| 研究生: |
蒲一鋒 Pu, Yi-Feng |
|---|---|
| 論文名稱: |
複合圓錐層殼軸對稱問題之三維彈性力學解析 |
| 指導教授: |
吳致平
Wu, Chih-Ping |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 土木工程學系 Department of Civil Engineering |
| 論文出版年: | 2003 |
| 畢業學年度: | 91 |
| 語文別: | 中文 |
| 論文頁數: | 52 |
| 中文關鍵詞: | 複合層殼 、軸對稱 |
| 相關次數: | 點閱:63 下載:2 |
| 分享至: |
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本文根據三維彈性力學理論,藉由微擾法推導出複合圓錐層殼受軸對稱負載之三維漸近解析理論。
首先,將三維彈性力學基本方程式重新組合,以位移場及橫向應力為主要變數,消去曲面應力場量,將各場量做適當的無因次化處理,選定一微小參數,使用漸近展開法,將各場量展開成與其微小參數相關之冪級數形式,原三維控制方程式可分離成對應與該微小參數所對應之不同階數的控制方程式,由低階至階,循序將各方程式沿厚度方向積分,可導得具遞迴特性之控制方程式。各階的控制方程式皆須搭配合宜的邊界條件,藉由變分方法推衍出邊界條件之合力形式。此邊界值問題,配合廣義的微分近似法,可得各階場量。低階場量可為高階修正場量之變數求解依據,如此逐階循環修正終可求得收斂之精確解。
文中所推得複合圓錐層殼受軸對稱負載之三維漸近理論,討論兩端為簡支承受側向壓力與一端為固定端其自由端承受一扭矩作用下兩種不同軸對稱問題之數值範例,其結果與文獻中標準驗證問題之精確解印証,不論在收斂性及精度上均顯示合理。
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