Offshore HVL sea-transport safety by direct strength and fatigue assessment

Timo Mikkola, Timo Kukkanen, Ilari Silvola, JyriPekka Arjava, Jouni Peltomaa

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

    Abstract

    Several SPAR hull structures for deep water oil production have been manufactured in Pori, Finland and transported to the Gulf of Mexico with heavy lift vessels (HLV). A complete spectral based structural analysis procedure has been developed for guaranteeing structural integrity during the sea-transports. The procedure utilises 31) hydrodynamic and structural model results for strength and buckling analyses against extreme sea state conditions and fatigue analysis for voyage duration wave loads. In addition, slamming loads are studied on overhanging structures. The completed analyses have resulted in improvements and optimisation of both the fatigue strength and buckling capacity of the spar and support structure details. A more even support load transfer between ship deck and cargo has been reached. The slamming analysis procedure has yielded to reasonable heading dependent sea state restrictions despite of its apparently large inherent conservatism.
    Original languageEnglish
    Title of host publicationProceedings of the 20th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2001
    PublisherAmerican Society of Mechanical Engineers ASME
    Pages341-346
    Volume2: Safety and Reliability
    ISBN (Print)0-7918-3535-9
    Publication statusPublished - 2001
    MoE publication typeB3 Non-refereed article in conference proceedings
    Event20th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2001 - Rio de Janeiro, Brazil
    Duration: 3 Jun 20018 Jun 2001

    Conference

    Conference20th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2001
    CountryBrazil
    CityRio de Janeiro
    Period3/06/018/06/01

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  • Cite this

    Mikkola, T., Kukkanen, T., Silvola, I., Arjava, J., & Peltomaa, J. (2001). Offshore HVL sea-transport safety by direct strength and fatigue assessment. In Proceedings of the 20th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2001 (Vol. 2: Safety and Reliability, pp. 341-346). American Society of Mechanical Engineers ASME.