The paper describes different strategies for establishing current design profiles from sea bed to water surface, for use in analysis of subsea installation activities, e.g. during a pipe laying process or for dynamic analysis of risers. Measured data covering a period of 3–4 years for more than 20 measurement depths are used in the study. We investigate 4 strategies for depth profiles: General Purpose Profile: an envelope of the set of n-year speeds for individual depths, with unidirectional current at all depths. Empirical Event Profile: essentially a measured current profile which is deemed to be “serious,” i.e. potentially governing for design, scaled to adequately reflect a required return period. Whether a profile is “serious” or not would depend on the application. Response Based Profile: defined as the most probable profile causing an extreme response. It is obtained from design point current speeds from a reliability analysis of a selected response, while applying a detailed stochastic current model. Alternatively, an envelope of most probable profiles might be used.
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ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering
June 10–15, 2007
San Diego, California, USA
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
0-7918-4269-X
PROCEEDINGS PAPER
Ocean Current Profiles for Subsea Installation and Design Analysis
O̸istein Hagen,
O̸istein Hagen
Det Norske Veritas, Baerum, Norway
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Kim J. Mo̸rk,
Kim J. Mo̸rk
Det Norske Veritas, Baerum, Norway
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Lars Ingolf Eide
Lars Ingolf Eide
Norsk Hydro ASA, Oslo, Norway
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O̸istein Hagen
Det Norske Veritas, Baerum, Norway
Kim J. Mo̸rk
Det Norske Veritas, Baerum, Norway
Lars Ingolf Eide
Norsk Hydro ASA, Oslo, Norway
Paper No:
OMAE2007-29613, pp. 523-531; 9 pages
Published Online:
May 20, 2009
Citation
Hagen, O, Mo̸rk, KJ, & Eide, LI. "Ocean Current Profiles for Subsea Installation and Design Analysis." Proceedings of the ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering. Volume 3: Pipeline and Riser Technology; CFD and VIV. San Diego, California, USA. June 10–15, 2007. pp. 523-531. ASME. https://doi.org/10.1115/OMAE2007-29613
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