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Abstract:
The nonlinear rigid rotor model with four degrees of freedom is
constructed to study the rotor/stop rubbing vibration. Numerical
integration method is used to extract the forced response of the rotor
excited both by the unbalance and the low frequency excitation. The
analysis on the rubbing contact ratio and the frequency spectrum of the
vibration reveals the characters of the double-frequency precession, the
partial rubbing, the quasi-full rubbing and the full rubbing. Both the
numerical simulation and the experiments on the rotor/stop rubbing
conclude that the increasing of the low – frequency excitation does not
cause the full rubbing between the stop and the rotor with small
unbalance. But the rising of the excitation makes the quasi – full
rubbing turn into full rubbing under middle unbalances and makes the
partial rubbing fall into full rubbing under large unbalances.
Key words:
Rotor
Stop Rubbing Unbalance
CLC No: TH133
中国博士后科学基金项目. Received 20000817,
received in revised form 20001228
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