A finite element model of a riser protected from ice impacts by an armour is described. The riser is connected to a tanker via a turret arrangement. A steep-wave configuration at the 300-m water depth is then considered. Numerical simulations are performed to study the influence of the armour on the response of the riser, and to monitor forces and deformations in the riser. Responses are computed to different sea-states, to surge motions of the surface vessel due to drifting ice, and to impacts of ice blocks on the riser armour The simulation results confirm the workability of the concepts, and the integrity of the riser is preserved. Forces predicted from simulations on the armour top during ice impacts are of the same magnitude (close to 500 kN) as forces generated during 100-year storms.


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    Title :

    Response of an armoured riser to wave and ice actions and to impacts from ice blocks


    Additional title:

    Reaktion eines bewehrten Steigrohrs auf Seegangs- und Eiseinwirkungen und auf Stöße von Eisblöcken


    Contributors:


    Publication date :

    2005


    Size :

    10 Seiten, 28 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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