Dynamic simulation analysis of gear transmission shaft considering forced vibration

At this stage, the research on gear transmission structure is mainly concentrated in the field of vehicle transmission, reducer and other mechanical equipment manufacturing. Considering that the gear in the actual operating conditions will be affected by a variety of external factors, the running state of the interference, resulting in machining accuracy deviation, serious will lead to gear transmission process failure. Considering that it is difficult to accurately diagnose all kinds of fault signals under the existing conditions, the vibration state of the transmission shaft will have a significant impact on the stable operation of the system during the operation of the whole system. So far, most scholars usually analyze some simplified models and obtain the required results by means of dynamic calculation. Through the above process to complete the analysis of gear structure and system performance, at the same time, the optimization design scheme is adopted and the system operation reliability is analyzed.

There are many reports on the dynamic research of transmission shaft in gear structure, and many kinds of calculation methods have been formed, such as time domain method, algebraic analysis method, test method, frequency domain method and so on. In dynamic analysis, it is necessary to calculate the differential equation of the system motion process and construct the transfer function [7]. Different methods can be used to solve the problem. When the time domain method is selected, the time-varying dynamic parameters of the components in the system can be calculated in different time domains, while when the frequency domain method is used, the system parameters in different frequency domains can be obtained. At the same time, the running state of the gear also has a significant impact on the time-varying meshing stiffness and control accuracy, which shows that the results of excitation changes with periodic characteristics at different times, and the time-domain processing also shows similar periodic dynamic response characteristics.

It can be seen that according to the time and frequency domain changes of the research object, the frequency characteristics of the system response process can be more deeply grasped, and the accurate relationship among the system, excitation and response can be established.