Passive Control of Vortex-Induced Vibrations: An Overview

Kumar, R. Ajith; Sohn, Chan-Hyun; Gowda, B. H. Lakshmana

doi:10.2174/1874477x10801010001

Cited by 32 publications

(33 citation statements)

References 18 publications

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“…In its broadest sense, FIM can be divided into five. These are vortex-induced vibration (VIV) (Bearman 1984, Bernitsas et al Gabbai and Benaroya 2005, Kumar et al 2008, Sarpkaya 1979, Williamson and Govardhan 2004, galloping (Richardson et al 1965, Chang et al 2001, coexistence of VIV and galloping , buffeting (Blevins 2001) and gap-flow in multi-body interaction (Assi et al 2006and 2010, Zdravkovich 1988, Zdravkovich and Medeiros 1991. This paper deals with only VIV of FIM.…”

Section: Introductionmentioning

confidence: 96%

URANS-Based Prediction of Vortex Induced Vibrations of Circular Cylinders

Dobrucali

Kınacı

2017

JAFM

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Vortex induced vibrations (VIV) are highly nonlinear due to three different frequencies involved in the process; fluid force frequency, vortex shedding frequency and oscillation frequency. It is computationally complex to solve such a chaotic fluid flow but recent progress in numerical algorithms, turbulence models and computer capabilities have made it easier to approach the problem with a nonlinear approach. These developments have paved the way to approach the problem with the simple equation of motion of Newton's law and when coupled with URANS, which is a commonly used method in solving problems related to fluid flow, the highly nonlinear problem of vortex induced vibrations become solvable. The existing literature computationally can only handle flows for > 10,000 − 12,000 but the numerical methodology adopted in this study furthers this limitation. The numerical algorithm is first tried for a stationary cylinder and the boundary layer separation is investigated for higher . The generated results are found to be satisfactory to proceed solving for VIV at high . The solution strategy is tested in a wide range of Reynolds number with different springs and damping coefficients. Satisfactory agreement is found with the experiments for a cylinder in VIV. The shortcomings of the computational work and why these limitations arise are tried to be explained using the experimental results and the existing mathematical models.

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Section: Introductionmentioning

confidence: 96%

URANS-Based Prediction of Vortex Induced Vibrations of Circular Cylinders

Dobrucali

Kınacı

2017

JAFM

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“…The VIV mechanism and previous studies have been reviewed by Sarpkaya [1,2] Bearman [3,4], Williamson and Govardhan [5], [6], Gabbai and Benaroya [7], Kumar et al [8], and Wu and Hong [9]. VIV is a complicate nonlinear dynamics problem.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of vortex-induced vibration for drilling risers under uniform flow current

Mao¹,

Liu²,

Zhou³

et al. 2017

J. vibroeng.

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Abstract. An experiment was conducted in a deep water basin to investigate the vortex-induced vibration mechanism of a drilling riser. Various measurements were obtained by the fiber Bragg grating strain sensors, and data was analyzed by modal analysis method. Results show that the vibration mode of the drilling riser increases with the increasing flow velocity, and the vibration amplitude in the CF direction is larger than that in the IL direction. The vibrations in the CF and IL directions interact and mutually affect each other. The vibration mode in the IL direction is usually larger than that in the CF direction as the dominant vibration frequency is twice of that in the CF direction. Higher stresses may occur rather in the IL direction than in the CF direction. Hence, fatigue induced by the IL direction should also be taken into consideration when analyzing the fatigue life of a drilling riser. The three-time harmonic appears, and the phenomenon becomes more obvious as the flow velocity increased for the effect of the "2T" wake mode under the experiment condition. Displacement trajectories are significantly influenced by dominant vibration frequency and phase angle between the CF and IL directions. Crescent shapes, figure-eight, and inclined figure-eight are appeared in the experiment with the increasing flow velocity.

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“…There are many reasons that may result in the damages to pipelines and these damages are often associated with pipeline vibrations. For example, vortex can lead to continuous vibrations of subsea pipeline and reduce its fatigue life (Kumar et al 2008); vibrations induced by strong earthquakes may induce excessive stresses in the pipe wall and result in damage (Zeinoddini et al 2012). Therefore, it is important to control pipeline vibrations to reduce the possibility of catastrophic damages.…”

Section: Introductionmentioning

confidence: 99%

The effectiveness of using viscoelastic materials to reduce seismic induced vibrations of above ground pipelines

Bi¹,

Hong²

2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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Pipeline systems are commonly used to transport oil, natural gas, water, sewage and other materials. They are normally regarded as important lifeline structures. Ensuring the safety of these pipeline systems is crucial to the economy and environment. There are many reasons that may result in the damages to pipelines and these damages are often associated with pipeline vibrations. Therefore it is important to control pipeline vibrations to reduce the possibility of catastrophic damages. This paper carries out numerical investigations on the effectiveness of using viscoelastic material layers to mitigate seismic induced vibrations of above ground pipelines. The numerical analyses are carried out by using the commercial finite element code ANSYS. The numerical model of the viscoelastic material is firstly calibrated based on the experimental data obtained from a 1.6m long tubular sandwich structure. The calibrated material model is then applied to the pipeline system. The effectiveness of using viscoelastic materials as the seismic vibration control solution is discussed.

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Passive Control of Vortex-Induced Vibrations: An Overview

Cited by 32 publications

References 18 publications

URANS-Based Prediction of Vortex Induced Vibrations of Circular Cylinders

URANS-Based Prediction of Vortex Induced Vibrations of Circular Cylinders

Experimental study of vortex-induced vibration for drilling risers under uniform flow current

The effectiveness of using viscoelastic materials to reduce seismic induced vibrations of above ground pipelines

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