Numerical study of flow-induced vibrations of cylinders under the action of nonlinear energy sinks (NESs)

Chen, D, Abbas, L, Wang, G, Xiaoting, R and Marzocca, P 2018, 'Numerical study of flow-induced vibrations of cylinders under the action of nonlinear energy sinks (NESs)', Nonlinear Dynamics, vol. 94, no. 2, pp. 925-957.


Document type: Journal Article
Collection: Journal Articles

Title Numerical study of flow-induced vibrations of cylinders under the action of nonlinear energy sinks (NESs)
Author(s) Chen, D
Abbas, L
Wang, G
Xiaoting, R
Marzocca, P
Year 2018
Journal name Nonlinear Dynamics
Volume number 94
Issue number 2
Start page 925
End page 957
Total pages 33
Publisher Springer Netherlands
Abstract An isolated two-dimensional circular cylinder with two linear degrees of freedom, parallel and perpendicular to the free-stream direction, and owning a nonlinear energy sink (NES) is investigated by fluid-structure interaction (FSI) simulations to assess vortex-induced vibrations (VIV) at moderate Reynolds numbers. Subsequently, the wake-induced vibration (WIV) of a pair of identical cylinders under the action of two NES in a tandem arrangement and in a proximity-wake interference regime is explored using the same approach. The NES parameters (mass, nonlinear stiffness and damping) are investigated to determine their effects on the dynamic response of a single degree of freedom (in transverse flow direction) coupled system by a reduced-order model based on an experimentally validated van der Pol oscillator. The CFD model coupled with FSI method is also validated against VIV experimental data for an isolated cylinder in a uniform flow. The study is aimed to investigate the effect of the passive suppression NES device on VIV and WIV. The amplitude response, trajectories of cylinder motion and temporal evolutions of vortex shedding are obtained by conducting a series of numerical simulations. It is found that placing a tuned NES in the cylinders can provide good suppression effect; however, the effectiveness is function of the reduced velocity.
Subject Aerospace Structures
Keyword(s) Fluid-structure interaction
Nonlinear energy sink
Passive suppression device
Van der Pol oscillator
Vortex-induced vibrations
Wake-induced vibrations
DOI - identifier 10.1007/s11071-018-4402-z
Copyright notice © Springer Nature B.V. 2018
ISSN 0924-090X
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