Nonlinear Vibration Analysis for a Jeffcott Rotor with Seal and Air-Film Bearing Excitations

Figure 3

Motions of the rotor system with rotation speed $S=3.355$.

(a) Poincaré map of displacement $x_1$

(b) Time history of displacement $x_1$

(c) Orbit of the disk center

(d) Orbit of the left bearing