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

Table 2

(2,1) mode peak vibration amplitude convergence for various excitation magnitudes (3 antisymmetric structural modes, ζ = 0.02).

No. of acoustic modes	κ = 0.05	0.2	0.5
1	62.5	69.5	75.2
4	100.1	100.0	99.9
6	99.8	99.8	99.6
7	100.0	100.0	100.0