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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/46146完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 宋家驥 | |
| dc.contributor.author | Chang-Wei Kuo | en |
| dc.contributor.author | 郭章緯 | zh_TW |
| dc.date.accessioned | 2021-06-15T04:55:31Z | - |
| dc.date.available | 2013-07-30 | |
| dc.date.copyright | 2010-07-30 | |
| dc.date.issued | 2010 | |
| dc.date.submitted | 2010-07-30 | |
| dc.identifier.citation | [1] W.P. Mason, “Electromechanical Transducers and Wave Filters”, Princeton. NJ: Van Nostrand. (1948)
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Cornuelle, “Evaluation of a longrange joint navigation/thermometry system,” IEEE Oceans'06 Conf, Boston, MA, MTS/IEEE, (2006) [20] Andrey K. Morozova and Douglas C. Webb, “Underwater tunable organ-pipe sound source”, Journal of Acoustical Society of America. Am. 122 2, August (2007) [21] James F. Tressler, Wenwu Cao, Kenji Uchine, “Finite Element Analysis of the Cymbal-Type Flextensional Transducer”, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, vol.45, No.5, pp.1363-1369. (1998) [22] Jindong Zhang, W. Jack Hughes, Philippe Bouchilloux, R.J. Meyer Jr., Kenji Uchino, Robert E. Newnham, “A class V flextensional transducer: the cymbal”,Ultrasonics,vol.37, pp. 387–393 (1999) [23] Manoj Narayanan and Robert W. Schwartz, “Finite Element Modeling of a Donut Flextensional Transducer”, Journal of Ceramic Society of America., vol. 90 ,No. 3, pp. 850–857 (2007) [24] R.J. Meyer Jr., A. Dogan, C. Yoon, S.M. Pilgrim, R.E. 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O’Brien, “Single-element Transducer”, Bioacoustics Research Lab, Department of electrical and computer engineering, University of Illinois. [36] http://signal-processing.com/transducers/transducers_theory_frame.htm [37] 馮若，“超聲手冊”，南京大學出版社，ISBN: 7305033545 (2001) [38] 周卓明，“壓電力學”，千華出版社，ISBN: 9572142402 (2003) [39] 羅振昇，“壓電換能器振動模態分析”，國立台灣大學造船工程學系碩士論文，民國86年。 [40] 李昆展，“非均勻厚度壓電超音波換能器之分析模擬、製作與特性量測”，國立成功大學機械工程學系碩士論文，民國92年。 [41] 鄭建華、張建中、賴文斌與游夢龍，“超音波壓電換能器的設計與製造”，檢測科技十四卷五期（9-10），pp.252-263，民國85年。 [42] 朱雅雯，“超音波壓電換能器多層匹配結構之研析”， 國立台灣大學工程科學及海洋工程學研究所，民國94年。 | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/46146 | - |
| dc.description.abstract | 本文運用有限元素分析，探討壓電換能器的機械、電學以及聲學特性。機械與電學特性主要討論壓電圓盤在不同的直徑厚度比(D/T ratio)下對於共振頻率以及機電耦合係數(Electromechanical coupling coefficient)的影響，此外本文也討論加入了不同阻尼的背膠層(Backing layer)，對於結構振動以及機械品質因子(Mechanical quality factor)的影響。聲學特性方面，本文利用圓形活塞的指向性函數，分別在不同頻率的驅動下，探討其指向性(Directivity)的差異以及產生的旁辦(Side lobe)，並且利用有限元素模擬，透過壓電圓盤振動時產生的法線加速度，將此自由度傳遞於流體介質，所以在流體空間中將會產生聲壓分佈。最後本文嘗試設計與模擬一種應用在水下流速量測的換能器，稱之為低頻管路換能器(Low Frequency Organ Pipe Projector)，此種換能器的聲源端可以由壓電陶瓷的徑向振動，轉化為金屬板的彎曲運動，放大金屬板垂直方向的振動位移，造成較大的出力，並且以理想活塞聲源探討頻率與管長的關係，將所設計的聲源端以及推算的最佳管長合併計算，討論理想與非理想活塞聲源產生的聲壓分佈。 | zh_TW |
| dc.description.abstract | This study use finite element analysis to discuss mechanical、electrical and
acoustical characteristics of the piezoelectric transducer. Mechanical and electrical characteristics are concerning the influence of electromechanical coupling coefficient and resonance frequency under different D/T ratio. It is also concerning the influence of vibration behavior and mechanical quality factor when adding different backing layers. In acoustical characteristics, this study use the circular piston directivity function to discuss the differences of directivity and side lobe generated under different excitation frequency. It also use finite element simulation to verify the result. When piezoelectric disk vibrating, it will produce the normal acceleration on the disk surface. This degree of freedom to pass on the fluid medium, it will produce sound pressure distribution in the fluid space. Finally, this study tries to design and simulate an underwater flow measurement transducer, which called Low Frequency Organ Pipe Projector. Transducer sound source can be generated by the radial vibration of piezoelectric ceramic transfer into the metal plate bending motion. It can enlarge vertical displacement of the metal plate to generate greater sound output. However, the frequency generated by the transducer has relationship with tube length. This study tries to determine optimal tube length and discuss the differences of sound pressure which generated by ideal sound source and non- ideal sound source. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-15T04:55:31Z (GMT). No. of bitstreams: 1 ntu-99-R96525015-1.pdf: 9014717 bytes, checksum: 9e662acdd0c63087b5782fabbfaef9ad (MD5) Previous issue date: 2010 | en |
| dc.description.tableofcontents | 摘要 ......................................................I
Abstract .................................................II 目錄 ....................................................III 表目錄 ....................................................V 圖目錄 .................................................. VI 第一章 緒論................................................1 1-1 研究動機與目的.........................................1 1-2 文獻回顧...............................................2 1-3 論文架構與研究方法.....................................4 第二章 有限元素法理論......................................5 2-1 壓電介質之組成方程式...................................6 2-2 壓電換能器之有限元素分析..............................11 2-2-1 壓電介質之有限元素法理論............................11 2-2-2 壓電換能器之動態方程式..............................13 2-2-3 壓電換能器之模態分析................................13 2-2-4 特徵值之求解........................................15 2-2-5 穩態下之響應函數....................................17 2-3 機電耦合係數..........................................19 2-3-1 典型邊界條件下之機電耦合係數........................20 2-3-2 機電耦合係數公式....................................22 第三章 壓電換能器結構及其特性.............................23 3-1 壓電換能器介紹........................................24 3-2 壓電效應..............................................24 3-3 壓電材料..............................................25 3-4 換能器結構............................................29 3-5 換能器重要參數........................................34 3-6 換能器側向聲場........................................38 第四章 壓電換能器模擬.....................................41 4-1 計算結果與參考文獻之比較..............................43 4-2 共振模態分析..........................................46 4-3 電性阻抗頻率響應......................................48 4-4 背膠層之影響..........................................54 4-4-1 背膠層特性..........................................54 4-4-2 背膠層模擬..........................................55 4-5 輻射聲場特性..........................................57 4-5-1 二維軸對稱輻射聲場模擬..............................58 4-5-2 圓形活塞指向性函數..................................61 第五章 低頻管路換能器模擬.................................63 5-1 管路換能器簡介........................................63 5-1-1 腔體共振行為........................................64 5-1-2 低頻管路換能器......................................65 5-2 管路換能器模擬........................................66 5-2-1 圓盤結構振動........................................66 5-2-2 理想活塞聲源........................................68 5-2-3 圓盤結構聲源........................................70 第六章 結果與討論.........................................73 參考文獻..................................................75 | |
| dc.language.iso | zh-TW | |
| dc.subject | 低頻管路換能器 | zh_TW |
| dc.subject | 有限元素法 | zh_TW |
| dc.subject | 共振模態 | zh_TW |
| dc.subject | 機電耦合係數 | zh_TW |
| dc.subject | 機械品質因子 | zh_TW |
| dc.subject | 背膠層 | zh_TW |
| dc.subject | 指向 性 | zh_TW |
| dc.subject | low frequency organ pipe projector | en |
| dc.subject | finite element method | en |
| dc.subject | mode shape | en |
| dc.subject | electromechanical coupling coefficient | en |
| dc.subject | mechanical quality factor | en |
| dc.subject | backing layer | en |
| dc.subject | directivity | en |
| dc.title | 壓電換能器與低頻管路換能器之有限元素分析與模擬 | zh_TW |
| dc.title | Finite Element Analysis for Piezoelectric Transducer and
Low Frequency Organ Pipe Projector | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 98-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 王昭男,李永春,賴文斌 | |
| dc.subject.keyword | 有限元素法,共振模態,機電耦合係數,機械品質因子,背膠層,指向 性,低頻管路換能器, | zh_TW |
| dc.subject.keyword | finite element method,mode shape,electromechanical coupling coefficient,mechanical quality factor,backing layer,directivity,low frequency organ pipe projector, | en |
| dc.relation.page | 79 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2010-07-30 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 工程科學及海洋工程學研究所 | zh_TW |
| 顯示於系所單位： | 工程科學及海洋工程學系 | |
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