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Abstract
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This study investigates the free vibration behavior of a rotating sandwich circular annular plate featuring a porous core and polymeric nanocomposite face sheets reinforced with carbon nanotubes (CNTs). Different distribution patterns of CNTs are explored for the face sheets, including uniform distribution (UD), and functionally graded (FG) patterns such as FG-A, FG-V, FG-X, and FG-O. Moreover, uniform and symmetric non-uniform porosity distribution patterns are assumed for the pores in the core. The displacement field is formulated based on Murakami’s zig-zag theory. The governing equations and boundary conditions are derived by applying Hamilton’s principle. An analytical solution is presented in the circumferential direction, and a numerical solution is conducted in the radial direction via the differential quadrature method (DQM). The effects of several parameters on the vibration characteristics are analyzed including angular velocity, porosity parameter, distribution patterns of the pores and CNTs, volume fraction of the CNTs, core-to-plate thickness ratio, geometric parameters of the plate, and the boundary conditions. The findings of this study are applicable to the design and optimization of high-performance rotating components in aerospace, mechanical, and energy sy
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