Lecture acoustique de la voie ferrée

Abstract : The rolling noise is the main source of noise in the railway transport sector at conventional speed. It is produced by the vibration and the acoustic radiation of the vehicle and the railway track, caused by the movement of at the wheel and the rail. These movements are imposed by microscopic irregularities on the rolling surface called roughness. The 2002/49/EC European directive imposes to build noise maps of transport infrastructure. The noise propagating in the environment can be assessed from models whose input parameters are particularly the dynamic behavior of railway tracks and the roughness of rails. These data are generally measured thanks to static systems, which narrow down to the analysis of railway tracks to a few meters. The aim of this Phd is to propose and validate a measurement methodology for the acoustic characterization of tracks for the whole railway network. It is an on-board measurement system named LECAV for "LECture Acoustique de la Voie" in French ("Acoustic reading of railway track") that uses the noise radiated from the wheel and the rail. The respective frequencies ranges of noise emission allow solving the invers problem separately for the wheel and for the rail, and this with the acoustic impedance. One vibroacoustic model based on the finite element method and the Rayleigh integral formula is proposed to assess the acoustic impedance of the wheel. For the rail, the theories of the beam and the punctual elementary sources are used for modeling his acoustic impedance.
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https://tel.archives-ouvertes.fr/tel-01103224
Contributor : Pierre-Emile Chartrain <>
Submitted on : Wednesday, January 14, 2015 - 11:38:01 AM
Last modification on : Wednesday, March 13, 2019 - 4:36:05 PM
Long-term archiving on : Saturday, April 15, 2017 - 5:25:44 PM

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  • HAL Id : tel-01103224, version 1

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Pierre-Emile Chartrain. Lecture acoustique de la voie ferrée. Sciences de l'ingénieur [physics]. Aix Marseille Université, 2013. Français. ⟨tel-01103224⟩

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