抄録
In this paper the vibration characteristics of rectangular, symmetric composite sandwich plates and the layup optimization of their laminated FRP composite faces are examined. The honeycomb core is modeled as a thick plate whose transverse shear deformation is taken into consideration based on a higher-order shear deformation theory, and the top and bottom FRP faces are modeled as a very thin sheet. A two-dimensional finite element method is developed using an eight-node isoparametric element. First, the fundamental frequency of the composite sandwich plate is discussed in the subspace of four in-plane lamination parameters of the FRP face. Next, the layup optimization of the FRP face for maximizing the fundamental frequency of the composite sandwich plate is performed by a nonlinear mathematical programming method, and the optimum laminate configuration of the FRP face is determined.
