Geometric nonlinear dynamic response of wind turbines with different power performance

As the size of wind turbine blades increases, influence geometric nonlinearity on aerodynamic, structural and design becomes more serious. In this work, efficient aero-elastic calculation large flexible is studied. order to solve problem aeroelastic caculation blades, work applied geometrically exact beam theory based Legendre spectral finite element coupled with blade momentum establish analysis model blades. This can efficiently calculate deformation load under aerodynamic loading fully consider caused by ability. Taking NREL 5MW IEA 15MW turbines as examples, linear nonlinear dynamic responses these two are calculated. The result shows that neglect effect will bring error. From turbine, numerical error increased 27.88%. analysed, which great significance improve level large-scale turbines.