Dynamic Modeling And Simulation Analysis Of Large MW Wind Turbine Based On Flexible Support

Dynamics analysis of wind turbine system is of great significance to the safe operation of wind turbine system.Based on GL2010,Dynamic modeling of fan system based on SIMPACK simulation software is analyzed and studied.The dynamic characteristics and vibration control method of wind turbine flexible tower under gust excitation are obtained.It has high engineering application value and theoretical significance.The main research contents and conclusions are as follows:(1)Based on multi-body dynamics theory and finite element method,a rigid-flexible coupled multi-body dynamic model of megawatt wind turbine is established.The natural frequencies and modes of a megawatt wind turbine are calculated.The transmission chain model is validated based on GL 2010 standard and FAST software.(2)Combining aerodynamics theory and wind turbine operation control strategy,the aero-elastic-control coupling simulation model of wind turbine is established on SIMPACK simulation platform.On this basis,the dynamic characteristics of megawatt wind turbine are analyzed.(3)The different flexible supports of wind turbines are established,and the dynamic characteristics of wind turbine tower under different flexible foundations are studied.The simulation results show that with the decrease of the rigidity of flexible foundation,the displacement of the top of the tower and the stress of the foundation will increase,and the tower will be damaged or collapsed.Therefore,additional measures should be taken to reinforce the foundation under the foundation with smaller rigidity.(4)To solve the vibration problem of wind turbine tower,a vibration control strategy based on tuned mass damper is proposed to control the vibration of tower structure under pile-soil coupling.The simulation results show that the tuned mass damper designed in this paper can effectively reduce the top displacement and the stress of the tower foundation.