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A comprehensive model of the railway wheelset-track interaction in curves

A comprehensive model of the railway wheelset-track interaction in curves
A comprehensive model of the railway wheelset-track interaction in curves
Train–track interaction has been extensively studied in the last 40 years at least, leading to modelling approaches that can deal satisfactorily with many dynamic problems arising at the wheel/rail interface. However, the available models are usually not considering specifically the running dynamics of the vehicle in a curve, whereas a number of train–track interaction phenomena are specific to curve negotiation.

The aim of this paper is to define a model for a flexible wheelset running on a flexible curved track. The main novelty of this work is to combine a trajectory coordinate set with Eulerian modal coordinates; the former permits to consider curved tracks, and the latter models the small relative displacements between the trajectory frame and the solid. In order to reduce the computational complexity of the problem, one single flexible wheelset is considered instead of one complete bogie, and suitable forces are prescribed at the primary suspension seats so that the mean values of the creepages and contact forces are consistent with the low frequency curving dynamics of the complete vehicle.

The wheelset model is coupled to a cyclic track model having constant curvature by means of a wheel/rail contact model which accounts for the actual geometry of the contacting profiles and for the nonlinear relationship between creepages and creep forces.

The proposed model can be used to analyse a variety of dynamic problems for railway vehicles, including rail corrugation and wheel polygonalisation, squeal noise, numerical estimation of the wheelset service loads. In this paper, simulation results are presented for some selected running conditions to exemplify the application of the model to the study of realistic train–track interaction cases and to point out the importance of curve negotiation effects specifically addressed in the work.
0022-460X
4152-4169
Martínez-Casas, J.
0dc0fd56-e99b-4fb3-a20d-029ef73b0fd7
Di Gialleonardo, E.
601ec51e-4498-432f-854d-910254937830
Bruni, S.
535cd772-ffa2-478e-b06d-3aa2fefd2e04
Baeza, L.
09dc5565-ad4b-49af-a104-d4b6ad28e1b0
Martínez-Casas, J.
0dc0fd56-e99b-4fb3-a20d-029ef73b0fd7
Di Gialleonardo, E.
601ec51e-4498-432f-854d-910254937830
Bruni, S.
535cd772-ffa2-478e-b06d-3aa2fefd2e04
Baeza, L.
09dc5565-ad4b-49af-a104-d4b6ad28e1b0

Martínez-Casas, J., Di Gialleonardo, E., Bruni, S. and Baeza, L. (2014) A comprehensive model of the railway wheelset-track interaction in curves. Journal of Sound and Vibration, 333 (18), 4152-4169. (doi:10.1016/j.jsv.2014.03.032).

Record type: Article

Abstract

Train–track interaction has been extensively studied in the last 40 years at least, leading to modelling approaches that can deal satisfactorily with many dynamic problems arising at the wheel/rail interface. However, the available models are usually not considering specifically the running dynamics of the vehicle in a curve, whereas a number of train–track interaction phenomena are specific to curve negotiation.

The aim of this paper is to define a model for a flexible wheelset running on a flexible curved track. The main novelty of this work is to combine a trajectory coordinate set with Eulerian modal coordinates; the former permits to consider curved tracks, and the latter models the small relative displacements between the trajectory frame and the solid. In order to reduce the computational complexity of the problem, one single flexible wheelset is considered instead of one complete bogie, and suitable forces are prescribed at the primary suspension seats so that the mean values of the creepages and contact forces are consistent with the low frequency curving dynamics of the complete vehicle.

The wheelset model is coupled to a cyclic track model having constant curvature by means of a wheel/rail contact model which accounts for the actual geometry of the contacting profiles and for the nonlinear relationship between creepages and creep forces.

The proposed model can be used to analyse a variety of dynamic problems for railway vehicles, including rail corrugation and wheel polygonalisation, squeal noise, numerical estimation of the wheelset service loads. In this paper, simulation results are presented for some selected running conditions to exemplify the application of the model to the study of realistic train–track interaction cases and to point out the importance of curve negotiation effects specifically addressed in the work.

Full text not available from this repository.

More information

Accepted/In Press date: 25 March 2014
e-pub ahead of print date: 1 May 2014
Published date: 1 September 2014
Additional Information: cited By 5
Organisations: Dynamics Group

Identifiers

Local EPrints ID: 411268
URI: https://eprints.soton.ac.uk/id/eprint/411268
ISSN: 0022-460X
PURE UUID: e4ef486b-d813-442c-9f10-d8090f3d0d97
ORCID for L. Baeza: ORCID iD orcid.org/0000-0002-3815-8706

Catalogue record

Date deposited: 16 Jun 2017 16:31
Last modified: 20 Jul 2019 00:28

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