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Research Papers: Piper and Riser Technology

Numerical Vortex-Induced Vibration Prediction of Marine Risers in Time-Domain Based on a Forcing Algorithm

[+] Author and Article Information
Peter Ma

Ocean Engineering Research Centre,
Memorial University of Newfoundland,
St. John's, NL, A1B 3X5, Canada

Wei Qiu

Ocean Engineering Research Centre,
Memorial University of Newfoundland,
St. John's, NL, A1B 3X5, Canada
e-mail: qiuw@mun.ca

Don Spencer

Oceanic Consulting Corporation,
St. John's, NL, A1B 2X5, Canada

1Corresponding author.

Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received April 28, 2012; final manuscript received April 3, 2014; published online May 6, 2014. Assoc. Editor: Thomas E. Schellin.

J. Offshore Mech. Arct. Eng 136(3), 031703 (May 06, 2014) (9 pages) Paper No: OMAE-12-1043; doi: 10.1115/1.4027385 History: Received April 28, 2012; Revised April 03, 2014

Vortex-induced vibration (VIV) of marine risers poses a significant challenge as the offshore oil and gas industry moves into deep water. A time-domain analysis tool has been developed to predict the VIV of marine risers based on a forcing algorithm and by making full use of the available high Reynolds number experimental data. In the formulation, the hydrodynamic damping is not treated as a special case but simply an extension of the experimentally derived lift curves. The forcing algorithm was integrated into a mooring analysis program based on the global coordinate-based finite element method. At each time step, the added mass, lifting force, and drag force coefficients and their corresponding loads are computed for each element. Validation studies have been carried out for a full-scale rigid riser segment and a model-scale flexible riser. The numerical results were compared with experimental data and solutions by other programs.

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References

Figures

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Fig. 1

Lift coefficient curves as function of state variables (A*, VR)

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Fig. 2

Venugopal's damping model for low and high VR

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Fig. 3

Lift coefficient curve (rotated view)

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Fig. 4

Zero-crossing analysis of a VIV cycle [4]

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Fig. 5

Interpolation grid

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Fig. 6

Rigid riser VIV for uniform current speed of 1.1 m/s

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Fig. 7

Rigid riser VIV for uniform current speed of 1.6 m/s

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Fig. 8

Rigid riser VIV for uniform current speed of 1.8 m/s

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Fig. 9

Rigid riser VIV for uniform current speed of 2.4 m/s

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Fig. 10

Rigid riser VIV for uniform current speed of 2.6 m/s

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Fig. 11

Amplitude ratio versus nominal reduced velocity

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Fig. 12

Delft VIV experimental setup [13]

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Fig. 13

Case 1—Time series of cross-flow vibration at the middle of the riser

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Fig. 14

Case 1—Cross-flow vibration envelope

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Fig. 15

Case 3—Time series of cross-flow vibration at the middle of the riser

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Fig. 16

Case 3—Cross-flow vibration envelope

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Fig. 17

Case 6—Time series of cross-flow vibration at the middle of the riser

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Fig. 18

Case 6—Cross-flow vibration envelope

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Fig. 19

Case 9—Time series of cross-flow vibration at the middle of the riser

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Fig. 20

Case 9—Cross-flow vibration envelope

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Fig. 21

Maximum cross-flow vibration by all models

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Fig. 22

Minimum cross-flow vibration by all models

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