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Reliability Based Factors of Safety for VIV Fatigue Using NDP Riser High Mode VIV Tests

[+] Author Affiliations
E. Fontaine, H. Marcollo

AMOG Consulting, Notting Hill, VIC, Australia

K. Vandiver, M. Triantafyllou

M.I.T., Cambridge, MA

C. Larsen

NTNU, Trondheim, Norway

M. Tognarelli

BP America Production Co., Houston, TX

Y. Constantinides

Chevron, Houston, TX

O. Oakley

Chevron, San Ramon, CA

Paper No. OMAE2011-49820, pp. 511-522; 12 pages
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 7: CFD and VIV; Offshore Geotechnics
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4439-7
  • Copyright © 2011 by ASME


Understanding the level of conservatism in a riser system design for vortex-induced vibration (VIV) fatigue is an important issue for operators. This study represents a demonstration of the calibration methodology to derive consistent values for the Factor of Safety (FoS). The exercise is performed here based on medium scale VIV data and utilizing the most commonly used VIV prediction software by industry. The results emphasize the need for (i) a coherent approach to estimate the FoS to be used and (ii) monitoring/measurement of software improvements as this may increase risk of failure if the influence of such improvements on the FoS is not quantified.

Copyright © 2011 by ASME



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