Validation of Superelement Modelling of Complex Offshore Support Structures

Shaofeng Wang, Torben J. Larsen, Anders Melchior Hansen

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    Modern large MW wind turbines today are installed at larger water depth than applicable for traditional monopile substructure. It appears that foundation types such as jacket and tripod are gaining more popularity for these locations. For certification purposes, a full set of design load calculations consisting of up to thousands design load cases needs to be evaluated. However, even the simplest aero-elastic model of such structures has many more DOFs than monopile, resulting in excessive computation burden. In order to deal with this problem, the superelement method has been introduced for modelling such structures. One superelement method has been proven very promising in the previous project of Wave Loads [1] and a fundamental question in such DOFs reduction methods is which modes that are essential and which modes can be neglected. For the jacket structure, the introduction of a gravity-buoyancy mode (GB mode) demonstrates that this mode is needed for accurate load simulation. A case study is performed in this report to validate the proposed method based on a reference wind turbine on a jacket foundation.
    Original languageEnglish
    Title of host publicationProceedings of 12th EAWE PhD Seminar on Wind Energy in Europe
    Number of pages4
    PublisherEuropean Academy of Wind Energy
    Publication date2016
    Publication statusPublished - 2016
    Event12th EAWE PhD Seminar - DTU, Lyngby, Denmark
    Duration: 25 May 201627 May 2016
    Conference number: 12


    Seminar12th EAWE PhD Seminar


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