Numerical Study of Railway Track Dynamics : Case of a Transition Zone

The main objective of this paper is to present an innovative numerical tool to represent the track and platform dynamic behavior under passing trains. Dynavoie is currently being developed for engineering purposes at SNCF. It is specifically designed to correctly reproduce the track and platform dynamic behaviors in the time domain. This model is based on the Finite Element Method (FEM), adapted to the railway track using model reduction techniques. Taking advantage of the periodicity of the track introduced by the regular sleeper spacing, one or several basic slices containing all the geometric properties of the structure can be identified. Static and periodic responses of these slices are computed. Then, reduction is performed using these deformations. 1SNCF, Innovation & Research, 40 avenue des Terroirs de France, 75611, Paris Cedex 12, France 2Arts et Métiers ParisTech, Laboratoire PIMM, CNRS UMR 8006 151, boulevard de l’hôpital, 75013, Paris, France 3SDTools 44, Rue Vergniaud, 75013, Paris, France

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