Abstract
A thin cylindrical shell driven in vacuum below its radial resonance by a point force may be described by membrane theory. Each nonaxisymmetric modal impedance contains a resistance and a mass of equal magnitude, as in the case of an infinite bar. The impedance decreases with increasing mode number up to a “cutoff” mode, and stiffness effects become important for modes above the cutoff mode. The analysis includes finite shells and rings.
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