Flexible Track Models in Railway Dynamics Using a Finite Element Formulation

J. Pombo, T. Almeida, H. Magalhães, P. Antunes, J. Ambrósio

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The dynamic analysis of railway vehicles involves the construction of three independent models: The vehicle model; the track model; and the wheel-rail contact model. In this paper, a finite element methodology is proposed to create detailed three-dimensional track models, which includes the flexibility of the rails and of the substructure. In this approach, the rails are modelled as beams supported in a discrete manner by spring-damper systems that represent the flexibility of the pads, sleepers, ballast and subgrade. A multibody formulation with Cartesian coordinates is used to describe the kinematic structure of the rigid bodies and joints that constitute the vehicle model. The inclusion of flexible track models is very important to study the dynamic behaviour of railway vehicles in realistic operation scenarios, especially when studying the impact of train operations on the infrastructure and, conversely, the damages on vehicles provoked by the track conditions. This topic has a significant economic impact on the vehicles maintenance and also affects the life cycle costs of tracks. The wheel-rail contact formulation used here allows obtaining, online during the dynamic analysis, the contact points location, even for the most general three-dimensional motion of the wheelsets with respect to the track. The methodology proposed to build flexible track models is validated here by comparing the results obtained with this new approach with those obtained with ANSYS. Furthermore, the methodology is demonstrated by studying the dynamic behaviour of the Alfa Pendular railway vehicle.

Original languageEnglish
Title of host publicationProceedings of the 14th International Conference on Civil, Structural and Environmental Engineering Computing, CC 2013
EditorsB. H. V. Topping, P. Iványi
PublisherCivil-Comp Press
ISBN (Print)9781905088577
DOIs
Publication statusPublished - Sep 2013
Externally publishedYes
Event14th International Conference on Civil, Structural and Environmental Engineering Computing - Caligari, Sardinia, Italy
Duration: 3 Sep 20136 Sep 2013
Conference number: 14
http://www.ctresources.info/ccp/pub.html?f=cc13 (Link to Conference Information)

Publication series

NameCivil-Comp Proceedings
PublisherCivil-Comp Press
Volume102
ISSN (Print)1759-3433

Conference

Conference14th International Conference on Civil, Structural and Environmental Engineering Computing
CountryItaly
CitySardinia
Period3/09/136/09/13
Internet address

Fingerprint

Railroad tracks
Rails
Dynamic analysis
Wheels
Point contacts
Life cycle
Kinematics
Economics
Costs

Cite this

Pombo, J., Almeida, T., Magalhães, H., Antunes, P., & Ambrósio, J. (2013). Flexible Track Models in Railway Dynamics Using a Finite Element Formulation. In B. H. V. Topping, & P. Iványi (Eds.), Proceedings of the 14th International Conference on Civil, Structural and Environmental Engineering Computing, CC 2013 [30] (Civil-Comp Proceedings; Vol. 102). Civil-Comp Press. https://doi.org/10.4203/ccp.102.30
Pombo, J. ; Almeida, T. ; Magalhães, H. ; Antunes, P. ; Ambrósio, J. / Flexible Track Models in Railway Dynamics Using a Finite Element Formulation. Proceedings of the 14th International Conference on Civil, Structural and Environmental Engineering Computing, CC 2013. editor / B. H. V. Topping ; P. Iványi. Civil-Comp Press, 2013. (Civil-Comp Proceedings).
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title = "Flexible Track Models in Railway Dynamics Using a Finite Element Formulation",
abstract = "The dynamic analysis of railway vehicles involves the construction of three independent models: The vehicle model; the track model; and the wheel-rail contact model. In this paper, a finite element methodology is proposed to create detailed three-dimensional track models, which includes the flexibility of the rails and of the substructure. In this approach, the rails are modelled as beams supported in a discrete manner by spring-damper systems that represent the flexibility of the pads, sleepers, ballast and subgrade. A multibody formulation with Cartesian coordinates is used to describe the kinematic structure of the rigid bodies and joints that constitute the vehicle model. The inclusion of flexible track models is very important to study the dynamic behaviour of railway vehicles in realistic operation scenarios, especially when studying the impact of train operations on the infrastructure and, conversely, the damages on vehicles provoked by the track conditions. This topic has a significant economic impact on the vehicles maintenance and also affects the life cycle costs of tracks. The wheel-rail contact formulation used here allows obtaining, online during the dynamic analysis, the contact points location, even for the most general three-dimensional motion of the wheelsets with respect to the track. The methodology proposed to build flexible track models is validated here by comparing the results obtained with this new approach with those obtained with ANSYS. Furthermore, the methodology is demonstrated by studying the dynamic behaviour of the Alfa Pendular railway vehicle.",
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Pombo, J, Almeida, T, Magalhães, H, Antunes, P & Ambrósio, J 2013, Flexible Track Models in Railway Dynamics Using a Finite Element Formulation. in BHV Topping & P Iványi (eds), Proceedings of the 14th International Conference on Civil, Structural and Environmental Engineering Computing, CC 2013., 30, Civil-Comp Proceedings, vol. 102, Civil-Comp Press, 14th International Conference on Civil, Structural and Environmental Engineering Computing, Sardinia, Italy, 3/09/13. https://doi.org/10.4203/ccp.102.30

Flexible Track Models in Railway Dynamics Using a Finite Element Formulation. / Pombo, J.; Almeida, T.; Magalhães, H.; Antunes, P.; Ambrósio, J.

Proceedings of the 14th International Conference on Civil, Structural and Environmental Engineering Computing, CC 2013. ed. / B. H. V. Topping; P. Iványi. Civil-Comp Press, 2013. 30 (Civil-Comp Proceedings; Vol. 102).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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M3 - Conference contribution

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Pombo J, Almeida T, Magalhães H, Antunes P, Ambrósio J. Flexible Track Models in Railway Dynamics Using a Finite Element Formulation. In Topping BHV, Iványi P, editors, Proceedings of the 14th International Conference on Civil, Structural and Environmental Engineering Computing, CC 2013. Civil-Comp Press. 2013. 30. (Civil-Comp Proceedings). https://doi.org/10.4203/ccp.102.30