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題 名 | 擺錘運動及靜態結構穩定之混沌現象 |
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作 者 | 吳傳威; | 書刊名 | 力學 |
卷 期 | 10:2 1994.06[民83.06] |
頁 次 | 頁161-168 |
分類號 | 440.13 |
關鍵詞 | 混沌現象; 靜態混沌; 結構穩定; Deterministic chaos; Statical chaos; Structural stability; |
語 文 | 中文(Chinese) |
中文摘要 | 目前在力學方面討論混沌現象之文獻絕大多數為與時間相關之動態問題,甚少有 人聯想到靜態方面的問題上。本文在提示混沌現象之辨識法則之後,以已知具混沌行為的動 態問題為基礎,探討靜態邊界值問題產生混沌的可能形態。結果發現受迫振動擺錘在動態軌 跡同交點附近發生混沌現象之情況同樣可在具先天不完美之靜態挫屈結構上以不規則之獨立 環變形形態展現,觀念上可視為一種近似空間混沌。最後則探討對不完美極為敏感之圓柱薄 殼局部挫屈的問題與空間混沌之可能關聯。 |
英文摘要 | In the context of deterministic chaos in mechanical problems, majority of the works are concerning time dependent dynamical problems, very few if any investigate statical ones. In the present paper, criteria for identifying chaotic behavior of mechanical systems are first given, and then on the basis of a well known dynamical problem, the forced pendulum, the possibility of chaos in statical problems is discussed. It is found that in the vicinity of homoclinic point, buckled elastic structural systems can be perturbed to produce soliton-like deformed shapes, namely asymtotic spacial chaos. Finally, the cylindrical shells, known as senstive to initial imperfection is remarked. |
本系統中英文摘要資訊取自各篇刊載內容。