Drillship global strength analysis under oblique equivalent design waves

  • Leonard Domnișoru “Dunarea de Jos” University of Galati
Keywords: drillship, equivalent design wave, oblique waves, initial strength assessment.

Abstract

For the design of off-shore drillships, one of the criteria for initial strength assessment is based on global strength analysis under oblique equivalent design waves (EDW). The global strength procedure is based on an iterative approach, taking into account the ship hull external shape non-linearities, for a set of heading angles and design wave heights according to shipbuilding classification societies rules. This study analyzes the global strength of a drillship having 210 m length, for two relevant displacement cases. The numerical analysis is done by own code, delivering the ship-wave relative position and the generated wave loads. The results are compared to the limit values from several shipbuilding rules and the initial drillship strength is evaluated.

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References

[1]. ABS, Rules, American Bureau of Shipping, TX, 2013.
[2]. Bidoae, I., “Ship theory. Ship statics”, University Publishing House, Galati, 1985.
[3]. Bidoae, R., Ionas, O.,"Ship theory. Statics", E.D.P. Publishing House, Bucharest, 2004.
[4]. Biran A. B., "Ship hydrostatics and stability", Elsevier Publishing House, 2003.
[5]. BV, Rules, Bureau Veritas, Paris, 2013.
[6]. Domnisoru, L.,Rubanenco, I., Domnisoru, D., "On the linear and non-linear dynamic hydroelastic response analysis of an off-shore drillship elastic structure", The Annals of “Dunarea de Jos” University of Galati, Fascicle XI Shipbuilding, pp. 5-14, 2013.
[7]. Domnisoru, L., " Numerical approach for global ship strengths analysis based on 1Dbeam model, under oblique equivalent quasistatic wave loads", The Annals of “Dunarea de Jos” University of Galati, Fascicle XI Shipbuilding, pp. 27-36, 2015.
[8]. Domnisoru, L., "On the seakeeping response analysis of a large off-shore drillship", The Annals of “Dunarea de Jos” University of Galati, Fascicle XI Shipbuilding, pp. 51-60, 2016.
[9]. DNV,Rules,Det Norske Veritas,Novik,2013.
[10]. Fricke W, Bronsar R. (editors), "Proceeding of the 18th International Ship and Offshore Structures Congress-ISSC", Schiffbautechnischen Gesellschaft, Hamburg, 2014.
[11]. GL, Rules, Germanischer Lloyd’s, Hamburg, 2013.
[12]. Ionas O., Domnisoru L., Gavrilescu I., Dragomir D., "Computing techniques in shipbuilding", Evrika Publishing House, Braila, 1999.
[13]. Rawson K.J., Tupper E.C., "Basic ship theory", (2 vol.) Butterworth Heinemann, Oxford, 2001.
[14]. Tetsuya Yao, "Hull girder strength", Marine Structures, 16: 1-13, 2003.
[15]. Toki N., "A study on the determination of design wave condition",Transactions West-Japan Society of Naval Architects; 89:191–208, 1995
Published
2017-12-31
How to Cite
1.
Domnișoru L. Drillship global strength analysis under oblique equivalent design waves. Annals of ”Dunarea de Jos” University of Galati. Fascicle XI Shipbuilding [Internet]. 31Dec.2017 [cited 29Mar.2024];40:21-0. Available from: https://www.gup.ugal.ro/ugaljournals/index.php/fanship/article/view/1056
Section
Articles

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