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Receptance of railway tracks at low frequency: Numerical and experimental approaches

Article dans une revue avec comité de lecture
Author
ARLAUD, Elodie
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
COSTA D'AGUIAR, Sofia
198197 SNCF : Innovation & Recherche
BALMES, Etienne
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/18597
DOI
10.1016/j.trgeo.2016.06.003
Date
2016
Journal
Transportation Geotechnics

Abstract

This paper presents numerical simulations and experimental studies on the frequency domain behavior of railway track below 100 Hz, focusing on the link between the substructure properties of the track and its global dynamic response. A numerical method in the frequency domain is first proposed and used to understand the frequency response of a railway track with a French High Speed Line (HSL) design. Then, low-frequency receptance measurements, performed in a specific HSL test site with different designs, are presented. These experimental results are used to characterize a change in the track substructure. Further analysis of the full track responses associated with peaks visible in the receptance test is conducted using numerical simulations. In the considered test case, these simulations demonstrate the existence of the superstructure and ballast resonance on relatively soft mats.

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