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

Figure 6

(a) Symmetric and (c) antisymmetric vibration amplitude versus excitation frequency for various numbers of flexible panels (κ = 0.2, a = 3 m, b = c = 0.5 m, and ξ = 0.02); (b) symmetric and (d) antisymmetric sound radiation versus excitation frequency for various numbers of flexible panels (κ = 0.2, a = 3 m, b = c = 0.5 m, and ξ = 0.02).

(a)

(b)

(c)

(d)