2213 分岐成長網による補強リブ形態創成法 : 振動数最大化問題への適用(OS11-2/構造,制御,熱問題の最適化)(OS11/設計と最適化)

抄録

Stiffener layout patterns are studied in this paper to acquire the maximal natural frequency for a plate by applying a growing and branching rule just like tree branch model. The stiffener starts from seeds, positions of which are specified in advance, and grows in the direction depending on the sensitivity of natural frequency with respect to the cross sectional area of the stiffener. The update increase of cross sectional area is proportional to the sensitivity value. When the cross sectional area reaches a specified threshold value, the stiffener will branch off or degenerate. Simulation of some numerical examples are implemented to prove the validity and effectiveness of the proposal method, and optimal patterns of stiffener layout for some kinds of support conditions are demonstrated.