Analysis of the fatigue strength of the anchor mooring system of floating single-point moorings by methods of full-probability mathematical modeling
Abstract
The article deals with the methodology for the performance of fatigue analysis of Floating Single-Point Moorings (FSPM), using full-probability mathematical simulation methods. Under consideration are problems of developing a full-probability mathematical simulation scheme using data on wind/wave conditions in seas surrounding the Russian Federation available in Handbooks issued by the Register of Shipping (RS). Approaches to mathematical simulation of the behavior of the mechanical system "tanker/buoy/submarine hoses with an auxiliary buoyancy tank — the anchor mooring system" in all steady modes covered by the full-probability scheme, are described. A general methodology is presented for fatigue analysis of anchor legs, based on the numerical simulation of the behavior of FSPM in various operating modes, as exposed to different combinations of irregular environmental actions typical for long-term periods associated with the life cycle of FSPM. Some data on the practical application of the proposed methodology are given.
About the Authors
V. V. NoskovRussian Federation
Chief Design Engineer
299045 Sevastopol, ul. Repina, 1
N. N. Gorban
Russian Federation
PhD
115093 Moscow, Pavlovskaya ul., 7
A. S. Bolshev
Russian Federation
DSc, Professor
195251 St. Petersburg, Politekhnicheskaya ul., 29Б
S. A. Frolov
Russian Federation
PhD, Associate Professor
195251 St. Petersburg, Politekhnicheskaya ul., 29Б
References
1. Rules for the Classification, Construction and Equipment of Mobile Offshore Drilling Units (MODU) and Fixed Offshore Platforms of (FOP) / Russian Maritime Register of Shipping. St. Petersburg, 2023. 510 p.
2. GOST R 58773—2019 — Sooruzheniya neftegazopromyslovye morskie. Sistemy pozitsionirovaniya plavuchikh sooruzhenii (ISO 19901-7:2013, Petroleum and natural gas industries — Specific requirements for offshore structures — Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units, MOD). Moscow: Standartinform, 2020. 151 p.
3. Bolshev A.S., Frolov S.A., Kuteynikov M.A. Mathematical modeling of floating facilities behaviour by means of the software package "Anchored Structures". Transactions of Russian Maritime Register of Shipping. 2013. Issue 36. P. 68 — 90. (In Russ.)
4. Garrison C.J., Chow P.Y. Wave forces on submerged bodies. Journal of the Waterways, Harbors and Coastal Engineering Division. 1972. Vol. 98, No. WW3. P. 375 — 392. (American Society of Civil Engineers, New York, USA.)
5. Sergeev A.D. Dinamika diskretno-kontinual'nykh mekhanicheskikh sistem: diss. dokt. fiz.-mat. nauk [Dynamics of discrete-continuum mechanical systems: Dr. phys. and math. sci. thesis]. St. Petersburg: Institut problem mashinovedeniya RAN, 2006. 328 p.
6. Reference Data on Wind and Wave Regime of the Baltic, North, Black, Azov and Mediterranean Seas / Russian Maritime Register of Shipping. St. Petersburg, 2006. 450 p.
7. Grigor'eva O.A. Inzhenernye metody ocenki prochnosti i dolgovechnosti yakornyh svyazej i rajzerov shel'fovyh sooruzhenij: diss. kand. tekh. nauk [Engineering methods for assessing the strength and durability of anchor ties and risers of offshore structures: PhD thesis]. St. Petersburg, 2009. 178 p.
Review
For citations:
Noskov V.V., Gorban N.N., Bolshev A.S., Frolov S.A. Analysis of the fatigue strength of the anchor mooring system of floating single-point moorings by methods of full-probability mathematical modeling. Research Bulletin by Russian Maritime Register of Shipping. 2024;(77):41-50. (In Russ.)