### ASA 127th Meeting M.I.T. 1994 June 6-10

## 5pSA11. Beamlike vibration of cylindrical shell with attached flat plate
at both ends.

**Svetlana I. Kovinskaya
**

**
**
*Dept. of Acoust., Krylov Shipbuilding Res. Inst., 44 Moskovskoe shosse,
St. Petersburg, 196158, Russia
*

*
*
The beamlike vibration of a thin circular cylindrical shell with attached
thin flat plates at each end is considered. Two mechanisms of the plates'
influence are considered: First, the plates have no stiffness in their own
plane, but have stiffness in the direction transverse to their plane; and
second, the plates have stiffness in their own plane, but not in the transverse
direction. It is shown that the frequency bands are, to a large extent,
influenced by each of the above mechanisms. The equations used for the shell
vibration are based on a simplification concerning the neglect of the axial
bending moment in the shell. The boundary condition equations (equations of
contact) lead to a characteristic equation of beamlike vibration of the shell
with attached plates. The resonance frequencies for the shell with the plates
are determined by experiment also. The results of the calculation of the
resonance frequencies, taking into account the plane displacements of the
plates, are close to the frequency determined experimentally.