Dynamic characteristics analysis of large-scale doubly-fed wind turbine elastic support
The wind turbine is developing towards large-scale and intelligent,the loads of the turbine are increasing exponentially,which puts forward higher requirements for the dynamic design of the turbine components.In this paper takes the elastic support of wind turbine gearbox as the research object,and the dynamic model of entire wind turbine is established by using multi-body multi-dynamics software,coupled with the calculation of aerodynamic load and the control program of wind turbine.The time-frequency characteristics of the dynamic response of the elastic support under uniform wind are calculated,and the influences of wind shear,tower shadow effect and nonlinear stiffness on the elastic support are compared and analyzed.Finally,the dynamic response of the elastic support of the wind turbine under the condition of turbulent wind are simulated.The results show that when the elastic support is damaged and only matches 50%of the stiffness,the response of the elastic support increases sharply,exceeding the vibration standard safety threshold by more than 4 times,which affects the safe and stable operation of the whole wind turbine.
万方数据
维普
