non-linear analysis of asymmetrical eccentrically stiffened fgm cylindrical shells with non-linear elastic foundation

In this paper, semi-analytical method for asymmetrical eccentrically stiffened fgm cylindrical shells under external pressure and surrounded by a linear and non-linear elastic foundation is presented. the proposed linear model is based on two parameter elastic foundation winkler and pasternak. according to the von karman nonlinear equations and the classical plate theory of shells, strain-displacement relations are obtained. the smeared stiffeners technique and galerkin method, used for solving nonlinear problem. to finding the nonlinear dynamic response of fourth order runge-kutta method is used. the effect of parameters asymmetrical eccentrically stiffened on the nonlinear dynamic buckling response of fgm cylindrical shells have been investigated.