Validation of Wind Turbine Structural Dynamics Models
This project studies the validity of structural dynamics models of wind turbine rotor blades. The model validity considered is of hierarchical dual level. On one hand, a detailed structural dynamics model needs to be substantiated by good correlation between experimental results of wind turbine testing and theoretical simulation results using that model. A statistical FE model calibration framework is developed to assess the robustness of the detailed FE model to uncertainty. One the other hand, after that detailed model has been validated, a model of significantly lower order based on the detailed model needs to be validated by a good model-to-model correlation. We developed an efficient modal truncation algorithm to produce a simpler model which accurately approximates its behavior in the operating frequency range of the wind turbines. We concluded that the yielded low-order model can be served in wind turbine design codes.