A practical approach to predicting cross-flow and in-line VIV response for deepwater risers

Xue, Hong; Wang, Kunpeng; Tang, Wenyong

doi:10.1016/j.apor.2015.05.005

Cited by 33 publications

(10 citation statements)

References 24 publications

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“…Past studies found that the dominant modes were related to the incoming flow velocity profile (Huang et al, 2011a) and the IL VIV should not be neglected in deepwater riser design (Tognarelli et al, 2004;Xue et al, 2015). However, most of the previous CFD studies on vertical riser VIV focussed on a single flow condition and the importance of the IL fatigue damage, especially at low flow velocities, was not fully addressed.…”

Section: Introductionmentioning

confidence: 93%

Numerical simulation of vortex-induced vibration of a vertical riser in uniform and linearly sheared currents

Wang

Xiao

2016

Ocean Engineering

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This paper presents a numerical study on vortex-induced vibration (VIV) of a vertical riser subject to uniform and linearly sheared currents. The model vertical riser tested at the MARINTEK by ExxonMobil is considered. The predicted numerical results are in good agreement with the experimental data. It is found that the dominant mode numbers, the maximum root mean square amplitudes, the dominant frequencies and the fatigue damage indices increase with the flow velocity. A standing wave response is observed for the single-mode in-line (IL) and cross-flow (CF) vibrations. Dual resonance is found to occur at most of the locations along the riser. At some locations along the riser, a third harmonic frequency component is observed in the CF response and a frequency component at the CF response frequency is found in the IL response apart from the frequency component at twice the CF response frequency. The majority of the vortex shedding shows a clear 2S pattern, whereas a 2P mode is observed near the position where the maximum vibration amplitude appears. The higher IL fatigue damage in the present study emphasises the importance of the IL fatigue damage especially in the design of low flow velocity or low mode number applications

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Section: Introductionmentioning

confidence: 93%

Numerical simulation of vortex-induced vibration of a vertical riser in uniform and linearly sheared currents

Wang

Xiao

2016

Ocean Engineering

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“…The revised damping model dissipated approximately the same amount of energy in each cycle to that dissipated by the original model. The phases of lift force and cross-flow velocity at each time step always tended to be synchronized Xue et al (2015). predicted the coupled in-line and cross-flow VIV of marine risers in the time domain.…”

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confidence: 75%

Improving time-domain prediction of vortex-induced vibration of marine risers

Zhang

Qiu

2017

Mar Syst Ocean Technol

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As offshore exploration and production is moving into deepwaters, the prediction of the Vortex-Induced Vibration (VIV) of marine risers becomes a critical issue in the design process. VIV can lead to a reduced fatigue life and even the structural failure of the riser. Currently, frequency-domain models are widely used in the offshore industry to predict riser VIV. However, the nonlinearities encountered in complex deepwater environments make linear approaches unreliable. In contrast, time-domain models Table of Contents Abstract ii Acknowledgments iv Table of Contents viii List of Tables ix List of Figures xiv Nomenclature xiv σ Root-mean-square operator ω Cross-flow motion angular frequency xx

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“…is is probably due to significantly larger response amplitudes than what is observed in the in-line direction [9]. However, in later years, in-line vibrations and the combination of cross-flow and in-line VIV have become a larger focus area [9][10][11][12]. e top of the riser is connected with the platform which has motions (surge and heave) in ocean waves.…”

Section: Introductionmentioning

confidence: 94%

Numerical and Experimental Research on the Effect of Platform Heave Motion on Vortex‐Induced Vibration of Deep Sea Top‐Tensioned Riser

Zhang

Zeng

Tang

et al. 2021

Shock and Vibration

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The prediction and control of vortex-induced vibration (VIV) is one of the key problems for riser design. The effect of platform heave motion on VIV of deep sea top-tensioned riser (TTR) is presented by means of numerical simulation and experiment in this research. First, the heave motion was modeled as a parametric excitation, and the governing equation of VIV of riser considering the parametric excitation was established. Then, the dynamic response of TTR was calculated numerically by the finite difference method based on the Van der Pol wake-oscillator model. Finally, a validation experiment was carried out at the towing tank of Tianjin university. The results show that the VIV response at the bottom of riser is significantly increased due to the platform heave motion, especially in the situation of low current velocity. The larger amplitude and the higher frequency of the platform heave motion with the greater influence are generated on VIV of TTR. In particular, the value of 0.5 times, 1 time, or other multiples of the platform heave frequency will be included in the vibration frequency component of TTR when the platform heave amplitude is large and the frequency is high.

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A practical approach to predicting cross-flow and in-line VIV response for deepwater risers

Cited by 33 publications

References 24 publications

Numerical simulation of vortex-induced vibration of a vertical riser in uniform and linearly sheared currents

Numerical simulation of vortex-induced vibration of a vertical riser in uniform and linearly sheared currents

Improving time-domain prediction of vortex-induced vibration of marine risers

Numerical and Experimental Research on the Effect of Platform Heave Motion on Vortex‐Induced Vibration of Deep Sea Top‐Tensioned Riser

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