Buckling Analysis and Optimization Design of Composite Cylindrical Shells
LIU Tao, XU Qi-nan, PEI Jun-hou(China Ship Scientific Research Center, Wuxi 214082,China)
The linear and geometric nonlinear buckling load including transverse shear deformation are calculated by Timoshenko first-order shear deformation theory and Reddy higher-order shear deformation theory respectively.The effects of lamination angle,number of layers and radius-to-thickness ratio on the buckling pressure are analyzed. The combination of a Random-Search approach and the flexible-tolerance method is employed to search for the optimization lamination angles. The Mixed-discrete-optimization program is used to solve the optimization problem in which the lamination angles are assumed to have discrete values. The experiments of the carbon-epoxy cylindrical shell models show that the results presented in this paper are reliable.