Dynamic analysis of the high-speed flexible rotors supported on the electrodynamic passive magnetic bearings

Abstract

In the paper comparative rotor-dynamic analyses are carried out for various rotor-shaft systems supported on the classical journal-, rolling element- and on the passive magnetic bearings. The investigations are performed by means of the advanced 3D finite element model of the electrodynamic passive magnetic bearing and of the structural model of the rotor-shaft—bearing systems, using which proper Campbell diagrams, amplitude—frequency characteristics and complex eigenvalues have been determined as well as numerical simulations of rotor-shaft transient dynamic responses were carried out. The presented study is focused on the lateral vibration damping abilities realized by the mentioned above bearing types. In this way, advantages of the prospective passive magnetic bearing have been emphasized.