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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/10530完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 劉佩玲 | |
| dc.contributor.author | Shao-Yu Hung | en |
| dc.contributor.author | 洪邵宇 | zh_TW |
| dc.date.accessioned | 2021-05-20T21:36:53Z | - |
| dc.date.available | 2015-08-18 | |
| dc.date.available | 2021-05-20T21:36:53Z | - |
| dc.date.copyright | 2010-08-18 | |
| dc.date.issued | 2010 | |
| dc.date.submitted | 2010-08-16 | |
| dc.identifier.citation | 1. Carino, N. J., Sansalone, M., and Hsu, N. N., 1986, “Flaw Detection in Concrete by Frequency Spectrum Analysis of Impact-Echo Waveforms”,International Advances in Nondestructive Testing, 12thEdition, Gordon & Breach Science Publishers, New York, pp.117-146.
2. 許有智，1995，'以敲擊回音法檢測鋼腱套管之灌漿品質 '，碩士論文，國立中興大學土木工程研究所 3. Jaeger,B., and Sansalone, M., 1996, “Detecting Voids in Grouted Tendon Ducts of Post-Tensioned Concrete Structures Using the Impact-Echo Method”,ACI Structural Journal, Volume 90,no. 5, pp 462-473. 4. Cheng, C. C., and Sansalone, M., 1993, “Effect on Impact-Echo Signals Caused by Steel Reinforcing Bars and Voids around Bars”, ACI Materials Journal, Volume 90,no. 5, pp 421-434. 5. http://ndt.ce.cyut.edu.tw/ndt/IE0.pdf 6. Martin, J.; Hardy, M. S. A.; Usmani, A. S.; and Forde, M. C., “Impact Echo Assessment of Post-Tensioned Concrete Bridge Beams,” Proceedings of the 7th International Conference on Structure Fault and Repair, M. C. Forde,ed., Engineering Technics Press, Edinburgh, UK, 1997, pp.341-353. 7. Yajai Tinkey, Ph.D. ; Larly D. Olson, P.E.; Olson Engineering, Inc. “Non-destructive Evaluation Method for Determination of Internal Grout Conditions inside Bridge Post-tensioning Ducts using Rolling Stress Vy'aves for Continuous Scanning”, Washington,D.C.,2006. 8. Abraham O., “Thickness frequency profile for the detection of voids in tendon duct”, ACI Structural Journal, 99(3), pp239-247, 2002a. 9. Abraham O.,” Comments on void depth detection in tendon duct with the impact echo method based on finite element computations,” NDT-CE,2003 10. Huang, N. E., Shen, Z., Long, S. R., Wu, M. C., Shih, S. H., Zheng, Q., Tung, C. C., and Liu, H. H., 1998, “The Empirical Mode Decomposition and the Hilbert Spectrum for Nonlinear and Nonstationary Time Series Analysis”, Proceedings of the Royal Society A, vol. 454, no. 1971/March 08, pp. 903-995. 11. Loh, C. H., Wu, T. C., and Huang, N. E., 2001, “Application of the Empirical Mode Decomposition-Hilbert Spectrum Method to Identify Near-Fault Ground-Motion Characteristics and Structural Respon124 ses”, Bulletin of the Seismological Society of America, Volume 91, no. 5, pp. 1339-1357. 12. Li, Y. F., Chang, S. Y., Tzeng, W. C., and Huang, K., 2003, “The Pseudo Dynamic Test of RC Bridge Columns Analyzed Through The Hilbert-Huang Transform”, Journal of Mechanics, Volume 19, Issue 3, Pages 373-387. 13. Douka, E., and Hadjileontiadis, L. J., 2005, “Time-Frequency Analysis of the Free Vibration Response of a Beam with a Breathing Crack”, NDT & E International, Volume 38, no. 1, pp. 3-10. 14. Chia-Ching Lin, Pei-Ling Liu , Po-Liang Yeh, 2009, “Application of empirical mode decomposition in the impact-echo test,” NDT & E International, Volume 42, Issue7, pp. 589-598. 15. 郭建成，2007，'經驗模態分解法應用於裂縫與鋼筋之辨識 '，碩士論文， 國立台灣大學應用力學研究所 16. Carino, N. J., Sansalone, M., and Hsu, N. N., 1986, “Flaw Detection in Concrete by Frequency Spectrum Analysis of Impact-Echo Waveforms”, International Advances in Nondestructive Testing, 12th Edition, Gordon & Breach Science Publishers, New York, pp. 117-146. 17. Colla, C., and Lausch, R., 2003, “Influence of Source Frequency on Impact-Echo Data Quality for Testing Concrete Structures”, NDT & E International, Volume 36, no. 4, pp. 203-213. 18. 孫嘉宏，1997，”以暫態彈性波量測鋼筋混凝土波速之研究”碩士論文 19. T Lokajicek , K Klima ;2006 “A first arrival identification system of acoustic emission(AE)signals by means of a high-order statistics approach,” Meas. Sci. Technol. 17 pp.2461-2466 20. Cooley and Turkey(1965), ” An Algorithm for Machine Calculation of Complex Gourier Series”, Math. Comput. , Vol.19, pp297~301. 21. Simpson W.A. (1974),” Time-frequency-domain Formulation of Ultra- sonic Frequency Analysis”, J. Acoust. Soc. Am., Vol.56, No.6, pp1776~1781. 22. Cohen, L., 1995, Time-Frequency Analysis, New Jersey, Prentice Hall. 23. 童建樺，2001，”彈性波混凝土品質檢測系統之研製與應用”，博士論文 24. Schwartz, M., Bennett, W. R., and Stein, S., 1966, Communications Systems and Techniques, New York, McGraw-Hill. 25. Rice, S. O., 1944a, “Mathematical Analysis of Random Noise”, Bell System Technical Journal, no. 23, pp. 282-310. 26. Bedrosian, E., 1963, “A Product Theorem for Hilbert Transforms”, Proceedings of the IEEE, Volume 51, no. 5, pp. 868-869. 27. Huang, N. E., Shen, Z., Long, S. R., Wu, M. C., Shih, S. H., Zheng, Q., Tung, C. C., and Liu, H. H., 1998, “The Empirical Mode Decomposition and the Hilbert Spectrum for Nonlinear and Nonstationary Time Series Analysis”, Proceedings of the Royal Society A, vol. 454, no. 1971/March 08, pp. 903-995. 28. 葉柏涼，2006，'敲擊回音法之時間－頻率域分析與影像法 '，博士論文， 國立台灣大學應用力學研究所 29. Lin, Y., Sansalone, M., and Carino, N. J., 1990, “Finite Element Studies of the Transient Response of Plates Containing Thin Layers and Voids“, Journal of Nondestructive Evaluation, Volume 9, no. 1, pp. 27-47. 30. Supratic Gupta, Yoshito Itoh & Jun-ichro Niwa, (1994) “An Object-Oriented Diagnostic Systemfor Pre-stressed Concrete Bridges”,Department of Civil Engineering, Nagoya University, Microcomputers in Civil Engineering. Publish by Blackwell Publishers. USA. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/10530 | - |
| dc.description.abstract | 本研究主旨在於利用一個有效的訊號處理方法，以檢測隱藏於敲擊回音訊號中的微弱訊號，或複雜的幾何情況造成回傳的應力波互相干擾，以期提升敲擊回音法的極限，有效提升工程品質。
黃鍔院士所提出的訊號處理方法是利用經驗模態分解法將原訊號內的各本質模態函數析出，林佳慶[14]率先利用此法將敲擊回音訊號進行經驗模態分解，再對本質模態函數進行快速傅立葉轉換，結果顯示，此法能得到更清楚且具物理意義的頻譜。 本研究先以有限元素軟體模擬四種狀況的孔洞，分別為1. 孔洞直徑4cm，8cm，12cm，保護層深度皆為6cm。2. 孔洞直徑6cm，保護層深度分別為12cm、18cm、24cm。3. 兩孔洞間距小。4. 孔洞上方有鋼筋干擾。最後進行模型試驗。經由數值算例和模型試驗分析比較，此法確實有效的提取出隱藏於敲擊回音內微弱及複雜的訊號，或是互相干擾的應力波。而且由回音訊號的傅立葉頻譜發現，孔洞的回音訊號大都具有數個大小相似的尖峰群。 配合短時傅利葉轉換，可觀察各本質模態函數的時頻分布，即可判斷出各本質模態函數所代表的物理意義。其中表面波能量消散最快；內部缺陷回音訊號能量消散次之；模態振動能量最大，消散最慢。 | zh_TW |
| dc.description.provenance | Made available in DSpace on 2021-05-20T21:36:53Z (GMT). No. of bitstreams: 1 ntu-99-R97543049-1.pdf: 3336983 bytes, checksum: 461bfc55467b63a1ea0d1a7d98a944ff (MD5) Previous issue date: 2010 | en |
| dc.description.tableofcontents | 致謝 I
摘要 III 目錄 V 圖目錄 VII 表目錄 X 第一章. 前言 1 1.1 研究動機 1 1.2 文獻回顧 2 1.3 研究方法 3 第二章. 敲擊回音法 5 2.1 應力波傳行為 5 2.2 敲擊回音法 6 2.3 敲擊回音試驗參數 8 2.3.1 敲擊源 8 2.3.2 總取樣時間 10 2.3.3 取樣時距 11 2.4 波速量測 11 2.5 敲擊回音法算例 12 第三章. 訊號處理方法 18 3.1 傅立葉轉換 18 3.2 短時傅立葉轉換 19 3.3 經驗模態分解 19 3.3.1 本質模態函數 20 3.3.2 經驗模態分解 22 第四章. 數值模型 30 4.1 有限元素分析軟體簡介 30 4.2 有限元素分析步驟 31 4.2.1 幾何模型建立 31 4.2.2 網格畫分 31 4.2.3 元素定義 32 4.2.4 負載與束制 32 4.2.5 求解 33 4.2.6 結果分析 33 4.3 數值模型訊號分析 34 4.3.1 數值算例一 34 4.3.2 數值算例二 37 4.3.3 數值算例三 39 4.3.4 數值算例四 41 4.4 小結 42 第五章. 模型試驗 67 5.1 實驗設備 67 5.2 實驗參數 67 5.3 模型實驗訊號分析 68 5.3.1 模型試驗一 68 5.3.2 模型試驗二 70 5.3.3 模型試驗三 74 5.4 小結 76 第六章. 結論與展望 102 參考文獻 104 | |
| dc.language.iso | zh-TW | |
| dc.title | 微弱及複雜敲擊回音之分析 | zh_TW |
| dc.title | Analysis of Weak and Complex Impact-Echo Signal | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 98-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 童建樺,蔡崇道 | |
| dc.subject.keyword | 敲擊回音,經驗模態分解,本質模態函數,非破壞檢測, | zh_TW |
| dc.subject.keyword | impact-echo,EMD,IMF,NDT, | en |
| dc.relation.page | 106 | |
| dc.rights.note | 同意授權(全球公開) | |
| dc.date.accepted | 2010-08-16 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 應用力學研究所 | zh_TW |
| 顯示於系所單位： | 應用力學研究所 | |
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| ntu-99-1.pdf | 3.26 MB | Adobe PDF | 檢視/開啟 |
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