A nonlinear approach for modeling rail flexibility using the absolute nodal coordinate formulation

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• 作者：Antonio M. Recuero ; Javier F. Aceituno ; Jos茅 L. Escalona…
• 关键词：Absolute nodal coordinate formulation ; ANCF spin moment ; Flexible multibody systems ; Floating frame of reference formulation ; Vehicle/track interaction
• 刊名：Nonlinear Dynamics
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：83
• 期：1-2
• 页码：463-481
• 全文大小：2,816 KB
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  3.Szolc, T.: Simulation of bending鈥搕orsional鈥搇ateral vibrations of the railway wheelset鈥搕rack system in the medium frequency range. Veh. Syst. Dyn. 30, 473鈥?08 (1998)CrossRef
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  12.Shabana, A.A., Chamorro, R., Rathod, C.: A multi-body system approach for finite-element modelling of rail flexibility in railroad vehicle applications. Proc. Inst. Mech. Eng. Part K: J. Multi-body Dyn. 222, 1鈥?5 (2008)
  13.Recuero, A.M., Escalona, J.L., Shabana, A.A.: Finite-element analysis of unsupported sleepers using three-dimensional wheel鈥搑ail contact formulation. Proc. Inst. Mech. Eng. Part K: J. Multi-body Dyn. 225, 153鈥?65 (2011)
  14.Recuero, A.M., Escalona, J.L.: Application of the trajectory coordinate system and the moving modes method approach to railroad dynamics using Krylov subspaces. J. Sound Vib. 332(20), 5177鈥?191 (2013)CrossRef
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  18.Shabana, A.A., Zaazaa, K.Z., Sugiyama, H.: Railroad Vehicle Dynamics: A Computational Approach. CRC Press, Boca Raton (2008)
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• 作者单位：Antonio M. Recuero (1)
  Javier F. Aceituno (2)
  Jos茅 L. Escalona (2)
  Ahmed A. Shabana (1)
  
  1. Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, 842 W. Taylor St., Chicago, 60607, USA
  2. Department of Mechanical and Manufacturing Engineering, University of Seville, Camino de los Descubrimientos s/n, 41092, Seville, Spain
  
• 刊物类别：Engineering
• 刊物主题：Vibration, Dynamical Systems and Control
  Mechanics
  Mechanical Engineering
  Automotive and Aerospace Engineering and Traffic
  
• 出版者：Springer Netherlands
• ISSN：1573-269X

文摘

This paper describes a new nonlinear formulation based on the absolute nodal coordinate formulation (ANCF) for modeling the dynamic interaction between rigid wheels and flexible rails. The generalized forces and spin moments at the contact points are formulated in terms of the absolute coordinates and gradients of ANCF finite elements used to model the rail. To this end, a new procedure for formulating the generalized ANCF applied moment based on a continuum mechanics approach is introduced. The generalized moment is calculated using the spin tensor defined in terms of the gradients at the contact points, and therefore, the use of this approach does not require the use of angles. In order to have an accurate definition of the creepages, the location and velocity of the contact points are updated online using the rail deformations. An elastic contact formulation is used to define the contact forces that enter into the dynamic formulation of the system equations of motion. An elastic line approach is used to define the rail stress forces, and the relative slip between the rigid wheel and the flexible rail is iteratively updated using the deformations of the ANCF finite elements. The formulation proposed in this investigation is demonstrated using a five-body railroad vehicle negotiating flexible rails. In order to validate the ANCF rail model, the obtained results are compared with previously published results obtained using the floating frame of reference formulation that employs eigenmodes. The comparative study presented in this paper shows that there is, in general, a good agreement between the results obtained using the two different formulations. Keywords Absolute nodal coordinate formulation ANCF spin moment Flexible multibody systems Floating frame of reference formulation Vehicle/track interaction