  An asymptotically exact two-dimensional theory of functionally graded
piezoelectric shells is derived by the variational-asymptotic method. The error
estimation of the constructed theory is given in the energetic norm. As an
application, analytical solution to the problem of forced vibration of a
functionally graded piezoceramic cylindrical shell with thickness polarization
fully covered by electrodes and excited by a harmonic voltage is found.
