Si-Chaib, M.OChellil, AhmedNour, AbdelkaderSaci, R.Chikh, N.Chevalier, Y.2015-06-292015-06-29200815th International Congress on Sound and Vibration 2008, ICSV 2008; Daejeon; South Korea; 6 July 2008 through 10 July 2008; Code 98670978-162748151-9https://dspace.univ-boumerdes.dz123456789/2120The present study deals with the identification and evaluation of some dynamic features of a laboratory designed and manufactured rotor. The rotor, embedded-free type, rotates in a vertical position. In the free side of the rotor, a disk with defaults is fixed to simulate some physical and aerodynamic phenomena. A dynamic unbalance which simulates a known specific critical regime is imposed to the structure. This type of aeroelastic dynamic instability, called gyroscope wavering, is characterized by a precession movement of the rotor which develops fatigue and increases loads on the structure. Identification and estimation of features inherent to the vibratory behaviour of the rotor, in this regime, are determined by two approaches: Finite elements and Rayleigh-Ritz methodsenAerodynamic phenomenaDynamic behaviorsDynamic featuresDynamic instabilityExperimental investigationsIdentification and evaluationRayleigh-Ritz methodsVertical positionsSafety engineeringVibrations (mechanical)Vibration analysisArticle