区分モード合成法を用いた階層的最適設計手法の開発 : 固有振動数指定問題への適用

概要

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In this paper, a new hierarchical optimization method for structures is presented. The special features of this method are that the sensitivities of the design object are obtained using the eigenvalues of substructures as design variables, and the sensitive substructures are only modified to satisfy the design object. In this study, the present method is applied to the natural frequency assignment problem. The procedures of design are as follows. First, the sensitivities of eigenvalues of the overall structure to the eigenvalues of substructures are calculated. Second, the most sensitive substructures are selected. Third, the dynamic characteristics of sensitive substructures are modified to satisfy the design object. Finally, the eigenvalues of the overall structure are calculated. The present method is applied to a natural frequency assignment problem of a gate structure. The results of the present method and the conventional method are compared in terms of the accuracy and calculating time, and show that the present method is effective in practical examples.
一般社団法人日本機械学会の論文
1994-07-25