Authors: A.S. Bolshev, M.M. Karulina
Abstract
In this article, the authors discuss the problems of analyzing and interpreting the results of scaled physical modeling of ice action on offshore structures. The article studies the processing of the results obtained during the ice model tests of offshore structures interaction with ice. One of the aims of the study has been to reveal the peculiarities of conducting experiments in the ice model basin and the complexity of the experimental data processing caused by these peculiarities. The difficulties in processing and interpreting the experimental data obtained in the ice basin are due to the inmpossibility of to accurately reproduce the natural experimental conditions for taking a series of repeated measurements, with the influence of a number of random factors converting the investigated parameters from deterministic to stochastic ones. The authors proposed a scientifically based approach for processing the ice model tests results and constructing the variability interval for the ice load acting on an offshore structure. The description and an example of practical application of the developed procedure are presented in the article.
Keywords: model tests, offshore structure, ice model basin, model ice, ice properties, ice loads, regress model, variability
References
1. Avdyushev V.A., Mezentseva A.D. Metod naimenshikh moduley i ego effektivnost pri obrabotke izmereniy s oshibkami razlichnogo raspredeleniya [Minimal modules method and its efficiency during measurement processing with mistakes of various distribution]. Izvestiya vysshikh uchebnykh zavedeniy [Proceedings of higher educational establishments]. 2012, vol. 55, № 10/2, pp. 68-76.
2. Blagovidova I.L., Karulina M.M., Karulin E.B. Opyt masshtabnogo fizicheskogo modelirovaniya ledovogo vozdeystviya na opornoye osnovaniye SMLOP "Varandey" [Experiment of scale physical modeling of ice impact on the mount fixed mooring "Varandey"]. Trudy mezhdunarodnoy konferentsii Offshore Marintec Russia [Proc. of international conference Offshore Marintec Russia]. St. Petersburg, 2016.
3. GOST R 8.736-2011. Izmereniya pryamyye mnogokratnyye. Metody obrabotki rezultatov izmereniy [State Standard R 8.736-2011. Multiple direct measurements. Methods of measurement results processing]. Moscow, Standartinform Publ, 2013.
4. Mudrov V.I., Kushko V.L. Metod naimenshikh moduley [Method of minimal modules]. Moscow, Znaniye Publ., 1971, 64 p.
5. Mukha V.S. Statisticheskiye metody obrabotki dannykh [Statistical method of data processing]. Minsk, 2007, 38 p.
6. Pravila klassifikatsii, postroyki i oborudovaniya PBU/MSP [Rules for the Classification, Construction and Equipment of Mobile Offshore Drilling Units and Fixed Offshore Platforms]. Russian Maritime Register of Shipping, 2014.
7. SP 38.13330.2012. Nagruzki i vozdeystviya na gidrotekhnicheskiye sooruzheniya (volnovyye. ledovyye i ot sudov). Aktualizirovannaya redaktsiya SNiP 2.06.04-82* [SP 38.13330.2012. Loads and impact on hydraulic structure (wave loads, ice loads and loads from vessels). Actual revision SNiP 2.06.04-82*]. Moscow, Minregion Rossii, 2014.
8. Khyuber P. Robastnost v statistike [Robustness in static]. Moscow, Mir Publ., 1984, 304 p.
9. Alexeev Yu., Karulin E., Karulina M., Sutulo S. A method for predicting ice loads on structures based on model test data. Proc. of 14 Ice Symposium IAHR, Potsdam, New York, v.1, pp. 497-502, 1998.
10. Matskevitch D. Velocity effects on conical structure ice loads. Proc. of 21st Int. Conference on Offshore Mechanics and Arctic Engineering.
11. Paper OMAE 2002-28079, Oslo, Norway, 2002.
12. Ralston T. Ice Force Design Considerations for Conical Offshore Structures. POAC'77, vol. 2, pp.741 - 752, 1977.
About authors
A.S. Bolshev - DSc, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, tel.: +7 (812) 297-59-54, e-mail: alexanderbolshev@rambler.ru
M.M. Karulina - PhD, Krylov State Research Centre, St. Petersburg, tel.: +7 (812) 415-46-17, e-mail: marina@ek17106.spb.edu
For citation: A.S. Bolshev, M.M. Karulina. Assessment of ice load variability interval based on the model tests results. Research Bulletin by Russian Maritime Register of Shipping. 2018, No. 52/53, pp. 97-105.
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UDC: 629.514: 629.563
Pages: 97-105
Fr: 8:30 – 16:15 (msk)