Free Vibration of Cantilever Laminated Annular Sector Plate.

An analysis is presented for the free vibration of a CFRP cantilever annular sector plate. Kinetic and strain energies are obtained in Cartesian coordinates and are then transformed into polar ones for the convenience of the following analysis. The Ritz method is used to derive the frequency equation, and power series are employed as admissible functions. Natural frequencies and mode shapes of symmetrically laminated plates are calculated numerically and are compared with those obtained by the finite-element method and experiments.