Analysis For Dynamic Of Basis-Bearing Stator System

As the rapid development of regenerationtive energy mark, wind energy as a kind of clean and renewable energy has attracted more and more attention. Followed, the wind power technology has been rapid quickly.The wind turbine transmission system is one of the important components, and its main function is to increase the speed.Due to the randomness of the velocity, the wind turbine transmission system works long-term under the complex alterate load, which will cause the damage of the internal structure of the wind turbine transmission system, reduce the wind turbine transmission system’s stability, and increase the workload in maintenance. In order to reduce wind turbine transmission system failures caused by vibration, improve the reliability of transmission system. Therefor, it is necessary to drive dynamics analysis for wind turbine transmission system.This article introduces the drive system dynamics analysis of the status, the vibration under the operating conditions,and analyze the coupling vibration of the transmission system. The wind turbine transmission system was reduction to rotor-bearing-stator system. Support stiffness, eccentricity, rotate speed and rolling bearing were considered, and established rotor-bearing-stator dynamics models. According to those models, Langrange’s quation was used to derive the dynamic equation of transmission system. The dynamic responses of the transmission system are investigated based on internal and external motivation and analyzed the response in the frequency domain characteristics.The research of thie paper can provide some theoretical referemces for the engineering design of the wind turbine transmission system and laid the foundation for the industry application.