Analysis on Bending-torsional Coupled Vibration of Cracked Rotor
Zhao Yucheng   Li Shunming  Xu Qingyu
(Xi'an Jiaotong Unviersity  710049)

Abstract: In this paper we have researched the bending-torsional coupling characteristic of cracked rotor,
and analysed the influence about torsional vibration to bending vibration. The result of numerical analysis
indicates that it isn't advantaged for early forcasting and diagnosis to little crackle of rotor which the cracked
charateristic disappear owing to coupling of torsional vibration. The coupling of torsional vibration cann't
change the working frequency position, and make the axes track to be unstability.
Keywords: cracked rotor, bending-torsional coupling, nonlinear vibration.