Optimization of a Two Joint Cross-Ply Laminated Conical Shells to Minimize the Natural Frequencies
نویسنده
چکیده
This study deals with the vibrational behavior of two joined cross-ply laminated conical shells. Natural frequencies and mode shapes are investigated. Joined conical shells can be considered as a general case for joined cylindrical-conical shells, joined cylinderplates or cone-plates, cylindrical and conical shells with stepped thicknesses and also annular plates. Governing equations are obtained using thin-walled shallow shell theory of Donnell type and Hamilton’s principle. The equations are solved assuming trigonometric response in circumferential directions and series solution in meridional directions. All combinations of boundary conditions can be assumed in this method. The effects of semi-vertex angle, meridional length and shell thickness on the natural frequencies and circumferential wave number of joined shells are investigated. The finite element analysis is conducted to predict the natural frequencies of isotropic and composite specimens.
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