1107 フラクタル分枝限定法による複合材料翼遷音速フラッタ動圧向上の積層構成最適設計(OS20(I) 積層材の設計における最適化)

概要

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This paper examines stacking-sequence optimization design for improving the transonic flutter limit To reduce the required computational cost, application of the Fractal Branch and Bound Method is attempted This method is proposed by the authors for the stacking-sequences optimization of laminated composites in order to maximize the buckling load, and it demands approximation of a design space with a response surface comprising quadratic polynomials for pruning branches of stacking sequences. To approximate with appropriate accuracy the discontinuities of the design space of transonic flutter due to flutter mechanism change between the classical flutter and the Limit Cycle Oscillation, a combinatorial approximation method using the modified response surface method is proposed The applicability of the proposed stacking-sequence optimization procedure using the Fractal Branch and Bound Method is demonstrated by applying it to the stacking-sequence optimization design of an AGARD 445.6 standard wing. The results indicated that the method was applied successfully and that therefore a practical optimal stacking sequence could be obtained with significantly low computational cost
一般社団法人日本機械学会の論文
2005-08-02