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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 110
PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 25

Wave Propagation in a Ballasted Railway Track: A Stochastic Heterogeneous Approach

L. de Abreu Correa1, R. Cottereau1, C. Voivret2, S. Costa d'Aguiar2, E. Bongini2 and B. Faure2

1Laboratoire MSSMat UMR 8579, Centrale Supelec, CNRS, Chatenay-Malabry, France
2Innovation and Research Department, SNCF, Paris, France

Full Bibliographic Reference for this paper
L. de Abreu Correa, R. Cottereau, C. Voivret, S. Costa d'Aguiar, E. Bongini, B. Faure, "Wave Propagation in a Ballasted Railway Track: A Stochastic Heterogeneous Approach", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 25, 2016. doi:10.4203/ccp.110.25
Keywords: wave propagation, granular media, ballasted railway track, stochastic modeling, spectral element method.

Summary
The work, described in this paper, is an investigation of the dynamic behavior of a ballasted railway track modeled as a stochastic heterogeneous media. Three-dimensional simulations carried out using the spectral element method were used to generate the results. This leads to a comparison, in the frequency space, of different ratios of mechanical properties of soil and ballast together with homogeneous compared with heterogeneous models. The presence of dispersion in the homogeneous case and the influence of the heterogeneities are stressed. Additional apparent damping is induced in the free field in the heterogeneous case.

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