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On Vessel Motion Induced Vortex-Induced Vibrations of a Steel Lazy Wave Riser

Abstract

Deepwater steel lazy wave risers (SLWR) subject to vessel motion will be exposed to time-varying oscillatory flow, vortices could be generated and the cyclic vortex shedding force causes the structure vibrate, such fluid-structure interaction is called vortex-induced vibrations (VIV). To investigate VIV on a riser with non-linear structures under vessel motion and oscillatory flows, time domain approaches are needed. In this study, a time-domain approach is used to simulate a full-scale SLWR. Two cases with simplified riser top motions are simulated numerically. By using default input parameters to the time domain approach, the key oscillatory flow induced VIV response characteristics such as response frequency, curvature and displacements are examined and discussed. More accurate VIV prediction could be achieved by using realistic hydrodynamic inputs into the time domain model.

Category

Academic chapter

Language

English

Author(s)

Affiliation

  • SINTEF Ocean / Energi og transport

Year

2021

Publisher

The American Society of Mechanical Engineers (ASME)

Book

ASME 2021 40th International Conference on Ocean, Offshore and Arctic Engineering. Volume 4: Pipelines, Risers, and Subsea Systems

ISBN

9780791885147

View this publication at Norwegian Research Information Repository