Dynamics Analysis and Structural Optimization Design of a Three-Stage Gearing

This paper proposed a method for analyzing the static strength and dynamic behaviors of a three-stage gearing with given parameters by using FEM and the parametric optimization design of the gearing. The 3D FE model of the whole gearing is developed using unique 20 node brick elements. Then all loads are exerted on the FE model to check the static strength of the gearing. The dynamics model is established based on considering transmission error excitation and shaft compliance as main vibration-exciting facts. In order to improve the transmission performance and suppress noises and vibrations of the gearing, a structural parameter optimization method is proposed to minimize the total weight and noise level of the gearing through optimizing some main parameters of the gearing such as modules, tooth numbers and distances between axes. The optimization results are validated by simulation experiment.