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論文中文名稱:刀尖缺陷寬度對楔形體導波傳播行為之研究 [以論文名稱查詢館藏系統]
論文英文名稱:Influence of Notch Width on the Propagation Behaviors of Wedge Waves [以論文名稱查詢館藏系統]
院校名稱:臺北科技大學
學院名稱:機電學院
系所名稱:製造科技研究所
畢業學年度:107
畢業學期:第一學期
出版年度:107
中文姓名:李承儒
英文姓名:Cheng-Ju Lee
研究生學號:104568505
學位類別:碩士
語文別:中文
口試日期:2018/11/09
論文頁數:76
指導教授中文名:楊哲化
口試委員中文名:陳清祺;尹慶中;楊哲化
中文關鍵詞:非破壞檢測楔形體導波雷射超音波量測技術
英文關鍵詞:Nondestructive testingWedge WaveLaser Ultrasonic measurement technology
論文中文摘要:在製造工藝技術中,刀具損耗是造成被加工物件尺寸異常的因素之一,因此如何降低此一加工異常因素,便成為業界重要課題之一,目前業界皆普遍透過刀具狀態監測(Tool Condition Monitoring, TCM)來監控刀具的損耗狀況,例如工業電視攝像法(Industrial Television, ITV)、間接量測法(Indirect Method of Measurement, IMM),但因電視攝像法無法應用於過度深入被加工件的刀具,而間接量測法則必須使感測器與待測物以物理接觸方式監測,故上述兩種方法仍有改善空間存在,因此本研究將探討雷射超音波量測技術應用於刀具狀態監測,而在此將對於楔形體導波應用於檢測楔形體樣式刀具進行研究探討。
在文獻當中記載,楔形體導波(Wedge Wave, WW)是一種發生於楔形體尖端,具有一個波傳範圍內的傳遞導波(guided wave),其具有振幅明顯且不易衰弱的特性,在先前研究當中發現,當楔形體導波傳遞於具有不同深度但固定寬度的缺陷條件之刀具刃尖,其反射率與穿透率會因為不同深度而有所變化,因此若能將傳遞於楔形體尖端的導波波傳行為進行完整分析研究,方能探討如何應用於楔形體樣式刀具的狀態監測。
本研究透過模擬分析及實驗量測,使楔形體導波傳遞於具缺陷的刀具刃尖,觀察固定深度但不同寬度的缺陷條件之波傳行為,在結果發現,當缺陷寬度達到波長的50%及100%時,其穿透率達到相對最大值,而當缺陷寬度達到波長的75%及125%時,其穿透率則達到相對最小值,而反射率也有相同的數據變化,因此發現當楔形體導波穿越刀具缺陷時,楔形體導波不因缺陷寬度的變化而造成明顯衰退,然而缺陷深度的變化則會明顯反應於反射波與穿透波,於此,藉由上述研究結果的發現,在楔形體樣式刀具的刀具狀態監測下,楔形體導波受到缺陷深度變化的影響大於缺陷寬度變化。
論文英文摘要:While manufacturing, the defect of the knife tool will cause the error dimension of the products and how to reduce this issue is the one of the possible in business. They are using “Tool Condition Monitoring, TCM” to control the condition of those tools, such as “Industrial Television, ITV”, “Indirect Method of Measurement, IMM”, but ITV cannot be used in the much deeper object, and IMM has to be let the sensor in contact with the object by physical contact, so they still have to improve that, and that’s why we study the Wedge Wave applied to wedge type of knife tool in Laser Ultrasonic measurement technology for TCM.
According to the literature, Wedge Wave is happening on the tip of the wedge type, it is a kind of the guided wave with a wave range. The characteristic is having an obvious amplitude and not easy to weaken. When Wedge Wave passed different types of depth and consistent width, the reflection and transmittance will be changing. So, if we major the Wedge Wave in a fully complete analysis and we can figure out how to apply in TCM.
According to the analysis and measurement, we make Wedge Wave passed the wedge tool with the consistent depth and different width defect, and we found that while when the width is achieved 50% and 100% of wavelength, the transmittance will get the maximum value, and when it became 75% and 125%, the transmittance will get the minimum value. This condition is the same as the reflection. So, we know that Wedge Wave will not get the weak cause by the width defect changed, but the depth defect changed will influence the reflection and transmittance. Finally, according to this study, we know that Wedge Wave has much more influence of depth defects than width defects.
論文目次:中文摘要...............................i
英文摘要.............................iii
誌謝...................................v
目錄..................................vi
表目錄..............................viii
圖目錄................................ix
第一章 緒論..........................1
1.1研究動機...........................1
1.2研究背景...........................2
1.3研究目的...........................5
第二章 模擬分析......................8
2.1Abaqus分析軟體操作流程..............8
2.1.1模型建立.........................9
2.1.2材料屬性設定.....................12
2.1.3邊界條件設定.....................13
2.1.4節點規劃與網格劃分...............15
2.1.5模擬分析與輸出...................17
第三章 實驗量測.....................19
3.1實驗設備..........................19
3.1.1試片準備........................19
3.1.2雷射超音波激發系統...............23
3.1.3雷射超音波接收系統...............24
3.2實驗架設..........................25
第四章 研究結果與討論...............29
4.1模擬分析結果......................29
4.1.1參考文獻模擬結果................29
4.1.2研究模擬結果....................42
4.1.3研究實驗量測結果................60
4.1.4綜合比較與分析..................66
4.1.4.1模擬分析比對結果..............67
4.1.4.2實驗量測比對結果..............68
4.1.4.3綜合比較分析..................70
4.1.4.4參考文獻佐證..................70
4.1.4.5缺陷形狀對於楔形體導波的影響...73
第五章 結論與後續發展...............74
5.1結論.............................74
5.2後續發展.........................74
參考文獻............................75
論文參考文獻:1.P. E. Lagasse, I. M. Mason and E. A. Ash, “Acoustic surface waveguides-Analysis and assessment,” IEEE Transactions on Microwave Theory and Techniques, vol. MTT-21, no. 4, 1973.
2.J. McKenna and G. D. Boyd, “Plate theory solution for guided flexural acoustic waves along the tip of a wedge,” IEEE Transactions on Sonics ans Ultrasonics, vol. Su-21, no.3, 1974, pp. 178-186.
3.V. V. Krylov, “Conditions for validity of the geometrical-acoustics approximation in application to waves in an acute-angle solid wedge,” Soviet Physics–Acoustics, vol. 35, no. 2, 1989, pp. 176-180.
4.J. R. Chamuel, “Edge waves along immersed elastic elliptical wedge with range dependent apex angle,” IEEE Ultrasonics Symposium, 1993, pp. 313-318.
5.J. R. Chamuel, “Flexural edge waves along free and immersed elastic wave guides,” In Review of Progress in Quantitative Nondestructive Evaluation, Proc. 16th Symp. Quantitative Nondestructive Evaluation, Brunswick, Maine, 1997.
6.毛俊景,楔形體導波在刀具磨耗檢測之應用,碩士論文,長庚大學機械工程研究所,桃園,2004。
7.曾俊仁,雙線性頂角之楔形體的彈性波傳行為研究,碩士論文,長庚大學機械工程研究所,桃園,2004。
8.湯盛瑋,表面鍍膜對楔形體表面波傳行為的影響,碩士論文,長庚大學機械工程研究所,桃園,2005。
9.王文志,壓電楔形體在流體負載下之波傳行為量測,碩士論文,長庚大學機械工程研究所,桃園,2006。
10.許家豪,利用楔形體導波於刀具磨耗之研究,碩士論文,長庚大學機械工程研究所,桃園,2006。
11.L. J. Crane, M. D. Gilchrist, and J. J. H. Miller, “Analysis of Rayleigh-Lamb wave scattering by a crack in a elastic plate,” Computational Mechanics, vol. 19, 1997, pp. 533-537.
12.X. L. Zhao, and Joseph L. Rose, “Boundary element modeling for defect characterization potential in a wave guide,” International Journal of Solids and Structures, vol. 40, 2003, pp. 2645-2658.
13.V. V. Krylov, and I. V. Raguzina, “Scattering of acoustic wedge modes,” Soviet Physics–Acoustics, vol. 34, no. 5, 1988.
14.陳語鋐,具缺陷之楔形體導波波傳行為研究,碩士論文,國立台北科技大學機電整合研究所,台北,2009。
15.羅培元,楔形體導波傳播於具缺陷刃尖之行為研究,碩士論文,國立台北科技大學製造科技研究所,台北,2013。
16.K. Kawashima, “Finite element simulation of propagation of leaky surface waves excited by a line-focused transducer,” Review of progress in Quantitative Nondistructive Evaluation, vol. 17, 1998, pp. 955-1002.
17.M. J. S. Lowe, P. Cawley, J-Y. Kao, and O. Diligent, “The low frequency reflection characteristics of the fundamental antisymmetric Lambwave a_0 from a rectangular notch in a plate”, The Journal of the Acoustical Society of America, 112, 2002.
論文全文使用權限:同意授權於2018-11-12起公開