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| 題 名 | A Method of Analying Wave Propagation in a Periodic System with Asymmetric Periods=振動波分析法在非對稱週期性結構之應用 |
|---|---|
| 作 者 | 倪麥童; | 書刊名 | 筧橋學報 |
| 卷 期 | 7 2000.09[民89.09] |
| 頁 次 | 頁117-134 |
| 分類號 | 447.5 |
| 關鍵詞 | 振動波分析法; 非對稱週期性結構; |
| 語 文 | 英文(English) |
| 中文摘要 | 週期性與近週期性結構已經被廣泛地應用在航空與航海工業上,這兩型結構通常都遭受高頻率的振動。傳統的解析技巧來預估此特性的結構是很費周章的。因此有相當多的研究方法都是直接應用Bloch's理論(週期性理論)。本篇論文就是發展一研究方法來有效地模擬分析廣泛的週期性結構,這研究方法主要是結合了週期性理論分析程式和一有限單元法的套裝軟體(ANSYS)。應用本研究法來調查彎曲振動波在非對稱性週期樑,與相同題目的其他作者相比較顯示出非常精確的結果,同時也證明非對稱性週期結構在振動控制上的優點。 |
| 英文摘要 | Periodic and near-periodic structures are used widely in the aerospace and marine industries. In both cases, the structures are usually subject to high-frequency vibration. Predicting the dynamic characteristics of such structures can be extremely costly when using conventional analysis techniques. It is for this reason that a considerable amount of research has been directed toward methodologies based on Bloch's Theorem. This paper develops a methodology to model effectively general periodic structures. The approach adopted is to combine a periodic structure analysis program and a finite element package (ANSYS). The results from a study of flexural wave motion in a periodic beam with identical, but non-symmetric, periods agree well with the corresponding results obtained by other authors. It also shows that a period asymmetry can have a beneficial effect on the dynamic characteristics of the structure from a vibration control viewpoint. |
本系統中英文摘要資訊取自各篇刊載內容。