A modified wake oscillator model for vortex-induced vibration of circular cylinders for a wide range of mass-damping ratio

Farshidianfar, Anoshirvan; Zanganeh, Hossein

doi:10.1016/j.jfluidstructs.2009.11.005

Cited by 67 publications

(18 citation statements)

References 30 publications

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“…Based on some comparisons with experimental results of rigid cylinders, Facchinetti et al (2004) recommended the acceleration coupling model. However, this model has recently been commented by Farshidianfar and Zanganeh (2010) who showed, on the other hand, the superior results of the velocity coupling model. Hence, the velocity coupling term is herein chosen by considering and modifying the Skop and Balasubramanian's model.…”

Section: Nonlinear Structural and Hydrodynamic Modelsmentioning

confidence: 99%

Multi-mode interactions in vortex-induced vibrations of flexible curved/straight structures with geometric nonlinearities

Srinil

2010

Journal of Fluids and Structures

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Section: Nonlinear Structural and Hydrodynamic Modelsmentioning

confidence: 99%

Multi-mode interactions in vortex-induced vibrations of flexible curved/straight structures with geometric nonlinearities

Srinil

2010

Journal of Fluids and Structures

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“…The Landl model was modified, while neglecting Ω so as to keep the recently modified model attributes intact, in comparison to the main classic model in Equation (5). Next, the final modified equation was introduced as suggested by Farshidianfar and Dolatabadi (2013), as given in the following:…”

Section: Modification Of Coupling Model Using Classical Modelmentioning

confidence: 99%

Modified wake oscillator model for vortex-induced motion prediction of low aspect ratio structures

Rahman

Hussin

Mohd

et al. 2019

Ships and Offshore Structures

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Modified wake oscillator model for vortex-induced motion prediction of low aspect ratio structures Floating structures, such as Spar platform, are likely to experience significant motions while operation due to Vortex-induced Motion (VIM). The main features of VIM include aspect ratio and mass ratio of the structure. This paper focuses on further development of a previously published semi-empirical method called wake oscillator model (WOM) for VIM, which aims to derive a mathematical correlation in modelling all features of the phenomenon. Analytical solution is proposed to coupled WOM and structure oscillator model based on the Van der Pol equation by integrating mass ratio, m* = 4.36, and various low aspect ratios between 0.3 and 2.0. Additionally, a new approach was initiated to embed several empirical parameters linked to the aspect ratio in the existing WOM. It was found the aspect ratio parameter in the modified WOM significantly affected the performance of the model for estimation of VIM on floating structures.

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“…However, due to the fact that the concepts of focusing on collecting power by VIV are proposed in recent decades, it has to be taken into account in the design of microelectronics devices and electrical equipment like sensors requiring for sustaining power supply [6][7][8]. As a development of models focusing on crosswise VIV which follow the idea of a wake oscillator model [19][20][21][22], a variable model of the fluctuating nature of vortex shedding was created to describe the wake dynamics and it was conceived to satisfy a Van der Pol or Rayleigh equation modelling a self-sustained oscillation of finite amplitude [11]. Thus, a second-order nonlinear equation has to be solved to get the vibrational amplitude to catch the energy of the vortex shedding.…”

Section: Introductionmentioning

confidence: 99%

Energy Harvester Based on the Synchronization Phenomenon of a Circular Cylinder

Wang

Ran

Zhang

2014

Mathematical Problems in Engineering

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A concept of generating power from a circular cylinder undergoing vortex-induced vibration (VIV) was investigated. Two lead zirconate titanate (PZT) beams which had high power density were installed on the cylinder. A theoretical model has been presented to describe the electromechanical coupling of the open-circuit voltage output and the vibration amplitudes based on a second-order nonlinear Van der pol equation and Gauss law. A numerical computation was applied to measure the capacity of the power generating system. The lift and drag coefficient and the vortex shedding frequency were obtained to verify how the nondimensional parameter reduced velocityUraffects the fluid field. Meanwhile, a single-degree of freedom system has been added to describe the VIV, presynchronization, and synchronization together with postsynchronization regimes of oscillating frequencies. And the amplitudes of the vibration have been obtained. Finally, the vibrational amplitudes and the voltage output could go up to a high level in the synchronization region. The maximum value of the voltage output and the corresponding reduced velocityUrwere 8.42 V and 5.6, respectively.

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A modified wake oscillator model for vortex-induced vibration of circular cylinders for a wide range of mass-damping ratio

Cited by 67 publications

References 30 publications

Multi-mode interactions in vortex-induced vibrations of flexible curved/straight structures with geometric nonlinearities

Multi-mode interactions in vortex-induced vibrations of flexible curved/straight structures with geometric nonlinearities

Modified wake oscillator model for vortex-induced motion prediction of low aspect ratio structures

Energy Harvester Based on the Synchronization Phenomenon of a Circular Cylinder

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