THE ANALYSIS OF STATIC AND DYNAMIC RESPONSES IN SPUR GEAR MESHING ON THE BASIS OF FINITE ELEMENT SIMULATION AND INTERRELATED FRICTIONAL EFFECT

摘要

To control and decrease noise and vibration of the meshing gears, the situation of contact stress and transmission error should be researched very carefully. Although the finite element method can analyze the contact stress and transmission error situations with the static boundary conditions which have ignored inertia, rotary speed and damping, the accuracy of the result must not be very satisfied because the dynamic characters will influent the actual situations obviously. So to simulate actual gear meshing process, some most typical dynamic characters and frictional effect should be considered adequately due to the friction must exist. In this paper, the typical static and dynamic contact stress and transmission error responses of spur gear will be displayed by discussing the situations of gear tooth root bending stress and transmission error with static and dynamic boundary conditions. In addition, the friction coefficient has been defined as a boundary condition variable to display distinct frictional effect on gear tooth root bending stress and transmission error. Basically, the results of static and dynamic model are very similar, but there are also some significant differences between static and dynamic responses due to various dynamic excitations.