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

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.
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Submitted on : Wednesday, November 22, 2017 - 3:05:01 PM
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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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