Frequency-Load Interaction of Imperfect Angle-Ply Cylindrical Panels Under Compression and Pressure
This paper deals with the influence of geometric imperfections on the linear vibration frequencies of thin, laminated angle-ply, simply supported antisymmetric cylindrical panels under axial compression and lateral pressure. It is found that the presence of small geometric imperfections of the order of a fraction of the shell thickness may significantly raise the fundamental frequencies and change the optimal fiber angle that maximizes the frequency. The interaction curves between frequency axial load and frequency-pressure are plotted for graphite-epoxy angle-ply cylindrical panels likely to be encountered in practice.