Extrapolation of model tests measurements of whipping to identify the dimensioning sea states for container ships

Gaute Storhaug, Ingrid Marie Vincent Andersen

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    Abstract

    Whipping can contribute to increased fatigue and extreme loading of container ships, and guidelines have been made available by the leading class societies. Reports concerning the hogging collapse of MSC Napoli and MOL Comfort suggest that whipping contributed. The accidents happened in moderate to small storms. Model tests of three container ships have been carried out in different sea states under realistic assumptions. Preliminary extrapolation of the measured data suggested that moderate storms are dimensioning when whipping is included due to higher maximum speed in moderate storms. This paper considers various extrapolation methods to investigate the uncertainty in the extrapolation methods and to see if all methods confirm that the moderate storms are dimensioning.
    Original languageEnglish
    JournalProceedings of the International Offshore and Polar Engineering Conference
    Volume3
    Pages (from-to)114-122
    ISSN1098-6189
    Publication statusPublished - 2015
    Event25th International Ocean and Polar Engineering Conference - Kona, United States
    Duration: 21 Jun 201526 Jun 2015
    http://www.isope.org/conferences/conferences.htm

    Conference

    Conference25th International Ocean and Polar Engineering Conference
    Country/TerritoryUnited States
    CityKona
    Period21/06/201526/06/2015
    Internet address

    Keywords

    • Container ships
    • Extrapolation
    • Extreme Value Prediction
    • Hydro-elasticity
    • Model tests
    • Wave induced vibrations
    • Whipping

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