Session ENG P501-001 Mode-Frequency Analysis of Laminated Spherical Shell

This paper deals with mode-frequency analysis of a simply-supported equal-sided sector of a laminated spherical shell. The problem is modelled using finite element package program ANSYS. The formulation based on first-order shear deformation theory. Four elements are chosen along each edge of the sector. The reduced method of eigenvalue solution is chosen for the undamped mode-frequency analysis. The first five modes are extracted to obtain the fundamental frequency (first mode natural frequency). The numerical studies are conducted to determine the effects of width-to-thickness ratio (b/h), degree of orthotropy ( 21 E/E), fiber orientations (θ) on the the non-dimensional fundamental frequency. The results are given in graphical form and the obtained results are compared