PSI - Issue 12

A. Cetrini et al. / Procedia Structural Integrity 12 (2018) 87–101

94 8

Author name / Structural Integrity Procedia 00 (2018) 000 – 000

Fig. 3. Representation of the test case wind turbine and of its geometrical scheme

The support structure of the generator has been dynamically characterized by accelerometer tests carried out with instrumented hammer (Cianetti et al. (2018), Castellani et al. (2017)). 4.2 FE model reduction As stated above, the objective of the paper is to present a method for transforming a generic support structure of a wind turbine into an equivalent cantilever beam structure. Table 1. Test case wind turbine characteristics (see also fig.4)

Wind Turbine Parameters

Values

Units

Maximum Power Cut in Wind speed Cut off Wind speed

2800

W

3.0

m/s m/s

15.0

Blades number

3

no units

Lp Ht Hv

1.0

m m m m m m

0.98 0.55 0.95 0.13 0.20

Hacc

XG YG

First of all, the Fem model of the original structure, proper to the turbine present in the wind tunnel, was built, Fig. 4, a. At this point, following the logic reported in Section 3.1, the equivalent cantilever-beam model was built, Fig. 4,b.