A risk-based evaluation ice-strengthened hull structures

Pentti Kujala, Sören Ehlers

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    Abstract

    Current ice class rules may design a structure that can undergo some plastic deformations during their design life. The amount of allowable plastic deformations is however not clearly defined in these ice class rules so as the critical deformation limit that requires repair. It is possible to increase the scantlings until no plastic deformations occur during the ship's lifetime. This will cause a high investment cost at the construction phase but no repair cost during the design life. Another possibility is to allow some local plasticity requiring repair work at specified nominal frequencies during the ships' lifetime, which causes smaller investments, but higher maintenance costs. The optimum between these two extremes is searched in this paper and the procedure on how to identify such concept will be described.

    Original languageEnglish
    Title of host publicationTransactions
    Subtitle of host publicationsociety of naval architects and marine engineers
    PublisherSOCIETY OF NAVAL ARCHITECTS AND MARINE ENGINEERS
    Pages499-504
    Number of pages6
    Volume122
    ISBN (Electronic)9780939773176
    Publication statusPublished - 2014
    MoE publication typeA4 Article in a conference publication
    EventTransactions: Society of Naval Architects and Marine Engineers: Annual Meeting and Expo and Ship Production Symposium - Houston, United States
    Duration: 22 Oct 201424 Oct 2014

    Publication series

    NameTransactions: society of naval architects and marine engineers
    PublisherSociety of Naval Architects and Marine Engineers
    Volume122
    ISSN (Electronic)0081-1661

    Conference

    ConferenceTransactions: Society of Naval Architects and Marine Engineers
    Abbreviated titleSNAME
    CountryUnited States
    CityHouston
    Period22/10/201424/10/2014

    Keywords

    • Economic design
    • Ice loads
    • Ice strengthening
    • Limit states
    • Ships

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