Modélisation et expérimentation du contact pneumatique/chaussée pour réduire l'impact acoustique des revêtements routiers

Tyre/road noise abatement could be reached by improving the acoustical performances of pavements. At the origin of the problem, the theoretical and experimental study of the dynamic contact between the tyre and the road is essential to improve noise prediction. The quasi-static hypothesis is made and the tyre tread is approached by an elastic or viscoelastic halfspace. A novel multi-asperity approach is used to solve the contact problem by means of a two-scale iterative method, which enables the calculation of the normal contact stresses between a tyre and an actual road surface in the time domain. Firstly, the multi-asperity approach is experimentally validated in static contact conditions. Then, by means of a specific test rig, the quasi-static assumption is checked in the case of reduce-sized pneumatic tyre rolling on a single asperity. However, measurements on a test track show that this hypothesis becomes uncorrect above a certain frequency due to the possible influence of tyre radial vibrations. From a texture/noise database, statistical relationships between calculated contact force spectra and measured noise spectra are established, leading to an estimate of low frequency noise due to tyre vibrations. Finally, within the framework of international projects, low noise road surfaces have been developed and proved their efficiency for noise reduction, among which very thin asphalt concretes with low grading and poroelastic road surfaces.

Language

  • French

Media Info

  • Media Type: Digital/other

Subject/Index Terms

Filing Info

  • Accession Number: 01688784
  • Record Type: Publication
  • Source Agency: Institut Francais des Sciences et Technologies des Transports, de l'Amenagement et des Reseaux (IFSTTAR)
  • Files: ITRD
  • Created Date: Dec 18 2018 10:14AM