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Modelling of squeal noise attenuation of ring damped wheels

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2004
auteur(s) Brunel Jean-François; Dufrenoy Philippe; Demilly François
journal Applied Acoustics
volume (numéro) 65 (5)
pages 457 – 471
résumé The called vibratory instability squeal that appears in narrow curve or in end of braking is today uncontrolled and produced a high pitched noise very intense and unbearable. Many systems have been developed to limit acoustic emissions and particularly the metallic ring damping solution. Attenuation can reach 20 dB depending on the wheel type (Corail, safety wheel, etc.). However, the question is why this system has a various efficiency even on similar wheels and if this solution may be optimized. The aim of this paper is to understand the attenuation mechanisms of the ring dampers. Wheel modes susceptible to squeal are highlighted and numerical models are developed in order to simulate how the acoustic attenuation occur.
mots clés Railway wheel; Metallic ring; Squeal; Acoustic
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