Investigation of the interwire energy transfer of elastic guided waves inside prestressed cables - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of the Acoustical Society of America Année : 2016

Investigation of the interwire energy transfer of elastic guided waves inside prestressed cables

Résumé

Elastic guided waves are of interest for the non-destructive evaluation of cables. Cables are most often multi-wire structures, and understanding wave propagation requires numerical models accounting for the helical geometry of individual wires, the interwire contact mechanisms and the effects of prestress. In this paper, a modal approach based on a so-called semi-analytical finite element method and taking advantage of a biorthogonality relation is proposed in order to calculate the forced response under excitation of a cable, multi-wired, twisted and prestressed. The main goal of this paper is to investigate how the energy transfers from a given wire, directly excited, to the other wires in order to identify some localization of energy inside the active wire as the waves propagate along the waveguide. The power flow of the excited field is theoretically derived and an energy transfer parameter is proposed to evaluate the level of energy localization inside a given wire. Numerical results obtained for different polarizations of excitation, central and peripheral, highlight how the energy may localize, spread or strongly change in the cross-section as waves travel along the axis. In particular, a compressional mode localized inside the central wire is found, with little dispersion and significant excitability.
Fichier principal
Vignette du fichier
doc00027742.pdf (1.46 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01589912 , version 1 (19-09-2017)

Identifiants

Citer

Fabien Treyssede. Investigation of the interwire energy transfer of elastic guided waves inside prestressed cables. Journal of the Acoustical Society of America, 2016, 140 (1), 13p. ⟨10.1121/1.4955080⟩. ⟨hal-01589912⟩
53 Consultations
133 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More