[Back]

H. Ecker, T. Pumhössel, A. Tondl:
"A Study on Parametric Excitation for Suppressing Self-Excited Rotor Vibrations";
in: "Proceedings Sixth International Conference on Rotor Dynamics", IFToMM, 2002, ISBN: 0-7334-1963-1, 85 - 92.

This contribution deals with the suppression of self-excited vibrations in a rotor system. Internal damping of the rotor shaft and cross-coupling gap excitation are considered as sources of destabilizing forces. Vibration cancellation is achieved by harmonically varying the bearing stiffness parameter. The effectiveness of the proposed method is demonstrated by numerical simulation of an elastically supported Jeffcott-rotor. It is remarkable that within the regime of self-excitation, vibrations can be suppressed or at least reduced simultaneously at the rotor disk and at the bearing stations. Parameter studies show that vibration suppression is possible within a rather large range of mass and stiffness parameters of the rotor system.