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Article Dans Une Revue Computational Mechanics Année : 2017

Randomly-fluctuating heterogeneous continuum model of a ballasted railway track

Résumé

This paper proposes a description of a granular medium as a stochastic heterogeneous continuum medium. The heterogeneity of the material properties field recreates the heterogeneous stress field in a granular medium. The stochastic approach means that only statistical information, easily available, is required to construct the model. The heterogeneous continuum model is calibrated with respect to discrete simulations of a set of railway ballast samples. As they are continuum-based, the equilibrium equations can be solved on a large scale using a parallel implementation of an explicit time discretization scheme for the Finite Element Method. Simulations representative of the influence on the environment of the passage of a train on a ballasted railway track clearly show the influence of the heterogeneity. These simulations seem to correlate well with previously unexplained overly damped measurements in the free field.
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Dates et versions

hal-01635950 , version 1 (16-11-2017)

Identifiants

Citer

Lucio de Abreu Corrêa, Juan Carlos Quezada, Régis Cottereau, Sofia S Costa D 'Aguiar, Charles Voivret. Randomly-fluctuating heterogeneous continuum model of a ballasted railway track. Computational Mechanics, 2017, 60 (5), pp.845 - 861. ⟨10.1007/s00466-017-1446-8⟩. ⟨hal-01635950⟩
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