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Home Archive of journals Issue 4(36) 2019 Methodological basis for determining the design ice loads on the hull of modern ice vessels in the bow and stern areas

METHODOLOGICAL BASIS FOR DETERMINING THE DESIGN ICE LOADS ON THE HULL OF MODERN ICE VESSELS IN THE BOW AND STERN AREAS

JOURNAL: 2019, 4(36), p. 83-98

RUBRIC: Shipbuilding for the Arctic

AUTHORS: Platonov V.V., Tryaskin V.N.

ORGANIZATIONS: Krylov State Research Centre, State Marine Technical University

DOI: 10.25283/2223-4594-2019-4-83-98

UDC: 629.5.011:624.042.43

The article was received on: 11.04.2019

Keywords: ice loads, Double-acting vessels, Russian Maritime Registry of Shipping, Rules of the Russian Maritime Registry of Shipping

Bibliographic description: Platonov V.V., Tryaskin V.N. Methodological basis for determining the design ice loads on the hull of modern ice vessels in the bow and stern areas. Arctic: ecology and economy, 2019, no. 4(36), pp. 83-98. DOI: 10.25283/2223-4594-2019-4-83-98. (In Russian).


ANNOTATION:

The hull structure of modern ice vessels has changed significantly compared with the vessels typical at the time of development of the current RMRS Rules. The use of existing approximations for the structure functions as applied to the modern structures of the DAS (double action ships) extremities quite often leads to large discrepancies with direct calculations by the method or by analytical dependencies. Particularly sensitive to the applied formulas are the areas of transition of the bow/stern ends to the cylindrical insert for vessels with vertical sides in the middle part, as well as the very bow/stern sections of the bow/stern areas, where the slopes of the frames and waterlines are maximal.
Upon the analysis of the hull structure features in the bow and stern areas of modern ice vessels including the DAS ones, an original method for constructing dependencies is proposed to determine the parameters of ice loads on the extremities of the vessels having an ice category of the Russian Maritime Register of Shipping. On the basis of the developed methodology, recommendations are made for determining design ice loads on bow and stern areas of double-acting ships further incorporated in the draft requirements of the RMRS Rules for the design of ice hull reinforcement for vessels intended to be operated astern.


Reference:

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DOI 10.25283/2223-4594