Dynamic model of a deep grooves ball bearing dedicated to the study of instantaneous angular speed of rotating assemblies

Nathanael Thibault (1, 2) , Adeline Bourdon (3) , Didier Rémond (3) , Damien Lecouvreur (2)

1 INSA Lyon - Institut National des Sciences Appliquées de Lyon
2 Safran Helicopter Engines
3 LaMCoS - Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne]

The present paper describes a ball bearing model for transmission monitoring and adapted to non-stationary operating conditions. The model considers axial forces in bearing as well as centrifugal forces applied on rolling elements making it suitable for high speed and axially loaded systems. A spall is also introduced to study its detectability. The model is based on an "angular" approach which preserves the complete main rotation of the shaft and is not limited to the torsional deflections. Results obtained by modeling a simple system under different operating conditions with healthy and damaged bearings are discussed to highlight the bearing behavior dependence on axial load and nominal speed. It is showed that the increase of nominal speed mainly affects the repartition of the power on the harmonics of the bearing signature while the increase of axial load leads to lower influence of the bearing on the Instantaneous Angular Speed (IAS). Simulations performed including spall defect on outer ring pointed out the impact of the damage on the IAS and its detectability.

Domaines: Mécanique des structures [physics.class-ph]

Nathanael Thibault, Adeline Bourdon, Didier Rémond, Damien Lecouvreur. Dynamic model of a deep grooves ball bearing dedicated to the study of instantaneous angular speed of rotating assemblies. Tribology International, In press, ⟨10.1016/j.triboint.2022.107753⟩. ⟨hal-03709919⟩