Band diagram and forced response analysis of periodic and quasi-periodic panels - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2019

Band diagram and forced response analysis of periodic and quasi-periodic panels

Résumé

The vast majority of structures introduce symmetry in one or two dimensions, which can be a periodicity in the case of constructing several identical unit cells. Periodic structures have found a big interest in engineering applications because they introduce frequency band effects, due to the impedance mismatch generated by periodic discontinuity in the geometry, which can improve the vibroacoustic performances. However, the presence of imperfections i.e. (defects, irregularity) in the structure, leads to a partial lost of regular periodicity (called quasi-periodic structure) that can have a noticeable impact on the vibrational and/or acoustic behaviour of the elastic system. The tailored irregularity, which is a designed loss of periodicity, can be used, therefore, to improve the dynamic behaviour of structures. In the present paper numerical studies on the vibrational analysis of two-dimensional non-planar periodic and quasi-periodic structures have been performed. The content deals with finite and infinite systems. The finite element models of solid structures focused on the band diagram analysis of the infinite systems and the forced responses of the finite structures. The quasi-periodicity is defined by invoking the Thue-Morse sequence for building the assigned variations (geometry) along the domain of finite element model. The wave characteristics in quasi-periodic panels, present some elements of novelty and could be considered for designing structural filters and controlling the properties of elastic waves.
Fichier principal
Vignette du fichier
SMART.pdf (1.87 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02414955 , version 1 (16-12-2019)

Identifiants

  • HAL Id : hal-02414955 , version 1

Citer

Safiullah Timorian, Morvan Ouisse, Noureddine Bouhaddi, Sergio de Rosa, Francesco Franco. Band diagram and forced response analysis of periodic and quasi-periodic panels. 9th ECCOMAS Thematic Conference on Smart Structures and Materials, Jul 2019, Paris, France. ⟨hal-02414955⟩
39 Consultations
44 Téléchargements

Partager

Gmail Facebook X LinkedIn More