Wave-induced Hydroelastic response of fast monohull ships

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    Abstract

    High-speed ships are weight sensitive structures and high strength steel, aluminium or composites are preferred building materials. it is characteristic for these materials that they result in larger hull flexibility than more conventional materials. Therefore, for large fast ships the lowest natural frequencies of the global hull modes can be relatively low compared to the frequency of wave encounter. In the present paper the effect of hull flexibility on the wave-induced springing vibrations is investigated in stationary stochastic seaways. The calculations are performed within the framework of a quadratic strip theory formulated in the frequency domain. The springing response is thereby excited partly be resonance and partly by non-linear excitation. Special emphasis is given to the influence of springing on fatigue damage as the extreme responses even for very flexible ships are quite insensitive to the hull flexibility due to the high zero crossing periods associated with the extreme responses.
    Original languageEnglish
    Title of host publicationProceedings of CETENA Seminar on Hydroelasticity for Ship Structural Design
    Number of pages19
    Place of PublicationGenova
    PublisherCETENA
    Publication date1996
    Publication statusPublished - 1996
    EventCETENA Seminar on Hydroelasticity for Ship Structural Design - Geneva
    Duration: 1 Jan 1996 → …

    Conference

    ConferenceCETENA Seminar on Hydroelasticity for Ship Structural Design
    CityGeneva
    Period01/01/1996 → …

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