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Coupling Between In-Line and Transverse VIV Response

[+] Author Affiliations
Erling Huse

MARINTEK, Trondheim, Norway

Finn Gunnar Nielsen

Norsk Hydro, Bergen, Norway

Tore So̸reide

Reinertsen Engineering, Trondheim, Norway

Paper No. OMAE2002-28618, pp. 835-847; 13 pages
doi:10.1115/OMAE2002-28618
From:
  • ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering
  • 21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 1
  • Oslo, Norway, June 23–28, 2002
  • Conference Sponsors: Ocean, Offshore, and Arctic Engineering Division
  • ISBN: 0-7918-3611-8 | eISBN: 0-7918-3599-5
  • Copyright © 2002 by ASME

abstract

Most present-day programs for engineering prediction of VIV response are based on experimental lift and mass coefficients derived from 2D tests, where the cylinder has been constrained in in-line direction. The present paper describes a preliminary investigation into the coupling between in-line and transverse VIV response. A simple pendulum test set-up was used to study how the in-line response influenced the transverse one. For reduced velocities above 5, when the in-line oscillation frequency was exactly twice the transverse frequency, it was found that the transverse response was significantly reduced when allowing the cylinder to oscillate in both directions simultaneously, compared to the case when it was constrained in-line.

Copyright © 2002 by ASME

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