FREE-VIBRATION OF A LAMINATED COMPOSITE CIRCULAR CYLINDRICAL-SHELL PARTIALLY FILLED WITH FLUID

Free vibrations of partially fluid-filled laminated composite circular cylindrical shells including transverse shear deformation are investi gated using a semi-analytical procedure. In this approach, displacemen ts and rotations of the shell and the dynamic pressure of the fluid ar e modelled by Fourier series and finite elements in the circumferentia l and axial directions, respectively, whereas the dynamic pressure of the fluid is expanded as a power series in the radial direction. The c oupling between symmetric and antisymmetric modes is taken into accoun t in the formulation. Numerical examples are given for free vibrations of partially fluid-filled laminated composite circular cylindrical sh ells with various boundary conditions. Parametric studies including ci rcumferential wave number, fluid depth, thickness to mean radius ratio , length to mean radius ratio and boundary condition are carried out. (C) 1997 Elsevier Science Limited.