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

Table 5

The bottom bending moment of the wind turbine with different mass ratios of BTMD.

Mass ratio	El-Centro		Chalfant		Artificial wave
	LFEM	CBFEM	LFEM	CBFEM	LFEM	CBFEM
Without	50989.6	48402.90	39391.70	36431.90	64822.80	62616.90
0.01	44702.4	41204.40	36846.60	35289.10	57728.02	58764.70
0.02	40158.8	31663.20	36374.10	34873.00	51209.89	52848.00
0.03	39741.6	29572.00	35905.60	34463.80	48794.62	49514.90
0.04	39347.7	28437.10	35443.00	34059.20	47383.48	47441.00
0.05	38957.2	27424.70	34987.60	33661.30	46466.11	46423.00