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

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 R...

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Vydáno v:Nonlinear dynamics Ročník 94; číslo 2; s. 925 - 957
Hlavní autoři: Dongyang, Chen, Abbas, Laith K., Guoping, Wang, Xiaoting, Rui, Marzocca, Pier
Médium: Journal Article
Jazyk:angličtina
Vydáno: Dordrecht Springer Netherlands 01.10.2018
Springer Nature B.V
Témata:
Automotive Engineering
Circular cylinders
Classical Mechanics
Computational fluid dynamics
Computer simulation
Control
Cylinder liners
Damping
Degrees of freedom
Dynamic response
Dynamical Systems
Engineering
Flow generated vibrations
Fluid flow
Mathematical models
Mechanical Engineering
Original Paper
Parallel degrees of freedom
Reduced order models
Stiffness
Uniform flow
Vibration
Vortex shedding
Vortex-induced vibrations
Nonlinear energy sink
Vortex-induced vibrations
Fluid–structure interaction
Van der Pol oscillator
Wake-induced vibrations
Passive suppression device
ISSN:0924-090X, 1573-269X
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Popis
Shrnutí: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.
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ISSN:0924-090X
1573-269X
DOI:10.1007/s11071-018-4402-z