Fig. 8.39 A plot for variation of characteristic equation as function of the whirl frequency at a 500 rad/s as spin speed of the rotor

Fig. 8.40 A plot for variation of characteristic equation as function of the whirl frequency at a 0 rad/s as spin speed of the rotor

Fig. 8.41 A plot for variation of characteristic equation as function of the whirl frequency at a 1500 rad/s as spin speed of the rotor

Fig. 8.42 The Campbell diagram for the rotor system

Answer .