Dynamic Analysis of Load Distribution Optimization in Low-Speed Heavy-Duty Multi-Stage Planetary Gear System

A three-stage planetary gear reducer was designed for low-speed, heavy-load operating conditions, and a dynamic model was established after optimizing the load distribution through floating planet carriers. This model was used to study the nonlinear motion factors in the gear system, with a particular focus on the internal excitation caused by time-varying meshing stiffness. A mathematical analysis model of the mechanism was developed using MATLAB, and the time-varying meshing stiffness curves were derived. The analysis shows that the system exhibits periodic motion with changes in stiffness. Additionally, the load distribution of the system was analyzed based on stiffness variation, and the research indicates that as the stiffness increases, the transmission system experiences greater vibrations and impacts, leading to a decline in load distribution performance. Finally, a kinematic simulation model of the planetary gear system was established using ADAMS. Simulation results demonstrated that load distribution optimization for this transmission system is essential and provided the basis for this conclusion.