The Impact of Critical Flutter Velocity in Composite Wind Turbine Blade with Prebend Condition

Table 3

Mode frequency comparison.

Frequency	Meng [26]	Jonkman et al. [28]	Paryaya et al. [5]	Hansen et al. [9]	Present study
1st flapwise	0.72	0.7	0.64	0.7	0.6
2nd flapwise	2.05	2.02	1.86	1.8	1.75
3rd flapwise	4.37	—	4.34	3.6	3.49
1st torsional	5.62	—	5.39	8	6.04