Optimum Vibration Design of Angle-Ply Laminated Fibrous Composite Cylindrical Panels by Elitist-Genetic Algorithm

In this paper, fundamental frequency optimization of angle-ply laminated cylindrical panels is investigated by the Elitist-Genetic algorithm (E-GA). The number of layers, the fiber orientation angles, edge conditions, length/width and length/R ratios are considered as design variables. The classical shell theory (CST) (Donnell’s formulation) is applied to calculate the natural frequencies of laminated cylindrical curved panels. To improve the speed of the optimization process, the elitist strategy is used in the Genetic algorithm and the fitness function is computed with a semi-analytical finite strip method. A program based on Maple is used for this purpose. To check the validity,the obtained results are also compared with some other stacking sequences