Nonlinear Dynamics of a Blade Rotor with Coupled Rubbing of Labyrinth Seal and Tip Seal

Figure 5

Bifurcation diagrams and Lyapunov exponents of the rotor with rubbing: (a) rubbing of labyrinth seal; (b) tip rubbing; (c) coupled rubbing at the rotor’s running up; (d) coupled rubbing at the rotor’s slowing up. RC is the range of rotation velocity of labyrinth rubbing; RB is the range of rotation velocity of tip rubbing; LE is the Lyapunov exponents.

(a)

(b)

(c)

(d)