A Study of the Influence of Time-varying Meshing Stiffness on Dynamic Response in Gear Transmission Systems

摘要

Broken teeth are one of the main faults in the gear transmission system. The existing models could not accurately reflect the dynamic features of broken teeth in the fault diagnosis of gear transmission system. When broken teeth appear, the broken teeth will influence on the time-varying meshing stiffness. Therefore, optimizing the parameter of dynamics model system can improve the accuracy of the fault feature extraction for the fault diagnosis of gear transmission system. This paper mainly studies the influences of broken teeth on the time-varying meshing stiffness. Through optimizing the time-varying mesh stiffness, a gear mechanism system dynamic model is built for the simulation analysis. It aims to validate the optimized parameter setting method can more accurately reflect the characteristics of the gear fault. The analysis results show that when the failure of the broken tooth occurs, the time-varying meshing stiffness presents instantaneous shock, which is the function of the meshing frequency, and is also related to the size of the broken tooth. By studying the time-varying meshing stiffness of the broken teeth, it can provide more reliable fault information for fault diagnosis of gear transmission system.