Abstract: To study the damage of wind-sand load to wind turbine, the dynamic response analysis of wind turbine under the load was analyzed. Based on 2 MW wind turbine, three finite element models are established, which do not consider blades, consider blade rotation, and consider soil-structure interaction. The Davenport wind speed spectrum and harmonic superposition method are used to simulate the pulsating wind speed time history, and the dynamic calculation model of wind and sand load is established by the law of conservation of momentum and wind and sand flow density. The dynamic responses of the model under the action of wind load and wind sand load are simulated by ANSYS. The results show that: the response of wind power generation structure under wind sand load is large, and its effect can not be ignored. The results obtained by numerical simulation with simplified lumped mass model are unsafe, and soil-structure interaction has obvious amplification effect on the displacement response under wind load and wind sand load.

Key words: wind turbines, finite element models, wind load, wind-blown-sand load, dynamic response