DYNAMIC ANALYSIS OF HETEROGENEOUS ANISOTROPIC PLATES RESTING ON THE PASTERNAK ELASTIC FOUNDATION

In this study, the effects of elastic foundation on the frequencies of the heterogeneous orthotropic plates using shear deformation plate theory are investigated. Pasternak elastic foundation model is used to define the reaction of two-parameter elastic media on the plate. The formulation of the problem is based on the Donnell type plate theory. The Young's moduli of heterogeneous orthotropic material change as exponential function, Poisson's ratio and density are considered constant. The basic partial differential equations are reduced to ordinary differential equations using Galerkin method and closed-form solution is obtained for the frequency of heterogeneous orthotropic plates. The obtained values are compared with those in the current literature and the results were confirmed. Finally, a parametric study is performed to show the effects of heterogeneity, shear stresses and elastic foundations on the frequency parameters