Page 311 - Wind Energy Handbook
P. 311
BLADE DYNAMIC RESPONSE 285
300
Out-of-plane
250
200
(kNm) 150
100
50
0
-50
In-plane
-100
0 20 40 60 80 100 120
Time (s)
Figure 5.34 Blade Root Bending Moment in Turbulent Wind
1.0e+10
Blade root moment
Auto spectral density ((Nm) 2 /Hz) 1.0e+08
1.0e+09
1.0e+07
1.0e+06
1.0e+05
Hub thrust force
1.0e+04
1.0e+03
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Frequency (Hz)
Figure 5.35 Spectra of Out-of-plane Loads in Turbulent Wind
