Dynamic Characteristics of an Offshore Wind Turbine with Tripod Suction Buckets via Full-Scale Testing

Table 5

Comparison of measured and predicted values of natural frequency.

		Natural frequency (Hz)
		Stage II	Stage III	Stage IV
Measurement		1.380	0.387	0.318
Prediction	Case 1 with	1.530	0.391	0.334
	(Error w.r.t. exp., %)	(10.87)	(1.03)	(5.03)
	Case 4 with	1.420	0.380	0.325
	(Error w.r.t. exp., %)	(2.89)	(1.81)	(2.02)
	Case 4 with	1.360	0.374	0.320
	(Error w.r.t. exp., %)	(1.45)	(3.36)	(0.94)