| 研究生: |
林啟裕 Lin, Chi-Yue |
|---|---|
| 論文名稱: |
加肋平板附帶集中質量及集中線性彈簧之自由振動分析 |
| 指導教授: |
吳重雄
Wu, Jong-Shyong |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 造船及船舶機械工程學系 Department of Systems and Naval Mechatronic Engineering |
| 論文出版年: | 2003 |
| 畢業學年度: | 91 |
| 語文別: | 中文 |
| 論文頁數: | 77 |
| 中文關鍵詞: | 加肋平板 、附加質量 、附加彈簧 、有限元素法 、自由振動 、加勁材 |
| 外文關鍵詞: | stiffened plate, added mass, added spring, free vibration, stiffener, finite element method |
| 相關次數: | 點閱:165 下載:2 |
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本文之主旨在於利用有限元素法(FEM)來進行附帶任意數目、任意大小及任意位置之集中質量與線性彈簧之加肋平板(stiffened plate)的自由振動分析。首先,吾人使用一些三維的長方形平板元素來模擬整塊無肋平板,並進行整塊無肋平板的自由振動分析,以驗證整個電算程式中,屬於無肋平板振動分析部分之副程式的可靠性。接著則以一些三維的樑元素來模擬各根加勁材,並將這些樑元素的性質矩陣透過座標轉換與矩陣組合的技巧,合併到整塊無肋平板的性質矩陣上。為驗證此一矩陣組合過程的可靠性,吾人假設加勁材之撓曲剛度(flexural rigidity)很大,而無肋平板之尺寸既薄又長,故兩者被焊接在一起而成為加肋平板後,此一加肋平板的部分自然頻率與振態,必然與單獨的加勁材之自然頻率與振態相接近。在有加肋與無加肋平板之電算副程式均驗證無誤後,吾人乃開始探討加肋平板附帶集中質量及線性彈簧時,其動態特性所受到的影響。
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