In the design of risers, current profiles modelling is of great importance. In this paper, various aspects to derive a reliable statistical modelling of currents profiles are considered. First, the reduction of current profiles is treated by mean of the EOF (Empirical and Orthogonal Function) method. In contrast to other studies that have utilized this technique, the information of direction is considered. Secondly, we propose a technique based on B-splines smoothing to identify time series of the different time scales. This can be of utility for a better understanding of some specific events or to improve numerical models. Finally, the efficiency and accuracy of the proposed approach is studied by comparing measured current profiles with those reconstructed from EOF method, by mean of extreme value analysis, using two simple criteria. The first one is based on static calculation and the second is derived from a VIV analysis.
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ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering
June 15–20, 2008
Estoril, Portugal
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4821-0
PROCEEDINGS PAPER
Statistical Modelling of Current Profiles for a Riser Reliability Design Available to Purchase
Ignace D. Mendoume Minko,
Ignace D. Mendoume Minko
Ifremer - Centre de Brest, Plouzane´, France
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Marc Prevosto,
Marc Prevosto
Ifremer - Centre de Brest, Plouzane´, France
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Gilbert Damy
Gilbert Damy
Ifremer - Centre de Brest, Plouzane´, France
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Ignace D. Mendoume Minko
Ifremer - Centre de Brest, Plouzane´, France
Marc Prevosto
Ifremer - Centre de Brest, Plouzane´, France
Gilbert Damy
Ifremer - Centre de Brest, Plouzane´, France
Paper No:
OMAE2008-57933, pp. 953-960; 8 pages
Published Online:
July 27, 2009
Citation
Mendoume Minko, ID, Prevosto, M, & Damy, G. "Statistical Modelling of Current Profiles for a Riser Reliability Design." Proceedings of the ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. Volume 4: Ocean Engineering; Offshore Renewable Energy. Estoril, Portugal. June 15–20, 2008. pp. 953-960. ASME. https://doi.org/10.1115/OMAE2008-57933
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