2108 ロバスト性を考慮した積層円筒殻の座屈最適化(OS09-1/ロバスト設計)(OS09/ロバスト設計・信頼性設計)

抄録

This paper studies the structural optimization with robustness for buckling of FRP laminated circular cylindrical shells. For this purpose, the buckling equation under axial compression is derived based on the classical lamination theory, and a multi-objective optimization problem is defined by taking a critical buckling load and a sensitivity of the buckling load as objective functions, and the bucking load and the sensitivity would be maximized and minimized simultaneously, respectively, by optimizing the fiber angle of the shell. In optimization, a multi object genetic algorithms are employed to solve the optimization problem. In numerical calculations, the pareto optimal solutions are obtained for the present problem, and the applicability of the GA employed here is also studied from numerical results obtained.