Investigation of the Hydrodynamic Performance of a Novel Semi-Submersible Platform with Multiple Small Columns
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This paper presents a novel semi-submersible (SEMI) platform concept, called the multiple small columns (MSC) SEMI that improves upon the hydrodynamic performance of the conventional SEMI. Unlike the conventional SEMI, the proposed MSC SEMI utilizes multiple small circular columns to support the deck and a large pontoon that increases the structural displacement. The novelty of the MSC SEMI is its reduction of the hydrodynamic load on the structure and suppression of its motion response, particularly in the heave direction. The MSC SEMI has the advantages of increasing the added mass, radiation damping, and natural period of the structure. A comprehensive investigation of the hydrodynamic performance of the novel MSC SEMI is conducted in both the time and frequency domains with a special focus on the resulting hydrodynamic load and motion response. Numerical simulation results demonstrate that the MSC SEMI concept can reduce the hydrodynamic load and motion response and improve the hydrodynamic performance of SEMIs as expected.
Key wordssemi-submersible platform multiple small columns hydrodynamic performance coupled dynamic analysis
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The authors acknowledge the support by the National Science Fund for Distinguished Young Scholars (No. 51625902), the National Key Research and Development Program of China (No. 2016YFE0200100), the Major Program of the National Natural Science Foundation of China (No. 51490675), and the Taishan Scholars Program of Shandong Province (No. TS201511016).
- DNV (Det Norske Veritas), 2010. WADAM–Wave analysis by diffraction and Morison theory. SESAM user’s manual. Det Norske Veritas, Hovik.Google Scholar
- DNV (Det Norske Veritas), 2014. Recommended practice DNVRP–C205–environmental conditions and environmental loads. Det Norske Veritas, Hovik.Google Scholar
- Faltinsen, O., 1993. Sea Loads on Ships and Offshore Structures. Cambridge University Press. Cambridge, 68–73.Google Scholar
- Fylling, I. J., Larsen, C. M., Sodahl, N., Ormberg, H., Engseth, A., Passano, E., and Holthe, K., 2008. RIFLEX–theory manual. SINTEF, report no. STF70F95219.Google Scholar
- Jiao, Y., 2010. Non–linear load–deflection models for seafloor interaction with steel catenary risers. Master thesis. Texas A & M University.Google Scholar
- Mansour, A. M., 2009. FHS Semi: A semisubmersible design for dry tree applications. In: ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. Honolulu, Hawaii, Paper no. OMAE2009–79303, 271–280.Google Scholar
- Murray, J. J., Yang, C. K., Chen, C. Y., and Nah, E., 2008. Two dry tree semisubmersible designs for ultra–deep water post–Katrina Gulf of Mexico. In: ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. Estoril, Paper no. OMAE 2008–57462, 433–440.CrossRefGoogle Scholar
- Ran, Z. H., 2000. Coupled dynamic analysis of floating structures in waves and currents. PhD thesis. Texas A&M University.Google Scholar
- Reinholdtesn, S. A., 2004. SIMO–simulation of marine operation theory manual. Norwgian Marine Technology Research Institution, Report no. 516412.00.03.Google Scholar
- Song, X. C., Wang, S. Q., and Zhang, Y., 2017. Hydrodynamic Performance of the Semisubmersible Platform with Multiple Small Columns. In: the 27th International Ocean and Polar Engineering Conference. San Francisco, California, Document ID: ISOPE–I–17–037, 913–919.Google Scholar
- Srinivasan, N., Sundaravadivelu, R., Selvakumar, R., and Kanotra, R., 2009. Innovative harsh environment dry–tree support semi–submersible for ultra–deepwater applications. In: ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. Honolulu, Hawaii, Paper no. OMAE 2009–80085, 803–817.CrossRefGoogle Scholar
- Tahar, A., and Finn, L., 2010. Inplace model test result correlation of multi column floater (MCF): Drilling and Production unit. In: ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. Shanghai, Paper no. OMAE 2010–20640, 433–442.Google Scholar
- Xie, B., Xie, W., and Jiang, Z., 2012. A new concept of a deep water tumbler platform. In: The 22nd International Offshore and Polar Engineering Conference. Rhodes, Document ID: ISOPE–I–12–076, 1012–1018.Google Scholar