Research Article

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

Figure 3

(a) The vibration amplitude ratio versus the 1st nonlinear resonant frequency ( , 0.9, 1 mm). (b) The vibration amplitude ratio versus the 2nd nonlinear resonant frequency ( , 0.9, 1 mm).
391584.fig.003a
(a)
391584.fig.003b
(b)