Parametric and Internal Resonances of an Axially Moving Beam with Time-Dependent Velocity

Figure 9

Phase portraits (a, b) and time histories (c, d) in the upper nontrivial stable branch of the frequency response curve of Figure 8 for 𝜎₂=68.2799, 𝜇=0.05, 𝑣₁=10, 𝛼=0, and 𝜎₁=92.39.

(a)

(b)

(c)

(d)