PSI - Issue 17

Pedro J. Sousa et al. / Procedia Structural Integrity 17 (2019) 812–821 Author name / Structural Integrity Procedia 00 (2019) 000 – 0 0

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Fig. 9. Displacement along the Z direction at instant 1.0 s. The grey shadow represents the original shape of the blades. (Displacement in meters)

(a) Displacement along X

(b) Displacement along Y

Fig. 10. Displacement along the X and Y directions at instant 1.0 s. (Displacements in meters)

4. Discussion

As the same coordinate system was used for both the simulation and the measurements, it is possible to compare the obtained results directly. It is noticeable that there is some disagreement, both quantitative and qualitative, between the experimental and numerical results. For example, the numerical results for Y show an increasing displacement between the hub connection and the blade tip. This is likely to be due to not including the gaps between the hub and the blade, as these displacements show a typical progression for embedded situations. Due to the way the model was