Impact of the Heterogeneity of the Ballast on the Dynamical Behavior of the Ballast-Soil System - Archive ouverte HAL Accéder directement au contenu
Chapitre D'ouvrage Année : 2018

Impact of the Heterogeneity of the Ballast on the Dynamical Behavior of the Ballast-Soil System

Résumé

This paper discusses the dynamical behavior of a randomly-fluctuating heterogeneous continuum model of the ballast. The Young’s modulus is modeled as a random field parameterized by its average, its variance and a correlation model representing non-interpenetrating spheres. A numerical model of the ballast and the surrounding soil is then constructed based on an efficient implementation of an explicit spectral element solver on a large cluster of computers. This model allows to describe numerically the wave field generated in the ballast and soil by the passage of a train, as well as to construct dispersion equations for the ballast-soil model. The influence of heterogeneity is discussed by comparison with a similar model where the ballast is assumed homogeneous. Different values of the soil mechanical parameters are considered and compared. Finally, potential consequences for the design of the ballast are discussed.
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Dates et versions

hal-04482175 , version 1 (28-02-2024)

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Lucio de Abreu Correa, Regis Cottereau, Estelle Bongini, Sofia Costa D’aguiar, Baldrik Faure, et al.. Impact of the Heterogeneity of the Ballast on the Dynamical Behavior of the Ballast-Soil System. Computational Methods and Models for Transport, 45, Springer International Publishing, pp.185-205, 2018, Computational Methods in Applied Sciences, 978-3-319-54489-2. ⟨10.1007/978-3-319-54490-8_12⟩. ⟨hal-04482175⟩
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