Tyre/road noise horn effect: 2D modelling by analytical and numerical models
ANFOSSO-LEDEE ; KLEIN ; FADAVI ; DUHAMEL
Type de document
COMMUNICATION AVEC ACTES NATIONAL (ACTN)
Langue
francais
Auteur
ANFOSSO-LEDEE ; KLEIN ; FADAVI ; DUHAMEL
Résumé / Abstract
Horn effect is an amplification of noise generated by the contact between tyres and road surface, due to multiple reflections between the tyre circumference and the road surface. This effect is reduced for porous road surface because of sound absorption properties. This amplification effect has to be taken into account in a general model for tyre/road noise. A first analytical approach was implemented. It is based on an existing model using modal decomposition of the sound pressure. A 2d solution in case of all purely reflecting surfaces is obtained in a reasonable computation time. The excitation can be an acoustic source placed near the contact patch, or a vibration distribution on the contour of the tyre. Sound pressure amplification is calculated near the tyre. In order to introduce sound absorption on the road surface, a 2d direct boundary element method (BEM) was used. Porous pavement is described by a phenomenological model, and a non local type of surface reaction is considered. The analytical and BEM approaches, are compared in terms of amplification spectrum for reflecting surfaces. The effect of road surface absorption is also discussed.
