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研究生:宋泊錡
研究生(外文):Po-Chi Sung
論文名稱:光彈參數互相影響問題之排除與修正
論文名稱(外文):Elimination and correction of the interactions between the photoelasticity parameters
指導教授:黃敏睿
指導教授(外文):Min-Jui Huang
學位類別:碩士
校院名稱:國立中興大學
系所名稱:機械工程學系所
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:2009
畢業學年度:97
語文別:中文
論文頁數:88
中文關鍵詞:光彈模糊等傾角區域相位展開
外文關鍵詞:PhotoelasticityAmbiguityIsoclinicRegionPhase unwrapping
相關次數:
  • 被引用被引用:1
  • 點閱點閱:117
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  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
光彈之所以能夠取得全場應力資訊歸因於其等色參數以及等傾角參數,然而在相移法中其存在著此兩參數的互相影響問題,其會導致兩參數存在著不可定義區域以及模糊區域,本文除了利用平偏四步結合多波長法以及圓偏六步來修正此兩參數中不可定義區域外,也發展了一個演算法來解決模糊區域,此演算法主要是利用影像處理方式對等傾角參數作相位展開,其處理過程包含端點相連以及區域劃分,實驗中即使當試件包含等力點時其仍能得到正確的結果和良好的處理時間,也驗證了本文所使用的架構與理論的可行性。
The reason that we can conveniently obtain the full-field stress information from photoelasticity is due to it provides two parameters, isochromatic and isoclinic, by the polariscope. However, the phase-stepping method will produce the isoclinic-isochromatic interactions that is undefined region and ambiguity(ambiguous region) on the phase maps of photoelasticity. So, the paper presents a method to eliminate and correct the undefined region and ambiguity by the polariscope configuration and phase unwrapping algorithm, respectively. The former, the configuration is based on the four-step plane polariscope with white light and six-step circular polariscope with monochromatic light, and the latter, the algorithm is a phase unwrapping technique that is based on image processes involved in connecting points and region split for the isoclinic parameter. The correct experimental result and fine process time confirmed the availability and benefit of the configuration and algorithm proposed in the paper.
致謝.............................................. i
摘要............................................. ii
Abstract........................................ iii
目錄............................................. iv
圖目錄........................................... vi
表目錄............................................ x
第一章 緒論....................................... 1
1-1 研究背景與目的................................ 1
1-2 相關文獻與發展................................ 2
1-3 研究動機...................................... 5
1.4 論文大綱...................................... 5
第二章 光彈原理................................... 7
2-1 偏極光(polarized light)....................... 7
2-2 雙折射性材料(birefringence material) ......... 7
2-3 光-應力定律(stress-optic law)[1].............. 8
2-4 常見之偏光儀種類............................. 10
2-5 Jones calculus............................... 12
2-6 ANSYS模擬.................................... 16
第三章 利用相移法分離主應力角與相對延遲量........ 26
3-1 相移法面臨的問題............................. 26
3-2 解決與改善之方法............................. 29
第四章 主應力角展開的理論與演算法................ 35
4-1 理論......................................... 35
4-2 演算法....................................... 40
第五章 實驗設備與展開結果........................ 45
5-1 實驗設備..................................... 45
5-2 展開結果..................................... 46
5.2.1 圓環....................................... 46
5.2.2 圓盤....................................... 59
5.2.3 彎板....................................... 70
5-3 討論......................................... 71
第六章 結論...................................... 81
參考文獻......................................... 82
附錄一 符號命名表................................ 85
個人資料......................................... 88
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