Sound radiation by a hollow circular elastic cylinder rotated in water with a variable angular velocity

In this paper the sound radiation from an elastic circular
cylinder of infinite length rotated with a non-uniform angular velocity in water
is studied. The cylinder is empty inside. Exact solutions of the equations which
describe the hydroelastic interaction are obtained using the Fourier transform
over time. Numerical examples show that the spectral structure of the sound
radiation from an elastic tube is more complicated than that of a solid
cylinder. In particular, the resonances of this structure are essentially
dependent on the thickness of the rotating object and are subject to the
phenomena of dispersion.