Parametric study of a metaporous made of solid inclusions embedded in a rigid frame porous material - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2012

Parametric study of a metaporous made of solid inclusions embedded in a rigid frame porous material

Clément Lagarrigue
  • Fonction : Auteur correspondant
  • PersonId : 939264

Connectez-vous pour contacter l'auteur
Olivier Dazel

Résumé

With the growing interest for sound absorbing materials, research is brought to optimize porous material whose acoustic absorption coefficient should to remain large across a broad frequency range. Embedding rigid inclusions in a porous plate can enhance its acoustical properties and create an efficient sound insulating material for low frequencies. The excitation of additional acoustic modes when periodic arrangements of inclusions are used can lead to enhanced acoustic energy dissipation due to the viscous and thermal effects in the material pores when the wavelength is comparable with the radius of the inclusions. By acting on the characteristics of individual cells (periodicity, shape, type ...), it is possible to combine absorption related to the medium with additional resonant effects at low frequencies. A parametric study is performed in order to determine the influence of the geometry, orientation and resonance frequency of infinitely rigid inclusions embedded in a porous plate. The behavior of these structured materials is computed by finite element method to determine the "optimal" inclusion in order to obtain an efficient absorbing material.
Fichier principal
Vignette du fichier
hal-00810737.pdf (733.44 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-00810737 , version 1 (23-04-2012)

Identifiants

  • HAL Id : hal-00810737 , version 1

Citer

Clément Lagarrigue, Olivier Dazel, Jean-Philippe Groby, Vincent Tournat. Parametric study of a metaporous made of solid inclusions embedded in a rigid frame porous material. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810737⟩
289 Consultations
220 Téléchargements

Partager

Gmail Facebook X LinkedIn More