A novel identification tool for rotors working under non-stationary conditions based on the IAS

Emna Sghaier (1, 2) , Adeline Bourdon (1, 2) , Didier Rémond (1, 2) , Jean-Luc Dion (3, 4) , Nicolas Peyret (3, 4)

1 INSA Lyon - Institut National des Sciences Appliquées de Lyon
2 LaMCoS - Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne]
3 QUARTZ - Laboratoire QUARTZ
4 SUPMECA - SUPMECA - Institut supérieur de mécanique de Paris

The aim of this work is to provide a new model describing the dynamic behavior of the rotating machinery working under non-stationary conditions with no assumption on the IAS. This new model will provide an identification tool for the rotor parameters. An example of a simple rotor made of a flexible shaft, a rigid disk, bearings and a mass unbalance is considered. The model shows a coupling between the torsional and flexural behavior and it is proven that, owing to this coupled behavior, the signal of the IAS contains information about, not only the rotation frequency of the response of the rotor, but also about its flexural behavior, when operating under non-stationary conditions.

Domaines: Sciences de l'ingénieur [physics]

Emna Sghaier, Adeline Bourdon, Didier Rémond, Jean-Luc Dion, Nicolas Peyret. A novel identification tool for rotors working under non-stationary conditions based on the IAS. 28th International Conference on Noise and Vibration Engineering, ISMA 2018 and 7th International Conference on Uncertainty in Structural Dynamics, USD 2018, Sep 2018, Louvain, Belgium. pp.2005-2012. ⟨hal-03243279⟩