译 名：
Numerical Simulation for Inner Dynamic Excitation and System Vibration Response of Speed Increasing Gearbox
作 者：
Lin Tengjiao Li Runfang Yang Chengyun Hang Huajiang (Chongqing University)
关键词：
Speed changing gear boxes, Excitation, Dynamic respond, Finite element method
摘 要：
Based on the theory of gear engagement and 3 D finite element method for contact problem, a finite element analysis program of meshing gears was developed. With the help of this program, the time variable stiffness curves of meshing teeth pairs could be acquired. The gear error curves were computed according to profile tolerance which was determined by the machining precision of gearing. With above method, the inner dynamic excitation including stiffness excitation and error excitation was obtained. Using the finite element analysis software (I DEAS), the dynamic model of speed increasing gearbox was established. Then the natural frequencies of whole gearbox were calculated, and the vibration responses of gearbox and transmission shafts were simulated. The calculating results reflected the vibration characteristics of gearbox correctly. It also indicated that resonance phenomenon would not appear in this structure and the root mean square (RMS) values of vibration velocity of gearbox were less than allowable values.
