The Analyses of the Critical Speed and Unbalance Response in the Rotor System

Linear finite element analysis model of the typical rotor system is established by the finite element method. Considering the gyroscopic effect of the rotor, critical speed in the rotor system is solved. Then the effect of the rotor system by the unbalanced force on dynamic characteristic is analyzed by frequency response curve. The result shows that support damping coefficient has a great effect on critical speed in the rotor system. With the support from rigid support to elastic support, the critical speed greatly reduces. Because of the unbalance exciting force, maximum resonance amplitude of the disk is near the critical speed of the rotor.