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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 110
PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 232

Wheel-Rail Contact Parameters Sensitivity Analysis with Stochastic Track Geometry

A.M. Panunzio1,2, G. Puel1, R. Cottereau1, S. Simon2 and X. Quost2

1Laboratoire MSSMat, CNRS UMR 8579, CentraleSupélec, Université Paris-Saclay, France
2Régie Autonome des Transports Parisiens, Paris, France

Full Bibliographic Reference for this paper
A.M. Panunzio, G. Puel, R. Cottereau, S. Simon, X. Quost, "Wheel-Rail Contact Parameters Sensitivity Analysis with Stochastic Track Geometry", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 232, 2016. doi:10.4203/ccp.110.232
Keywords: track geometry irregularities, rail-wheel contact, sensitivity analysis.

Summary
The dynamical response of a train on a track with geometry irregularities depends on several parameters. Most of them cannot be accurately identified and have to be considered as uncertain and the wheel-rail contact parameters cannot be completely characterized using deterministic models. In this paper a stochastic characterization of the track geometry is built using measurements data. The tracks thus generated are introduced as the input of a railway dynamics software (SIMPACK) to characterize the stochastic contact patch and the parameters on which it depends: contact forces and wheelset-rail relative position. A variance-based global sensitivity analysis is performed on these quantities, with respect to the stochastic geometry irregularities in a curved track. The aim is to identify which kinds of irregularities have a more important impact on the contact patch variations.

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