Due to the increase of height and blade size of the wind turbine tower（WTT）structure

the wind-induced vibration responses of WTT structure have great impact on the reliability of the structures.In this paper

a set of energy dissipation device for the WTT structure is designed and analyzed by using the superelasticity effect of shape memory alloy（SMA）.A bilinear hysteretic model for SMA superelasticity is proposed and integrated into Abaqus software for numerical analysis.Taking a large size wind turbine generator（WTG）of 1.5MW as an example

a finite element model（FEM）for numerical analysis of the SMA-WTT coupled structure is set up and the analyses for the dynamics performance

wind-induced responses and vibration control are performed.The numerical results show that the peak horizontal displacement and acceleration at the top of the tower equipped with the SMA energy dissipation device are reduced to 45% and31%

respectively

compared with its non-controlled status

and the proposed SMA energy dissipation device can effectively control the dynamic responses of WTT structures.