Analysis of the Nonlinear Structural-Acoustic Resonant Frequencies of a Rectangular Tube with a Flexible End Using Harmonic Balance and Homotopy Perturbation Methods : Figure 5

(a)

(b)

Figure 5: (a) The vibration amplitude ratio versus the 1st nonlinear resonant frequency (, 1.5, 2.0). (b) The vibration amplitude ratio versus the 2nd nonlinear resonant frequency (, 1.5, 2.0).