Analysis of Influencing Factors of Vibration Features of Rubbing Rotor

In the one hand,rotor-stator rubbing is common in rotor system.In the other hand,its mechanism is very complex and its damage is very heavy.Therefore,great attention has been paid to research on vibration behavior of rotor with rub.Aiming at the Jeffcott rotor which is supported by both ends of rigid shaft,a nonlinear differential equation of rubbing rotor with bending-torsional coupling vibration is established.Using the Runge-Kutta method,nonlinear dynamic equations of the model were solved,based on four groups of experimental data.And using the Poincare mapping,the axis track chart and the displacement diagram,the nonlinear responses and dynamics characteristics(such as chaotic etc)of rubbing rotor system are analyzed.Finally,some beneficial conclusions are obtained for vibration characteristics of rotor-stator rub.Thus,theoretical foundations are established for some possible applications,such as optimization design and the application of malfunction diagnosis of rubbing rotor system.