Preliminary study of acoustic protection of Ariane V fairings using layers of porous materials - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2005

Preliminary study of acoustic protection of Ariane V fairings using layers of porous materials

Jamil Kanfoud
  • Fonction : Auteur
M.A. Hamdi
  • Fonction : Auteur

Résumé

During lift-off, space launchers are submitted to high level acoustic loads which may damage the payloads. High cost acoustic absorbers have been previously developed by to protect the payload in Ariane V. CNES launched a program in order to reduce the cost by using a layer of porous materials protected by a fabric. The purpose of this paper is to propose a 1D model of porous layers based on modified BIOT equations. This model has been validated by impedance tube measurements (absorption coefficient) performed by RIETER) and the ENTPE. Based on this model, a parametric study of the material mechanical and acoustic parameters has been carried out with respect of aerospace constraints. The study shows the relevance of the resistivity and the mechanical parameters of the skeleton for the absorption. The effect of the mounting conditions has also been studied experimentally and theoretically. Results reveal the importance of the constraints on the absorption mainly at the low frequency range.
Fichier principal
Vignette du fichier
Hamdi_2005.pdf (97.02 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-01812942 , version 1 (12-06-2018)

Licence

Domaine public

Identifiants

  • HAL Id : hal-01812942 , version 1

Citer

Jamil Kanfoud, M.A. Hamdi. Preliminary study of acoustic protection of Ariane V fairings using layers of porous materials. 7e colloque national en calcul des structures, CSMA, May 2005, Giens, France. ⟨hal-01812942⟩
26 Consultations
32 Téléchargements

Partager

Gmail Facebook X LinkedIn More