Stacking Sequence Optimizations for Maximizing PanelFlutter Speed

摘要

Fractal branch and bound method has developed by authors for optimization of stacking sequencesrnto maximize buckling load of composite structures. The method demands an approximation of arndesign space with a response surface comprising quadratic polynomials for pruning fractal branchesrnof stacking sequences. The approximation of the objective function with quadratic polynomials hasrnbeen confirmed for the buckling load maximizations using lamination parameters as predictors.rnAlthough maximizations of flutter limits of composite panels for supersonic flow has already shownrnby several researchers, it is not clarified that the design space of the supersonic flutter limit can bernapproximated with quadratic polynomials. In the present study, the approximations using quadraticrnpolynomials with lamination parameters as predictors are performed to investigate the effectivenessrnof the method for the supersonic panel flutter of composite laminates. As a result, the method isrnsuccessfully applied, and the practical optimal stacking sequence is obtained using modified responsernsurfaces.