DQM Free Vibration Analysis of Multi Span Composite Laminated Plates

Abstract

A global numerical technique, the differential quadrature (DQ) method, is examined here for its suitability to solve the boundary-value problem of symmetric and asymmetric cross-ply laminates using the first-order shear deformation plate theory. The frequency parameters of symmetric and asymmetric cross-ply laminates, subject to elastic restraints constraints, are investigated. In this study, the method is used to transform the sets of governing differential equations and boundary conditions of the laminated plates into sets of linear algebraic equations. Boundary conditions along the edges are implemented through the discrete grid points by constraining the displacements, bending moments and rotations. In this study the eigen values and mode shapes are investigated for different variables.