Non-linear vibrations : Rotating systems, Rotor dynamics   

The research carried out often combines calculations and measurements, and focuses on the integrity and aggravated testing of on-board rotating machines equipped with hydrodynamic or active magnetic bearings. Lateral instability zones, paths to chaos by activating nT- or quasi-periodic or even chaotic behaviors, and forces in landing bearings have been analyzed. The rotor-stator friction contacts have been implemented in the CAST3M code. In belt drive dynamics, material non-linearities, bending-tension couplings and non-circular pulley profiles are also taken into account. The models developed help optimize operation by taking energy losses into account, and lead to the determination of the most efficient architecture.
Contact : DUFOUR Régis