Analytic Formula for the Vibration and Sound Radiation of a Nonlinear Duct

Table 1

(1,1) mode peak vibration amplitude convergence for various excitation magnitudes (3 symmetric structural modes, ζ = 0.02).

No. of acoustic modes	κ = 0.05	0.2	0.5
1	78.7	82.4	84.7
4	99.9	99.9	99.7
6	100.0	100.0	100.0
7	100.0	100.0	100.0