37 Development of Simplified Models for Wind Turbine Blades with Application to NREL 5 MW Offshore Research Wind Turbine 401 0 1 2 3 4 5 -1 -0.5 0 0.5 1 1.5 t (sec) Excitation (KN) 0 1 2 3 4 5 -0.05 0 0.05 0.1 0.15 t (sec) Total Error (m) Baseline model, Nr=6 Beam model, Nr=6 0 1 2 3 4 5 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 t (sec) Flapwise tip disp. (m) Baseline model, Full Beam model, Full 0 1 2 3 4 5 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 t (sec) Flapwise tip disp. (m) Baseline model, Full Baseline model, Nr=6 Beam model, Nr=6 0 1 2 3 4 5 -0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2 t (sec) Edgewise tip disp. (m) Baseline model, Full Beam model, Full 0 1 2 3 4 5 -0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 t (sec) Edgewise tip disp. (m) Baseline model, Full Baseline model, Nr=6 Beam model, Nr=6 a b c d e f Fig. 37.8 Comparison of the performance of the full and reduced models of the baseline and beam models in response to multisine signal. (a) the designed multisine signal, (b) the total approximation errors, the flapwise (c) and edgewise (e) tip displacement of full models, the flapwise (d) and edgewise (f) tip displacements of the reduced models
RkJQdWJsaXNoZXIy MTMzNzEzMQ==