A STRUCTURAL-AERODYNAMIC COUPLED METHOD FOR NONLINEAR AEROELASTIC RESPONSE OF LARGE-SCALED HAWT

The nonlinear structure model of the blade was established based on the geometric precise beam theory, the unsteady flow field model of the blade was established based on the free vortex wake theory, and partition weak coupling method was used to build the nonlinear aeroelastic model of large scale wind turbine. The correctness of the results of the nonlinear structural model was verified through comparing with the calculation results of the linear model. The wind tunnel experiment data were used to verify the correctness of the free vortex wake model. The model was used for the simulation calculation of NREL 5 MW, the calculation results show that the nonlinear aeroelastic model can be used for nonlinear response simulation of large scale wind turbine under large load condition and unsteady flow field condition.