1.The State Key Laboratory of Mechanical Transmissions,Chongqing University,Chongqing 400030,China;
2.Chongqing Wangjiang Industry Co.,Ltd.,Chongqing 400071,China
A high power wind turbine gearbox is one of the key parts in wind turbine.The stability performance of the wind turbine is influenced by the characteristics of the wind turbine gearbox.According to the parameters and conditions of a typical wind turbine gearbox,the sub-structure model of the wind turbine gearbox transmission system was built considering the time-varying mesh stiffness and transmission errors.Base on the theory of uniform bend Timoshenko bean and cantilever beam,the sub-structure model of the housing structure system was established.On the strength of the deformation compatible conditions for the models of the transmission and box sub-structure,a coupled dynamic model of high power wind turbine gearbox was built and the vibration responses of the coupled system was calculated.The results show that the structure frequencies of the system were excited by the gear meshing of the different stages in the coupled system.The resonance does not occur between the structure response and gear mesh frequencies.The vibration acceleration frequency of the system composed of the frequency modulations except for the gear mesh frequencies of the system.Finally,the analysis results were compared with the results from the rig test.
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