Linear stability approach to explain lock-in transition and time sharing in vortex-induced vibrations of slender structures
Résumé
In this paper, we use a linearized version of a wake oscillator model in order to understand VIV of flexible structures. By a simple analytical development on the stability of an infinite cable/wake system, we demonstrate the existence a temporal instability. The theoretical study is pushed further to finite structure, a tensioned cable, for which modes frequency, amplitude growth rate in time and velocity range of instability are easily derived. The developed concepts are used to explain experimentally observed behaviours of a low flexural rigidity tensioned beam undergoing VIV.
Domaines
Physique [physics]Origine | Fichiers produits par l'(les) auteur(s) |
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