Research on Vertical Unbalance on the Coupling Flexural and Torsional Vibrations of Rotor
AN Xue-li · Journal of Zhengzhou University · 2008
The coupling between lateral and torsional vibrations of a vertical unbalanced rotor is studied.These coupling mechanisms are studied here with a nonlinear rotor model.An attempt is made to reveal dynamic characteristics of vertical rotor.Qualitative analysis is made for the nonlinear differential equation.And frequency components of coupled vibrations are obtained.Simulation results are also obtained by numerically solving the equations of motion.New torsional of which the main frequency is |ω-ω1| is excited through coupled vibrations when an exterior excited force with frcquency ω1 lies.New flexural vibrations of which main frequency is |ω±ωt1| will also be excited by torsion when an exterior excited moment with frequency ωt1 lies.It is shown that qualitative analysis results and numerical simulation results are consistent.Theoretical support for fault diagnosis is provided by analysis coupled flexural and torsional vibration vertical rotor of the result.