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An Assessment of EOF Current Scatter Diagrams With Respect to Riser VIV Fatigue Damage

[+] Author Affiliations
Trond Stokka Meling, Kenneth Johannessen Eik, Einar Nygaard

Statoil, Stavanger, Norway

Paper No. OMAE2002-28062, pp. 85-93; 9 pages
doi:10.1115/OMAE2002-28062
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

The accuracy of current modelling is critical when considering deepwater riser fatigue damage caused by vortex-induced vibrations (VIV). In the present study the use of empirical orthogonal functions (EOF) to extract the governing characteristics from huge amounts of current measurements has been assessed. The amplitudes of the time varying principal components (PC) have been organized into bins in scatter diagrams. The accuracy of this scatter diagram approach with different numbers of EOF modes involved has been evaluated in terms of riser VIV fatigue damage.

Copyright © 2002 by ASME

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