The importance of damping in nonlinear gear meshing simulations

This study investigates the dynamic response of a spur gear pair, focusing on noise, vibration, and harshness (NVH) issues. A novel nonlinear approach, computationally efficient compared to traditional methods, is employed. The model captures the actual rolling motion and engagement using reduced-order models while incorporating the flexibility of gear bodies through a refined finite element model. This allows for accurate analysis without geometric simplifications and preserves all nonlinearities. Even tough experimental results have been reproduced with a high level of fidelity several parameters had to be investigated and updated to achieve those results. The model employs both structural and contact damping models to simulate classical dissipation and the effects of lubrication on the dynamic response which are analysed to understand their in- fluence. The proposed method presents a fast, accurate, and versatile tool for NVH analysis of gear systems, paving the way for further research on including additional components and effects.