Modal Overlap Factor of a beam with an acoustic black hole termination - Archive ouverte HAL
Journal Articles Journal of Sound and Vibration Year : 2014

Modal Overlap Factor of a beam with an acoustic black hole termination

Abstract

Acoustic Black Hole (ABH) effect is a passive vibration reduction technique which takes advantage of properties of wave propagation in thin structures of varying thickness. A practical implementation of ABH on a uniform beam consists in an extremity whose thickness follows a power-law profile covered by a very thin layer of additional damping material. A modal analysis based on a High Resolution technique shows that the ABH significantly increases the Modal Overlap Factor (MOF) of the beam, thus reducing the resonant behaviour of the structure. Further investigations, including a two dimensional numerical model of the structure based on the finite difference method, show that this MOF can be explained by an increase of the modal density and a high damping of a number of modes of the structure due to the ABH.
Fichier principal
Vignette du fichier
Denis14_preprint.pdf (975.67 Ko) Télécharger le fichier
Origin Files produced by the author(s)
Loading...

Dates and versions

hal-01288274 , version 1 (14-03-2016)

Identifiers

Cite

Vivien Denis, Adrien Pelat, François Gautier, Benjamin Elie. Modal Overlap Factor of a beam with an acoustic black hole termination. Journal of Sound and Vibration, 2014, 333 (12), pp.2475-2488. ⟨10.1016/j.jsv.2014.02.005⟩. ⟨hal-01288274⟩
186 View
492 Download

Altmetric

Share

More