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Forced Vibration Tests for In-Line VIV to Assess Partially Strake-Covered Pipeline Spans

Forced Vibration Tests for In-Line VIV to Assess Partially Strake-Covered Pipeline Spans

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Sammendrag
A series of experiments is performed in which a strake-covered rigid cylinder undergoes harmonic purely in-line motion while subject to a uniform “flow” created by towing the test rig along SINTEF Ocean’s towing tank. These tests are performed for a range of frequencies and amplitudes of the harmonic motion, to generate added-mass and excitation functions are derived from the in-phase and 90° out-of-phase components of the hydrodynamic force on the pipe, respectively. Using these excitation- and added-mass functions in VIVANA together with those from experiments on bare pipe by Aronsen (2007), the in-line VIV response of partially strake-covered pipeline spans is calculated. It is found that as little as 10% strake coverage at the optimal location effectively suppresses pure in-line VIV. Further advantages of strakes rather than intermediate supports to suppress in-line VIV include: strakes are not affected by the scour which can lower an intermediate support (in addition to creating the span in the first place). Further they do not prevent self-lowering of the pipeline or act as a point of concentration of VIV damage as the spans to each side of the intermediate support grow again.
Språk
Engelsk
Forfatter(e)
  • Wu Jie
  • Yin Decao
  • Passano Elisabeth
  • Lie Halvor
  • Peek Ralf
  • Sequeiros Octavio E.
  • Ang Sze
  • Bernardo Chiara
  • Atienza Meliza
Institusjon(er)
  • SINTEF Ocean / Energi og transport
  • Spania
  • Nederland
  • Filippinene
År
2019
Publisert i
International Conference on Offshore Mechanics and Arctic Engineering (OMAE) [proceedings]
ISSN
1523-651X
Forlag
The American Society of Mechanical Engineers (ASME)
Bok
ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2019): Volume 2: CFD and FSI
Hefte nr.
Volume 2
ISBN
978-0-7918-5877-6