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標題: 在模態空間內有重複艾根植的最佳化結構設計
作者: 陳定宇
關鍵字: 艾根植;空間;重複;設計;最佳化;結構;模態
出版社: 國立中興大學工學院;Airiti Press Inc.
Project: 興大工程學報, Volume 2, Page(s) 41-49.
The problem of structural optimization subjected to natural frequency constraints hasbeen solved by various methods. The existence of repeated eigenvalues in some structureas well as the calculation of the eigenvalue sensitivities for these repeated modes were derived previously. Concerning heavy computing burden in structural optimization, the authorsuggests a method which combines and transforms some previous research outcomes into areduced modal space to perform the calculations of eigenvalue sensitivities and the reanalysis of the modified eigensystem. Since the dimension of the system is drastically reducedin modal space, the advantage of having improved effciency is apparent. Furthermore, therepeated eigenvalues sometimes no longer exist in the modal space. The computation ofsensitivity data thus becomes easier. Two numerical examples show good results for thisproposed approach.

ISSN: 1017-4397
Appears in Collections:第02卷

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