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According to the characteristics of the gearbox and Lagrange mechanics, in this paper a bidirectional rotary vibration system dynamics model of the gearbox is established, using MATLAB to simulate the model, study the vibration characteristics of the system in both horizontal and vertical directions, and compare it to existing simplified models. Through the analysis of the model, the conditions of the system that produce frequency trapping are studied, and the frequency factors of the system are obtained. The results indicate that reducing eccentric mass, eccentricity, and rotary damping, and increasing damping movement, bearing stiffness, and input torque can improve system response speed and reduce the amplitude, which can avoid frequency trapping of the system. The study provides a theoretical basis for optimization and installation of the gearbox system.

Frequency Capture Characteristics of Gearbox Bidirectional Rotary Vibration System