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研究生:簡民原
研究生(外文):Min-Yuan Chien
論文名稱:應用電子斑點干涉術探討含裂紋圓板之振動特性
論文名稱(外文):Vibration Analysis for the Circular plates with Cracks by using the Amplitude Fluctuation ESPI Method
指導教授:黃吉宏黃吉宏引用關係
指導教授(外文):Chi-Hung Huang
學位類別:碩士
校院名稱:清雲科技大學
系所名稱:機械工程研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2006
畢業學年度:94
語文別:中文
論文頁數:91
中文關鍵詞:裂紋圓板振動電子斑點干涉術
外文關鍵詞:crackcircular platevibrationESPI
相關次數:
  • 被引用被引用:2
  • 點閱點閱:216
  • 評分評分:
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
關於等向性材料圓板之振動行為量測,一般皆是使用頻譜分析的方式,雖然可以獲得圓板結構的共振頻率,但是對於振型變化卻不易得知。因此本篇論文利用電子斑點干涉(ESPI) 可提供全域性、即時性及非接觸式的光學量測方式,且配合數位化之影像擷取系統,便可迅速而正確地獲得模態共振之振動頻率及清晰之模態干涉圖形。

在本文中首先對振幅變動法電子斑點干涉術 (AF-ESPI) 進行基本之理論推導,並使用影像累加之後處理方式,如此可大幅改善並提升影像對比及亮度之效果。其次針對完整圓板及含裂紋圓板進行實驗量測與有限元素法 (FEM) 分析作比較,並且從事其振動特性之探討。在完整圓板方面,主要討論圓板結構共振行為之影響;在含裂紋圓板方面,藉由裂紋長度與裂紋位置改變之方式,探討二者對振頻及振型所造成之影響。
The vibration characteristics of isotropic circular plates are usually determined experimentally by the spectrum analysis. Although the resonant frequencies can be obtained, the mode shapes are difficult to be detected. In this dissertation, electronic speckle pattern interferometry (ESPI) technique with full-field, real-time, and non-contact advantages is applied to measure the resonant frequencies and mode shapes at the same time, incorporated with the digital image-grabbing system.

At first, we derive the theory basis of AF-ESPI technique, and then use the image superposition to reduce the speckle noise and enhance the contrast of image. By employing the AF-ESPI measurement, the transverse vibration modes are investigated for the isotropic circular plates with cracks. Both of the experimental results and finite element method (FEM) calculations are presented in this dissertation. Finally, the influences of crack length and location are also investigated for the circular plates with cracks.
中文摘要 i
英文摘要 ii
誌 謝 iii
表 目 錄 vi
圖 目 錄 vii
第一章 緒論 1
1.1 研究動機 1
1.2 文獻回顧 2
1.3 內容簡介 4
第二章 ESPI的理論推導與實驗架設 6
2.1 面外振動的量測 6
2.1.1 光學架設 6
2.1.2 理論推導 7
2.2 實驗結果之影像後處理 13
2.3 實驗設備與分析 14
第三章 含徑向裂紋圓板之振動特性分析 17
3.1 完整圓板振動特性分析 17
3.1.1 試片規格 17
3.1.2 有限元素數值分析 18
3.1.3 完整圓板之結果分析與討論 18
3.2 含徑向裂紋圓板之振動特性分析 20
3.2.1 試片規格 20
3.2.2 有限元素數值分析 21
3.2.3含徑向裂紋圓板之結果分析與討論 21

第四章 含環向裂紋圓板之振動特性分析 23
4.1 含環向裂紋圓板試片規格 23
4.2 有限元素數值分析 24
4.3 含環向裂紋圓板之結果分析與討論 24
第五章 結論 26
5.1 本文主要成果 26
5.2 尚待努力方向 27
參考文獻 28
附表 32
附圖 44
簡 歷 91
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