风力发电结构在风沙荷载激励下的动力响应分析

为研究风沙荷载对风力发电结构的危害,对风力发电结构进行风沙荷载作用下的动力响应分析.基于某2 MW风力发电机,建立不考虑风机叶片、考虑叶片旋转以及考虑土-结构相互作用的三种有限元模型.采用Dav-enport风速谱和谐波叠加法模拟脉动风速时程,利用动量守恒定律和风沙流密度建立风沙荷载力学计算模型.通过ANSYS分别模拟...

Dynamic response analysis of wind turbine structure under wind and sand load excitation

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.