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

Figure 21

The reduction ratio of the bottom bending moments induced by bi-directional earthquakes. (a) The peak value in fore-aft direction. (b) The peak value in side-side direction. (c) The standard deviation in fore-aft direction. (d) The standard deviation in side-side direction.

(a)

(b)

(c)

(d)