Experimental assessment of wheel/rail interaction force with rolling noise analysis

Pierre-Emile Chartrain , Pierre-Olivier Mattei (1) , Estelle Bongini

1 LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]

The main source of noise from railway at conventional speeds is rolling noise. The wheel and the rail surfaces are not perfectly smooth, but contain small-amplitude roughness. This roughness causes vibration of the wheel and rail which radiate noise. Within the LECAV project (LECture Acoustique de la Voie, i.e. Acoustic reading of railway track) a method is developed to use the sound radiated by the wheel and the rail to characterize acoustics parameters of wheel track system during train running. These parameters will allow estimating rail roughness spectrum and potentially track decay rate. This method requires to have control over the acoustic radiation of the wheel and rail in order to estimate the interaction force between the two elements in the contact zone. The first part of this communication is devoted to the presentation of a measurement campaign that has been carried out on a test train parked on a railway track. The second part of the paper deals with the post-processing method. Results of the estimated excitation force from the simultaneous measurement of the acoustic sound pressure and vibration of the wheel are compared to the measured one to validate the method

Mots clés: Acoustic; Vibration; Modal analysis; Wheel

Domaines: Acoustique [physics.class-ph]

Pierre-Emile Chartrain, Pierre-Olivier Mattei, Estelle Bongini. Experimental assessment of wheel/rail interaction force with rolling noise analysis. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810769⟩