1. The State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400030, China 2. CSIC (Chongqing) Haizhuang Windpower Equipment Co., Ltd., Chongqing 401122, China
The reliability and service life of wind turbines are influenced by the complex loading applied on the hub, especially amidst a poor external wind environment. A three-point elastic support, which includes the main bearing and two torque arms, was considered in this study. Based on the flexibilities of the planet carrier and the housing, a coupled dynamic model was developed for a wind turbine drive train. Then, the dynamic behaviors of the drive train for different elastic support parameters were computed and analyzed. Frequency response functions were used to examine how different elastic support parameters influence the dynamic behaviors of the drive train. Results showed that the elastic support parameters considerably influenced the dynamic behaviors of the wind turbine drive train. A large support stiffness of the torque arms decreased the dynamic response of the planet carrier and the main bearing, whereas a large support stiffness of the main bearing decreased the dynamic response of planet carrier while increasing that of the main bearing. The findings of this study provide the foundation for optimizing the elastic support stiffness of the wind turbine drive train.
Bearing stiffness and damping of the planet carrier
kpc
Bearing stiffness and damping of planets
?k1st
Bearing stiffness and damping of the spline shaft
kps
Meshing stiffness and damping sun-planet gear pair
?k2nd
Bearing stiffness and damping of the middle stage shaft
kpr
Meshing stiffness and damping ring-planet gear pair
?k3rd
Bearing stiffness and damping of high-the speed stage shaft
ks
Spline stiffness and damping
?km
Bearing stiffness and damping of the main shaft
kwp1
Meshing stiffness and damping middle stage gear pair
?kt1/kt2
Elastic supporting stiffness and damping of the torque arms
kwp2
Meshing stiffness and damping high-speed stage gear pair
?kg
Elastic supporting stiffness and damping of the generator
Tab.4
Fig.3
Fig.4
Fig.5
Fig.6
Fig.7
1
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