Internal Resonance Phenomena of an Asymmetrical Shaft-Disk System (Critical Speed of Twice the Major Critical Speed)

摘要

Unstable vibrations appear around several critical speeds in asymmetrical rotor systems with nonlinear spring characteristics. However, when the natural frequencies satisfy an internal resonance relation exactly or approximately, these phenomena may change remarkably. In this paper, such internal resonance phenomena of an asymmetrical shaft-disk system are studied theoretically and experimentally. The changes in nonlinear phenomena during the transition from the system with internal resonance to the system with no internal resonance are also investigated.