Study of the non-linear dynamic response of a rotor system with faults and uncertainties

Jérôme Didier (1) , Jean-Jacques Sinou (1) , Beatrice Faverjon (2)

1 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes
2 LaMCoS - Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne]

In this paper, the quantification of uncertainty effects on the variability of the nonlinear response in rotor systems with multi-faults (such as unbalance, asymmetric shaft, bow, parallel and angular misalignments) is investigated. To take account of uncertainties in this kind of nonlinear problem, it is proposed to use the Harmonic Balance Method (HBM) with a polynomial chaos expansion (PCE). The efficiency and robustness of the proposed methodology is demonstrated by comparison with Monte Carlo simulations (MCS) for different kinds and levels of uncertainties.

Mots clés: uncertainties; dynamics; rotor; faults

Domaines: Vibrations [physics.class-ph]; Vibrations [physics.class-ph]; Mécanique [physics.med-ph]; Mécanique des structures [physics.class-ph]; Mécanique des structures [physics.class-ph]; Mécanique des solides [physics.class-ph]; Mécanique des solides [physics.class-ph]; Systèmes dynamiques [math.DS]

Jérôme Didier, Jean-Jacques Sinou, Beatrice Faverjon. Study of the non-linear dynamic response of a rotor system with faults and uncertainties. Journal of Sound and Vibration, 2012, 331, pp.671-703. ⟨10.1016/j.jsv.2011.09.001⟩. ⟨hal-00733295⟩