EPJ Web Conf.
Volume 140, 2017Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media
|Number of page(s)||4|
|Published online||30 June 2017|
Stochastic heterogeneous material modeling for wave propagation in a ballast layer
1 MSSMat, CNRS, CentraleSupélec, Université Paris-Saclay, 92290 Châtenay-Malabry, France
2 I&R, SNCF, 75012, Paris, France
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Published online: 30 June 2017
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. A numerical model of the ballast and the surrounding soil is then constructed based on an explicit spectral element solver. This model allows to describe numerically the wave field generated, as well as to construct dispersion curves for the ballast-soil model. The influence of heterogeneity is discussed by comparison with a similar model where the ballast is assumed homogeneous.
© The Authors, published by EDP Sciences, 2017
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