Study on the inherent characteristics of planetary gear transmissions

This article describes a novel modeling method for a rigid-flexible coupled planetary gear transmission system, which consists of rigid and elastic ring gear subsystems. The rigid gear subsystem model was established using the lumped parameter method while the elastic ring gear subsystem was established using the finite element method. According to the compatible state of deformation between mesh force and ring gear deformation, the natural frequency and vibration modes were determined, and the distribution rules of the natural frequency for this coupled system were established. The vibration modes were classified into six different modes based on the vibration characteristics of the system. This article provides a theoretical basis for the dynamic design of a rigid-flexible coupled planetary gear transmission system.