Vibration and noise analysis of two-stage marine planetary reducer

The dynamic response of the gear box is researched in consideration of the time-varying mesh stiffness, gear errors, mesh phase and sliding bearing stiffness. The dynamic response model is set up and solved by using mode superposition method. The time history of node acceleration of the gearbox is obtained, and the effect of the frequency components of the excitation on dynamic response of the gearbox is re-searched. Structural-acoustic coupling noise response analysis is done. The effect of the gearbox thickness and damping coat on the noise radiation is researched. The study provides useful theoretical guideline to the design of the marine gearbox.