Abstract
The scattering of plane steady-state sound waves from a viscous
fluid-filled thin cylindrical shell weak- ened by a long linear slit and
submerged in an ideal fluid is studied. For the description of vibrations
of elastic objects the Kirchhoff-Love shell-theory approximation is used.
An exact solution of this problem is obtained in the form of series with
cylindrical harmonics. The numerical analysis is carried out for a steel
shell filled with oil and immersed in seawater. The modules and phases of
the scattering amplitudes versus the dimensionless wavenumber of the
incident sound wave as well as directivity patterns of the scattered field
are investigated taking into consideration the orientation of the slit on
the elastic shell surface. The plots obtained show a considerable
influence of the slit and viscous fluid filler on the diffraction process.
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