3-D VIBRATION ANALYSIS OF FIBER-REINFORCED COMPOSITE LAMINATED CYLINDRICAL-SHELLS

In this paper, 3-D solutions of free vibrations are presented for isot ropic and composite laminated cylindrical shells. The perturbation met hod and a variational principle are used to obtain the solutions which satisfy the 3-D differential equations of motion, the strain-displace ment relations, the stress-strain relations, the boundary conditions a nd the continuity conditions at layer interfaces. The distributions of displacements and stresses in the shells are shown in figures. The fr ee vibration frequencies are listed in tables. In the thickness direct ion of the shells, continuous displacements and stresses are obtained. And the importance of transverse shear stresses and transverse normal stress is analyzed.