Seismic Vibration Mitigation of Wind Turbine Tower Using Bi-Directional Tuned Mass Dampers

Table 2

Parameters of BTMD.

	Mass ratio	Frequency ratio	Damping ratio (%)	Mass (kg)	Stiffness (N/m)	Damping (N·s/m)
1	0.01	0.9900	6.09	2086.78	9269.53	535.69
2	0.02	0.9804	8.58	4173.56	18181.25	1493.93
3	0.03	0.9709	10.45	6260.34	26744.00	2704.34
4	0.04	0.9615	12.00	8347.12	34974.04	4100.65
5	0.05	0.9523	13.36	10433.90	42884.94	5652.13