Dynamic behaviour of ballasted railway tracks: a discrete/continuous approach

Laurent Ricci 1 Vu-Hieu Nguyen 2 Karam Sab 1 Denis Duhamel 1 Laurent Schmitt 3
1 LAMI - Laboratoire d'Analyse des Matériaux et Identification
2 MSME - Laboratoire de Modélisation et Simulation Multi Echelle
3 LIVE - Laboratoire Image, Ville, Environnement
Abstract : Owing to the small number of grains in the vertical direction of the ballast layer of a railway track, a discrete/continuum double-layer model is proposed: the upper layer (the ballast) is modelled by a discrete 3D-lattice of interacting grains whereas the infinite underlayer is a continuum linear elastic medium. The problem under consideration is the dynamic behaviour of this double-layer system under the action of a moving load. A parametric study concerning the underlayer stiffness, the load velocity and the grain size is conducted. A comparison with the continuum modelling is provided for realistic moving loads.
Keywords : Moving load Fourier’s transform Dynamic railway track Discrete/continuum model Ballast vibration
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Article dans une revue
Computers and Structures, Elsevier, 2005, 83, pp.2282-2292. 〈10.1016/j.compstruc.2005.03.035〉
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https://hal-upec-upem.archives-ouvertes.fr/hal-01644698
Contributeur : Thibault Lemaire <>
Soumis le : mercredi 22 novembre 2017 - 15:05:01
Dernière modification le : vendredi 11 janvier 2019 - 14:34:06

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Laurent Ricci, Vu-Hieu Nguyen, Karam Sab, Denis Duhamel, Laurent Schmitt. Dynamic behaviour of ballasted railway tracks: a discrete/continuous approach. Computers and Structures, Elsevier, 2005, 83, pp.2282-2292. 〈10.1016/j.compstruc.2005.03.035〉. 〈hal-01644698〉

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