Aeroelastic stability analysis of wind turbines using an eigenvalue approach

M.H. Hansen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    A design tool for performing aeroelastic stability analysis of wind turbines is presented in this paper. The method behind this tool is described in a general form, as independent of the particular aeroelastic modelling as possible. Here, the structure is modelled by a Finite beam Element Method, and the aerodynamic loads are modelled by the Blade Element Momentum method coupled with a Beddoes-Leishman type dynamic stall model in a state-space formulation. The linearization of the equations of motion is performed about a steady-state equilibrium, where the deterministic forcing of the turbine is neglected. To eliminate the periodic coefficients and avoid using the Floquet Theory, the multi-blade transformation is utilized. From the corresponding eigenvalue problem, the eigenvalues and eigenvectors can be computed at any operation condition to give the aeroelastic modal properties: Natural frequencies, damping and mode shapes. An example shows a good agreement between predicted and measured aeroelastic damping of a stall-regulated 600 kW turbine. Copyright (C) 2004 John Wiley Sons, Ltd.
    Original languageEnglish
    JournalWind Energy
    Volume7
    Issue number2
    Pages (from-to)133-143
    ISSN1095-4244
    DOIs
    Publication statusPublished - 2004
    Event2003 European Wind Energy Conference and Exhibition - Madrid, Spain
    Duration: 16 Jun 200319 Jun 2003

    Workshop

    Workshop2003 European Wind Energy Conference and Exhibition
    CountrySpain
    CityMadrid
    Period16/06/200319/06/2003

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