单元的车身模型的扭转刚度更加贴近详细车身模型,验证概念设计的接头单元更加可行。
Base on neglecting the study of the joint in the conception design, the torsion stiffness, the bending stiffness and the model of the whole car might be resulted in much error, especially in the change of the torsion stiffness. So far, the study of the concept joint had not been sufficient.
The works as follow were made for these conditions:
(1) The way of non-coupling was used to simulate the joint element model, in conception method to design the auto body structure.
(2) This paper also describes the process how to simulate the concept joint model, the parts which were made up of the concept joint element and the way how to calculate the stiffness of the normal joint model.
(3) The way to solve the stiffness of the joint element based on the physical properties was carried out. Through a large number of CAE simulation experiment on joint stiffness, the measurement formula was studied.
(4) For validating the feasible of the way to simulate the joint model, the experiment that the compare between the white bodies model with joint model and that without joint model was expensed.
引文
[1]黄金凌,娄永强,轿车结构概念模型中接头的模拟,机械工程学报,2000.5
[2]D.D.Chang Effects of flexible connections on body structural response[C].SAE Transactions,1974,83,233-244
[3]M.K.Rao,M.P.Zebrowski and H.C.Crabb,Automotive body joint analysisfor improved vehicle response.Proceedings of International Symposiumon Automotive Technology and Automation,1983,Vol.2,pp.953-973
[4]K.Lee and Nikolaidis,Identification of flexible joints in vehicle structuresAIAA Jnl,1992
[5]Lee.Y.W,Kwon.Y.W,Kwon.S.Y,et al,A study on the improvement of the structural joint stiffness for aluminum BIM[C].SAE 970583
[6]Beermann.H.J,English translation edited by Guy Tidbury.The Analysis of commercial vehicle structures[M].LONDON:Mechanical Engineering Publications Limited,1989
[7]Nikolaidis.E,Lee K.A 3-D joint model for automotive structure[C]SAE,921088
[8]Kellar S.G.,Patil.S.P,Zhou.J.H,Systematic design of automotive body structure joints using CAE and DOE[J].Automotive Body Design& Engineering,1993:87-95
[9]M.M.K.Lee,T.Pine,T.B.Jones.An experimental and finite element study of the torsional behaviour of T-Joints in automotive structure[J].Proceedings of the Institution of Mechanical Engineering,Journal of Automotive Engineering,Proceedings Part D.2001,215(2):231-240
[10]M.M.K.Lee,T.Pine,T.B.Jones.Automotive box section design under torsion Part1:finite element modeling strategy[J].Proceedings of the Institution of Mechanical Engineering,Journal of Automotive Engineering,Proceedings Part D.2000,214(4):347-359
[11]M.M.K.Lee,T.Pine,T.B.Jones.Automotive box section design under torsion Part2:Behaviour and implications on weight reduction[J].Proceedings of the Institution of Mechanical Engineering,Journal of Engineering,Proceedings Part D.2000,214(5):473-487
[12]Kellar S.G.,Patil.S.P,Zhou.J.H,Systematic design of automotive body structure joints using CAE and DOE[J].Automotive Body Design& Engineering,1993:112-115
[13]Yasuaki Tsurnmi,Hidekazu Nishigaki,Toshiaki Nakagawa,First Order Analysis for Automotive Body Structure Design Part 2:Joint Analysis Considering Nonlinear Behavior SAE 2004-01-1659
[14]张峰,编著,NX Nastran基础分析指南,清华大学出版社,2005:10-11
[15]王彦伟,郑英,有限元法在车身设计中的应用,机械设计与制造,2001.5
[16]张峰,编著,NX Nastran基础分析指南,清华大学出版社,2005:22-25
[17]娄永强,车身结构模型与接头模拟,吉林大学硕士论文,1999.2
[18]刘鸿文,材料力学(上册),高等教育出版社,1979
[19]林松,客车车身改型设计有限元方法的研究,吉林大学硕士论文,2003.2
[20]于开平,周传月,谭惠丰等编著,HyperMesh从入门到精通,科学出版社,2005:7-13
[21]张峰,编著,NX Nastran基础分析指南,清华大学出版社,2005:44-50
[22]黄金凌,娄永强,轿车结构概念模型中接头的模拟,机械工程学报,2000.5:6-7
[23]蒋孝煜,有限元法基础,清华大学出版社,1984
[24]承载式轿车车身弯曲刚度试验,汽车工程手册-试验篇
[25]M.M.凯墨尔,J.A.沃尔夫著,陈砺志 译.现代汽车结构分析[M],北京人民交通出版社,1987
[26]Akifumi Okabe and Noboru Tomioka,Estimating Each Element of Joint Stiffness Matrix Using Neural Network-Estimation from the Rotation Vector at End of Jointed Part[J],SAE TECHNICAL PAPER,2001,Vol4:370;
[27]Yuzhao Song,Dave Flanigan,Cliff Rivard,A New FEA Method for the Evaluation of a Body Joint[J],SAE
[28]A.Beevers,S.M.Steidler,Analysis of stiffness of adbesive joints in car body[J],Materials processing Technology.
[29]M.Zhu,Design of automotive joints:using optimization to translate performance criteria to physical design parameters.Ph.D.dissertation,Virgmia Polytechnic Institute and State University,Blacksburg,VA(1994).
[30]E.Nikolaidist and M.Zhu,DESIGN OF AUTOMOTIVE JOINTS:USING NEURAL NETWORKS AND OPTIMIZATION TO TRANSLATE PERFORMANCE REQUIREMENTS TO PHYSICAL DESIGN PARAMETERS,[J].Computer & Structures Vol.60,1996.
[31]T.M.Cameron,L.Jordan and M.E.M.E1-Sayed,SENSITIVITY OF STRUCTURAL JOINT STIFFNESSES WITH RESPECT TO BEAM PROPERTIES:A HYBRID APPROACH[J],Computer & Structures Vol.63,1997.
[2]D.D.Chang Effects of flexible connections on body structural response[C].SAE Transactions,1974,83,233-244
[3]M.K.Rao,M.P.Zebrowski and H.C.Crabb,Automotive body joint analysisfor improved vehicle response.Proceedings of International Symposiumon Automotive Technology and Automation,1983,Vol.2,pp.953-973
[4]K.Lee and Nikolaidis,Identification of flexible joints in vehicle structuresAIAA Jnl,1992
[5]Lee.Y.W,Kwon.Y.W,Kwon.S.Y,et al,A study on the improvement of the structural joint stiffness for aluminum BIM[C].SAE 970583
[6]Beermann.H.J,English translation edited by Guy Tidbury.The Analysis of commercial vehicle structures[M].LONDON:Mechanical Engineering Publications Limited,1989
[7]Nikolaidis.E,Lee K.A 3-D joint model for automotive structure[C]SAE,921088
[8]Kellar S.G.,Patil.S.P,Zhou.J.H,Systematic design of automotive body structure joints using CAE and DOE[J].Automotive Body Design& Engineering,1993:87-95
[9]M.M.K.Lee,T.Pine,T.B.Jones.An experimental and finite element study of the torsional behaviour of T-Joints in automotive structure[J].Proceedings of the Institution of Mechanical Engineering,Journal of Automotive Engineering,Proceedings Part D.2001,215(2):231-240
[10]M.M.K.Lee,T.Pine,T.B.Jones.Automotive box section design under torsion Part1:finite element modeling strategy[J].Proceedings of the Institution of Mechanical Engineering,Journal of Automotive Engineering,Proceedings Part D.2000,214(4):347-359
[11]M.M.K.Lee,T.Pine,T.B.Jones.Automotive box section design under torsion Part2:Behaviour and implications on weight reduction[J].Proceedings of the Institution of Mechanical Engineering,Journal of Engineering,Proceedings Part D.2000,214(5):473-487
[12]Kellar S.G.,Patil.S.P,Zhou.J.H,Systematic design of automotive body structure joints using CAE and DOE[J].Automotive Body Design& Engineering,1993:112-115
[13]Yasuaki Tsurnmi,Hidekazu Nishigaki,Toshiaki Nakagawa,First Order Analysis for Automotive Body Structure Design Part 2:Joint Analysis Considering Nonlinear Behavior SAE 2004-01-1659
[14]张峰,编著,NX Nastran基础分析指南,清华大学出版社,2005:10-11
[15]王彦伟,郑英,有限元法在车身设计中的应用,机械设计与制造,2001.5
[16]张峰,编著,NX Nastran基础分析指南,清华大学出版社,2005:22-25
[17]娄永强,车身结构模型与接头模拟,吉林大学硕士论文,1999.2
[18]刘鸿文,材料力学(上册),高等教育出版社,1979
[19]林松,客车车身改型设计有限元方法的研究,吉林大学硕士论文,2003.2
[20]于开平,周传月,谭惠丰等编著,HyperMesh从入门到精通,科学出版社,2005:7-13
[21]张峰,编著,NX Nastran基础分析指南,清华大学出版社,2005:44-50
[22]黄金凌,娄永强,轿车结构概念模型中接头的模拟,机械工程学报,2000.5:6-7
[23]蒋孝煜,有限元法基础,清华大学出版社,1984
[24]承载式轿车车身弯曲刚度试验,汽车工程手册-试验篇
[25]M.M.凯墨尔,J.A.沃尔夫著,陈砺志 译.现代汽车结构分析[M],北京人民交通出版社,1987
[26]Akifumi Okabe and Noboru Tomioka,Estimating Each Element of Joint Stiffness Matrix Using Neural Network-Estimation from the Rotation Vector at End of Jointed Part[J],SAE TECHNICAL PAPER,2001,Vol4:370;
[27]Yuzhao Song,Dave Flanigan,Cliff Rivard,A New FEA Method for the Evaluation of a Body Joint[J],SAE
[28]A.Beevers,S.M.Steidler,Analysis of stiffness of adbesive joints in car body[J],Materials processing Technology.
[29]M.Zhu,Design of automotive joints:using optimization to translate performance criteria to physical design parameters.Ph.D.dissertation,Virgmia Polytechnic Institute and State University,Blacksburg,VA(1994).
[30]E.Nikolaidist and M.Zhu,DESIGN OF AUTOMOTIVE JOINTS:USING NEURAL NETWORKS AND OPTIMIZATION TO TRANSLATE PERFORMANCE REQUIREMENTS TO PHYSICAL DESIGN PARAMETERS,[J].Computer & Structures Vol.60,1996.
[31]T.M.Cameron,L.Jordan and M.E.M.E1-Sayed,SENSITIVITY OF STRUCTURAL JOINT STIFFNESSES WITH RESPECT TO BEAM PROPERTIES:A HYBRID APPROACH[J],Computer & Structures Vol.63,1997.