Comportement dynamique des lignes d'arbre de turbomachines

Abstract

High speed rotors set a lot of stabilily problems especially when the speed of rotation is going through a critical speed. The dynamical behavior of the fluid bearings has, in that case, an important ef/ect. This study presents two examp/es of coup/ing between fluid e/ement and flexibility of the shaft:-the coupling between the axial thrust bearing behavior and the bending vibrations of the shaft will be studied.-the behavior ofa shoft with flexible wheel-shaft and bearing-shoft coupling.