The increasing numbers of reported rogue waves with extreme crest and wave heights and unusual group pattern with the consequence of severe damages raise the question if such exceptional events have to be considered routinely for the design of ships and offshore structures. For the investigation of the effects of rogue wave impacts time domain simulation methods are required in addition to traditional frequency domain methods which may not be sufficient to consider these extreme events. In this paper the vertical bending moments at the midship section of an FPSO are investigated using state of the art numerical simulation tools in combination with experiments. For the seakeeping tests the extremely high New Year Wave (registered in the North Sea) is generated in the wave tank, and motions and structural forces are analyzed at model scale. For validation the results are evaluated deterministically and compared to numerical simulations. The time domain calculation allows to artificially change local wave characteristics. The steepness of the selected rogue wave is varied and the influence on wave induced loads is studied. A comparison with standard procedures of seakeeping analysis and classification rules closes the paper.
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ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering
June 20–25, 2004
Vancouver, British Columbia, Canada
Conference Sponsors:
- Ocean, Offshore, and Arctic Engineering Division
ISBN:
0-7918-3744-0
PROCEEDINGS PAPER
Bending Moments of an FPSO in Rogue Waves
Gu¨nther F. Clauss,
Gu¨nther F. Clauss
Technical University Berlin, Berlin, Germany
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Christian E. Schmittner,
Christian E. Schmittner
Technical University Berlin, Berlin, Germany
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Janou Hennig,
Janou Hennig
Technical University Berlin, Berlin, Germany
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Carlos Guedes Soares,
Carlos Guedes Soares
Technical University of Lisbon, Lisbon, Portugal
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Nuno Fonseca,
Nuno Fonseca
Technical University of Lisbon, Lisbon, Portugal
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Ricardo Pascoal
Ricardo Pascoal
Technical University of Lisbon, Lisbon, Portugal
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Gu¨nther F. Clauss
Technical University Berlin, Berlin, Germany
Christian E. Schmittner
Technical University Berlin, Berlin, Germany
Janou Hennig
Technical University Berlin, Berlin, Germany
Carlos Guedes Soares
Technical University of Lisbon, Lisbon, Portugal
Nuno Fonseca
Technical University of Lisbon, Lisbon, Portugal
Ricardo Pascoal
Technical University of Lisbon, Lisbon, Portugal
Paper No:
OMAE2004-51504, pp. 455-462; 8 pages
Published Online:
December 22, 2008
Citation
Clauss, GF, Schmittner, CE, Hennig, J, Guedes Soares, C, Fonseca, N, & Pascoal, R. "Bending Moments of an FPSO in Rogue Waves." Proceedings of the ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering. 23rd International Conference on Offshore Mechanics and Arctic Engineering, Volume 2. Vancouver, British Columbia, Canada. June 20–25, 2004. pp. 455-462. ASME. https://doi.org/10.1115/OMAE2004-51504
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