Abstract
For offshore structures like semi submersibles and jack-ups, hydrostatic stability is to be determined for what is called the weakest axis, which is not necessarily the same as the longitudinal axis of symmetry of the structure. When allowing trim to take place, the determination of the critical axis is complicated as free trimming leads to multiple solutions regarding the position for a given heel angle. It will be shown that for a freely floating structure, looking at the increase in potential energy can be used to identify those axis directions which are critical as well as realistic. The theoretical results will be illustrated with detailed data obtained for a two typical offshore structures using a standard stability program.
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References
ABS rules for building and classing Mobile Offshore Drilling Units 2008.
Breuer JA and Sjölund KG (2006) “Orthogonal Tipping in Conventional Offshore Stability Evaluations”, Proc of the 9 th Int conf on Stab of Ships and Ocean Veh (STAB 2006), Rio de Janeiro.
Santen JA (1986) “Stability calculations for jack-ups and semi-submersibles”, Conf on computer Aided. Design, Manuf and Oper in the Mar and Offshore Ind CADMO 1986, Washington.
Santen JA (1999) “Jack-up model tests for dynamic effects on intact and damaged stability”, Seventh Int Conf The Jack-up Platform: Design, Constr and Oper, City Univ, London, Sept.
Santen JA (2009) The use of energy build up to identify the most critical heeling axis direction for stability calculations for floating offshore structures, review of various methods. 12th Jack-Up Conf 2009 City Univ, London.
Witz JA, Patel MH (July, 1985) “A pressure integration technique for hydrostatic analysis”, RINA suppl pap, Vol. 127.
Couser P (2003) “A Software Developer’s Perspective of Stability Criteria”, 8th Int Conf on the Stab of Ships and Ocean Veh, STAB 2003, Madrid.
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van Santen, J. (2011). The Use of Energy Build Up to Identify the Most Critical Heeling Axis Direction for Stability Calculations for Floating Offshore Structures. In: Almeida Santos Neves, M., Belenky, V., de Kat, J., Spyrou, K., Umeda, N. (eds) Contemporary Ideas on Ship Stability and Capsizing in Waves. Fluid Mechanics and Its Applications, vol 97. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-1482-3_10
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DOI: https://doi.org/10.1007/978-94-007-1482-3_10
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