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題 名 | Numerical Solution of Buckling and Vibration in Laminates with Arbitrary Shape Cut off Regions=具有任意形狀切塊區域之層疊板的挫屈與振動問題之數值解 |
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作 者 | 洪志強; 廖惠雯; 黃明鋒; 簡國璋; | 書刊名 | 修平學報 |
卷 期 | 8 2004.03[民93.03] |
頁 次 | 頁165-190 |
分類號 | 440.21 |
關鍵詞 | 任意形狀; 切塊區域; 單純整體挫屈; 減少勁度; Pure global buckling; Cut off region; Reduced stiffness; Arbitrary shape; |
語 文 | 英文(English) |
中文摘要 | 非等向性長方形層疊板具有對稱於厚度中間面的任意形狀之切塊區域,分別在四邊簡支和固定支邊界條件下,將切塊區域所剩下的部分視為一具有減少勁度之均勻板,來做單純整體挫屈與振動的研究。板勁度的變化以溥立葉級數來表示。我們以理茲(Ritz)的能量原理方法來求層疊板被切任意形狀之切塊後在受軸向壓縮力作用下的電腦數值計算解。在圓形和橢圓形切塊區域的減少勁度之數值解已經得到。我們發現單純整體挫屈負載隨著切塊區域增加而減少,基本頻率也隨著切塊區域增加而減少。 |
英文摘要 | The pure global buckling and vibration of four sides simply-supported as well as clamped anisotropic laminates having an arbitrary shape cut off region that is symmetric with respect to mid-plane have been studied by treating the remaining cut off regions as uniform plates with reduced stiffness. The variation of stiffness of the plate is represented by Fourier series. Computational solutions of the energy principle for the Ritz method in a plate having arbitrary shape of typical cut off regions under biaxial compressive loads are obtained. Some numerical results for the pure global buckling load prediction due to its reduced flexural stiffness for the circular cut off regions and elliptical cut off regions are presented. We find the normalized pure global buckling load ratio decreases as the cut off regions size increases, and the nondimensional fundamental frequency value decreases as the cut off regions size increase. |
本系統中英文摘要資訊取自各篇刊載內容。