Author(s): Oleg N. Bezzubik; Alexander V. Bitsulya; Eugene B. Karulin; Marina M. Karulina; Nataliya Y. Klementyeva; Kirill E. Sazonov; Vladimir A. Chernetsov; Alexander V. Kulakov; Viacheslav V. Kupreev

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Abstract: The paper presents results of experimental research on level and ridged ice interactions of two moored floating platforms tested at the Krylov Ice Model Tank. The platforms were designed for the Shtokmanovskoye deepwater gas condensate field. Both platforms cut the ice by downward breaking with their tapered sections whereas principal differences between the designs were in cone waterline diameters, underwater shapes and in the mooring systems. The tests were conducted both under inverted-motion conditions (Phase I) when rigidly fixed model were towed through the ice and under directmotion conditions (Phase II) when the ice was pushed against models fixed with taut lines. The obtained results included global ice loads for both design options, kinematic and dynamic responses of the platform to loads inflicted by different ice features and the associated forces in mooring lines. The exercise was the first ever opportunity to compare model platform global ice loads as measured under inverted-motion conditions with indirect measurements of mooring-line forces under direct-motion conditions. The authors review differences in the ice behaviour of the two platform design options.

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Year: 2004