TRANSACTIONS OF THE KRYLOV STATE RESEARCH CENTRE

Science journal

 
ISSN (print) 2542-2324 /(online) 2618-8244


Articles of The Transactions of KSRC








Improvement of RMRS ice strengthening requirements for ice class vessels and icebreakers



Full text article ( in russian)

Year

 
2018

Issue

 
385

Volume

 
3

Pages

 
18-28

Caption

 
Improvement of RMRS ice strengthening requirements for ice class vessels and icebreakers

Authors

 
Appolonov E.M., Platonov V.V., Tryaskin V.N

Keywords

 
Russian Maritime Register of Shipping, Rules, ice loads, hydrodynamic model, dynamic ice failure model.

DOI

 
10.24937/2542-2324-2018-3-385-18-28

Summary

 
Object and purpose of research.The object of this background research and design analysis are the ice strengthening requirements of the Russian Register Rules for ice class vessels and icebreakers
Subject matter and methodsDesign ice loads are determined using a dynamic model of ice failure, which describes a complicated process of simultaneous ice crushing and dynamic ice displacement. This model is in agreement with up-to-date experimental data on ice failure mechanism under local crushing effect.
Main results.Proposals were developed to improve the ice-strengthening requirements of current RMRS Rules for ice class vessels and icebreakers, in particular regulation of design ice loads, to ensure well-grounded extrapolation of previously gained expertise in structural strength of ice-going vessel to cover prospective large-size ice-class vessels and powerful icebreakers.
Conclusion.The hydrodynamic model of ice load estimation is substituted by the progressive dynamic ice-failure model to provide adequate description of up-to-date experimental data on specific ice failure features. This new model is used to generate a new system of regulatory equations for determination of design ice loads. Due to implementation of these new proposals the design ice loads are expected to be reduced, while the overall ice strength requirements are maintained at the same level, with savings in the metal consumption required to ensure the ice strengthening of economically attractive largesize carriers and new type icebreakers.

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ISSN (print) 2542-2324 / ISSN (online) 2618-8244

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