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- W2294458694 abstract "An isogeometric framework is presented for parametrizing a wind turbine rotor blade and analysing its response.The framework consists of multi-fidelity approach for wind turbine rotor analysis. The aeroelastic loads are determinedusing a low-fidelity model. This low-fidelity model is based on isogeometric approach to model both the structural andaerodynamic properties, because of its suitability for shape and size optimization. The structural properties are determinedusing a geometrically exact beam model and a standard Blade Element Momentum(BEM) method is used to calculate theaerodynamic loads. In addition, the aerodynamic loads calculated using BEM theory are modified to account for changein the blade shape during shape optimization or for very flexible blade undergoing large deformation. The cross-sectionalproperties of the blade, needed for the beam model, are determined using an in-house tool that generates the cross-sectionalstiffness properties with all possible couplings for thin-walled, multi-cell, open or closed cross-sections with anisotropicproperties. The aeroelastic loads are applied in finite element analysis (Nastran) as static loads to a shell model of the blade;and both the stress response and buckling response are extracted. In addition, sensitivity coefficients of the aeroelasticresponses to the design variables are calculated, such that this framework can also be used to optimize the rotor blade.Furthermore, the capabilities of Nastran are extended such that design dependent loads can be applied, resulting in correctaeroelastic sensitivities of Nastran responses. The framework is verified against results from the commercial codes FAST and GH Bladed, using the NREL 61.5 m rotor blade as a baseline for comparison,showing good agreement. Finally, the capability of the present method in designing and analysing non-conventional blades is demonstrated by investigating theaeroelastic characteristics of the curved Sandia 30m, STAR blade." @default.
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- W2294458694 date "2015-07-01" @default.
- W2294458694 modified "2023-09-27" @default.
- W2294458694 title "Isogeometric framework for aeroelastic wind turbine rotor analysis" @default.
- W2294458694 hasPublicationYear "2015" @default.
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