This paper concerns the numerical description of nonlinear waves propagating over the storage caissons of a gravity based structure. This process produces a steepening of the incident wave-field, which occurs when the waves propagate into the shallower water region above the storage caissons, resulting in the focussing of wave energy. A fully nonlinear Multiple-flux Boundary Element Method (MF-BEM) is applied to simulate this effect. The MF-BEM differs from traditional boundary integral approaches in two important respects: first, a multiple-flux approach is employed to overcome the problem of geometric discontinuities; and, second, no filtering, smoothing, re-gridding or redistribution of the nodes is performed at any stage during the simulations. These two aspects are believed to play an important role in accurately predicting the steepening of the incident wave-field. The numerical predictions are compared to new laboratory observations that examine the extent of this wave-structure interaction and, particularly, the steepening of the incident wave-field.
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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
The Interaction of Nonlinear Waves With the Submerged Caissons of a Gravity Based Structure
Marios Christou,
Marios Christou
Shell International Exploration and Production B.V., Rijswijk, The Netherlands
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Jannicke S. Roos,
Jannicke S. Roos
Imperial College London, London, UK
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Chris Swan,
Chris Swan
Imperial College London, London, UK
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Ove T. Gudmestad
Ove T. Gudmestad
StatoilHydro; University of Stavanger, Stavanger, Norway
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Marios Christou
Shell International Exploration and Production B.V., Rijswijk, The Netherlands
Jannicke S. Roos
Imperial College London, London, UK
Chris Swan
Imperial College London, London, UK
Ove T. Gudmestad
StatoilHydro; University of Stavanger, Stavanger, Norway
Paper No:
OMAE2008-57532, pp. 361-370; 10 pages
Published Online:
July 27, 2009
Citation
Christou, M, Roos, JS, Swan, C, & Gudmestad, OT. "The Interaction of Nonlinear Waves With the Submerged Caissons of a Gravity Based Structure." 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. 361-370. ASME. https://doi.org/10.1115/OMAE2008-57532
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