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

Figure 15

Phase portrait (a), FFT power spectra (b), and Poincare maps (c, d) for 𝜎₂=117.4201, 𝜇=0.05, 𝑣₁=10, 𝛼=0, and 𝜎₁=92.39.

(a)

(b)

(c)

(d)