Comparison of Mooring Loads in Survivability Mode on the Wave Dragon Wave Energy Converter Obtained by a Numerical Model and Experimental Data

Stefano Parmeggiani, Made Jaya Muliawan, Zhen Gao, Torgeir Moan, Erik Friis-Madsen

    Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

    3 Citations (Scopus)

    Abstract

    The Wave Dragon Wave Energy Converter is ready to be up-scaled to commercial size. The design and feasibility analysis of a 1.5 MW pre-commercial unit to be deployed at the DanWEC test center in Hanstholm, Denmark, is currently ongoing. With regard to the mooring system, the design has to be carried out numerically, through coupled analyses of alternative solutions. The present study deals with the preliminary hydrodynamic characterization of Wave Dragon needed in order to calibrate the numerical model to be used for the mooring design. A hydrodynamic analysis of the small scale model in the frequency domain is performed by the software HydroD, which uses WAMIT as core software. The quadratic damping term, accounting for the viscous effect, is determined through an iterative procedure aimed at matching numerical predictions on the mooring tension, derived through time domain coupled analysis, with experimental results derived from tank tests of a small scale model. Due to the complex geometry of the device, a sensitivity analysis is performed to discuss the influence of the mean position on the quality of the numerical predictions. Good correspondence is achieved between the experimental and numerical model. The numerical model is hence considered reliable for future design applications.
    Original languageEnglish
    Title of host publicationProceedings of the ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering : OMAE2012
    Number of pages10
    Place of PublicationRio de Janeiro
    PublisherAmerican Society of Mechanical Engineers
    Publication date2012
    Publication statusPublished - 2012
    Event31st International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2012) - , Brazil
    Duration: 1 Jul 20126 Jul 2012

    Conference

    Conference31st International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2012)
    CountryBrazil
    Period01/07/201206/07/2012

    Bibliographical note

    The conference proceedings is published on a DVD

    Keywords

    • Wave Dragon
    • Wave Energy Converter
    • Up-scalling
    • 1.5 MW
    • DanWEC test center
    • Numerical Model

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    Parmeggiani, S., Muliawan, M. J., Gao, Z., Moan, T., & Friis-Madsen, E. (2012). Comparison of Mooring Loads in Survivability Mode on the Wave Dragon Wave Energy Converter Obtained by a Numerical Model and Experimental Data. In Proceedings of the ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering: OMAE2012 American Society of Mechanical Engineers.