Linear stability approach to explain lock-in transition and time sharing in vortex-induced vibrations of slender structures
International audience 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 s...
Published in: | Volume 5: Polar and Arctic Sciences and Technology; CFD and VIV |
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Main Authors: | , , |
Other Authors: | , , , , |
Format: | Conference Object |
Language: | English |
Published: |
HAL CCSD
2009
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Subjects: | |
Online Access: | https://hal-polytechnique.archives-ouvertes.fr/hal-01025996 https://doi.org/10.1115/OMAE2009-80132 |
Summary: | International audience 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. Copyright © 2009 by ASME. |
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