Abstract
In this paper, the single disk rotor system with a transverse open and close crack has been taken as an example; square wave function has been adopted to express opening and closing characteristics of a transverse crack. The stability on the system has been discussed by theoretical analysis and experimental model study. The conclusions have shown that the unstable vibrations are found in the regions near the rotational speed at 2/3, 2/5and 2/7 of the critical speed in the large crack and the small damping case. The influence of some factors such as the crack depth and the damping on stability of the system is qualitatively discussed.
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