Model tests are widely thought as a reliable means of obtaining answers to questions beyond the realm of state-of-the art simulation tools. The author’s experience, no doubt shared with others, has been that whilst providing many answers model tests sometimes raise new questions and unveil phenomena not anticipated at the start. Sometimes these phenomena are investigated in detail and documented (ref [1]), but more often the pressure of project execution prevents enough time to be spent in understanding these phenomena if they are thought to be of secondary importance. This paper will address two such instances of un-resolved and un-explained experimental results. The first instance is drawn from a 2004 model test campaign where an LNG carrier was kept on station by a horizontal mooring in 30m water depth. Un-explained 1st order motion responses were obtained in bow-quartering waves. The second instance is drawn from model tests performed in the context of the HAWAI-JIP in 2006. Un-explained low-frequency sway motions of an LNG carrier were observed during a surge decay tests in shallow water waves. The paper will describe these findings and propose rational explanations.
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ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
June 19–24, 2011
Rotterdam, The Netherlands
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4435-9
PROCEEDINGS PAPER
Unresolved Enigmas From Shallow Water Model Tests Available to Purchase
Mamoun Naciri,
Mamoun Naciri
Single Buoy Moorings Inc., Monaco
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Radboud van Dijk,
Radboud van Dijk
Heerema Marine Contractors, Leiden, The Netherlands
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Olaf Waals
Olaf Waals
MARIN, Wageningen, The Netherlands
Search for other works by this author on:
Mamoun Naciri
Single Buoy Moorings Inc., Monaco
Radboud van Dijk
Heerema Marine Contractors, Leiden, The Netherlands
Olaf Waals
MARIN, Wageningen, The Netherlands
Paper No:
OMAE2011-50122, pp. 793-802; 10 pages
Published Online:
October 31, 2011
Citation
Naciri, M, van Dijk, R, & Waals, O. "Unresolved Enigmas From Shallow Water Model Tests." Proceedings of the ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. Volume 3: Materials Technology; Jan Vugts Symposium on Design Methodology of Offshore Structures; Jo Pinkster Symposium on Second Order Wave Drift Forces on Floating Structures; Johan Wichers Symposium on Mooring of Floating Structures in Waves. Rotterdam, The Netherlands. June 19–24, 2011. pp. 793-802. ASME. https://doi.org/10.1115/OMAE2011-50122
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