Abstract
Based on an elastic rub-impact model, a dynamic model of a rubbing rotor system with an initial deflection was set up and motion equations were derived and solved numerically. Poincaré maps, rotor orbits and bifurcation diagrams were drawn to investigate the effects of the initial deflection distance and the initial deflection angle on the vibration features of the rub-impact rotor system. The paper concluded that the initial deflection had great influence on the motion forms of the rubbing rotor system.
Highlights
The rotor-stator rub is one of the main faults for large rotary machines, and lots of research work has been done by many researchers [1-5]
A more general model of a rub-impact rotor system is set up in light of the elastic impact theory, so as to research the effect of the initial deflection on the vibration characteristics of a rubbing rotor system. Both the initial deflection length and the initial deflection angle are included in the model
Numerical calculation is utilized to solve the governing equations and the simulation results are given in the form of bifurcation diagrams, Poincaré maps and rotor orbits
Summary
The rotor-stator rub is one of the main faults for large rotary machines, and lots of research work has been done by many researchers [1-5]. Vibration characteristics of a rubbing rotor system with the initial deflection have rarely been studied especially in the published literatures. A more general model of a rub-impact rotor system is set up in light of the elastic impact theory, so as to research the effect of the initial deflection on the vibration characteristics of a rubbing rotor system. Both the initial deflection length and the initial deflection angle are included in the model. The initial deflection length and the initial deflection angle are separately chosen as important parameters to carry out the research
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