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Experimental and computational damping estimation of an offshore wind turbine on a monopile foundation
Shirzadeh, R.; Devriendt, C.; Bidakhvidi, M.A.; Guillaume, P. (2013). Experimental and computational damping estimation of an offshore wind turbine on a monopile foundation. J. Wind. Eng. Ind. Aerodyn. 120: 96-106. http://dx.doi.org/10.1016/j.jweia.2013.07.004
In: Journal of Wind Engineering and Industrial Aerodynamics. Elsevier Science: Amsterdam. ISSN 0167-6105; e-ISSN 1872-8197, more
Peer reviewed article  
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Keyword
    Marine/Coastal
Author keywords
    Offshore wind turbine; Offshore measurement; Damping; Overspeed stop; Ambient excitation
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Abstract
    In this study, Operational Modal Analysis (OMA) is used to identify the damping value of the fundamental for-aft (FA) mode of an Offshore Wind Turbine (OWT) using both real life measurements and simulations. Estimations of the total damping of an offshore wind turbine (taking into account the effects of the aerodynamic, hydrodynamic and soil loads) give a quantitative view of the stability characteristics of the wind turbine. Two different test cases including an overspeed stop and ambient excitation have been considered. The experimental data has been obtained during a measurement campaign on an offshore wind turbine in the Belgian North Sea and the results are compared with the numerical simulations which have been carried out in HAWC2.
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