In the present technical note, the stresses and displacements are dete
rmined in an infinitely long circular cylindrical shell reinforced by
a single frame. In the solution, the shell and the ring are considered
separately. External load and interaction force arising from separati
on are expressed as harmonic series, namely Fourier series. A unit dis
placement matrix is obtained for the ring and as well as for the shell
under the interaction forces. Imposing the compatibility conditions.
the amplitudes of the unknown harmonics are obtained. The solution tec
hnique presented can be used for the shell having different boundary c
onditions and different external load configurations.