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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 宋家驥 | |
dc.contributor.author | Ta-Wei Chiu | en |
dc.contributor.author | 邱大維 | zh_TW |
dc.date.accessioned | 2021-06-13T16:58:37Z | - |
dc.date.available | 2005-07-04 | |
dc.date.copyright | 2005-07-04 | |
dc.date.issued | 2003 | |
dc.date.submitted | 2005-03-22 | |
dc.identifier.citation | 1.L.E.Kinsler , A.R.Frey , A.B.Coppens ,and J.V.Sanders ,
Fundamentals of Acoustics (Wiley, New York, 1982), 3 rd ed., pp. 216-222. 2.W.Eversman , “Energy flow criteria for acoustic propagation in ducts with flow” , Journal of the Acoustical Society of America, (1970) , 49(6) , pp.1717- 1721 3.W.Eversman , “Acoustic energy in ducts: further observations” , Journal of Sound and Vibration , (1979) , 62(4) , pp.517-532 4.P.N.Shankar , “Acoustic refraction and attenuation in cylindrical and annular ducts” , Journal of Sound and Vibration , (1972) , 22(2) , pp.233-246 5.U.J.Kurze and I.L.Ver , “Sound attenuation in ducts lined with nonisotropic material” , Journal of Sound and Vibration , (1972) , 24(2) , pp.177-187 6.J.Y.Chung and D.A.Blaser , “Transfer Function Method of Measuring In-duct Acoustic Properties, Ⅰ. Theory” , J. Acoust. Soc. Am. 68, 907-913 (1980). 7.J.Y.Chung and D.A.Blaser , “Transfer Function Method of Measuring In-duct Acoustic Properties, Ⅱ . Experiment” , Journal of the Acoustical Society of America, 68 (3), 1980, pp. 907-921. 8.V.A.Del Grosso , “Remarks on ‘Axially Symmetric Vibrations of a Thin Cylindrical Elastic Shell Filled With Non Viscous Compressible Fluid’ by Ram Kumar, Acustica 17 [1968], 218,” Acustica 20, 313-314 (1968). 9.V.A.Del Grosso , “Analysis of Multimode Acoustic Propagation in Liquid Cylinders with Realistic Boundary Conditions ― Application to Sound Speed and Absorption Measurements” , Acustica 24, 299-311 (1971). 10.L.Dwynn Lafleur and F.Douglas Shields , “Low-frequency propagation modes in a liquid-filled elastic tube waveguide” , Journal of the Acoustical Society of America , (1995), 97(3) , pp.1435-1445 11.M.El-Raheb , “Acoustic propagation in finite length elastic cylinders .Part Ⅰ:Axisymmetric excitation,” “… Part Ⅱ:Asymmetric excitation,” J. Acoust. Soc. Am.71, 296-306, 307-317(1982). 12.R.D.Fay, R.L.Brown, and O.V.Fortier , “Measurement of Acoustic Impedance of Surfaces in Water” , J. Acoust. Soc. Am. 19 , 850-856 (1947). 13.M.P.Home and R.J.Hansen , “ Sound propagation in a pipe containing a liquid of comparable acoustic impedance” , J. Acoust. Soc. Am. 71 , 1400-1405 (1982). 14.W.J.Jacobi , “Propagation of Sound Waves along Liquid Cylinders” , J. Acoust. Soc. Am. 21 , 120-127 (1949). 15.ASTM Manual Series: Designation:E 1050-98 , “Standard Test Method for Impedance and Absorption of Acoustical of Materials Using A Tube , Two Microphones and A Digital Frequency Analysis System” , 100 Barr Habor Dr., West Conshohocken , PA 19428 16.ISO 10534-1:1996 , Acoustic-Determination of sound absorption coefficient and impedance in impedance tubes- Part2: Transfer – function method , pp 3-12 17.白明憲 , 聲學理論與應用 , 全華科技圖書股份有限公司 , 1999 18.J.D.Achenbach , Wave Propagation In Elastic Solids (American Elsevier , New York , 1973), p. 124. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/39036 | - |
dc.description.abstract | 本文旨在設計及製作一個專門用來量測水下吸音材的量測系統,藉此可以量測不同材料的聲學參數,例如反射係數、正向入射吸收係數、以及特殊音響阻抗比等。其免除了以往如迴響室等龐大硬體工程的建造,在價錢上較為低廉,機動性也較高。
首先,根據ASTM設計規範為阻抗管之設計準則,進而配合波導管平面波傳理論設計出不同管徑的阻抗管各一組。其次,為了測試阻抗管的可用性,利用轉換函數法針對所需之實驗配置經由不斷的測試來證明如此的設計是否可行。再者由於管壁的剛性與否,將會影響到波導管的波傳模態,所以我們加以配合彈性波導管理論,進而求出其模態頻散曲線以及質點位移分佈圖,進一步的比較剛性與彈性波導管之差異。這些被量測到的特性可用於基本研究和發展吸音材,並可供學術界相關研究作參考。 | zh_TW |
dc.description.abstract | The thesis mainly discusses the design and fabrication of underwater impedance tube for the measurement of material acoustic characteristic. This test method can be applied to measure sound reflection coefficient, normal incidence sound absorption coefficient and specific acoustic impedance ratio of materials.
Firstly, the impedance tubes of different sizes are made according to ASTM standards and the theory of plane wave propagation. Then the theory of a transfer function method of measuring normal incident in-duct acoustic properties is presented. However, the elastic moduli and density of the tube wall and the fluid are often of similar magnitudes, and the rigid wall approximation is invalid. As a result, for example, the plane-wave mode characteristic of the rigid wall waveguide degenerates to a mode with phase velocity somewhat slower than the intrinsic sound velocity. So we study the two (ET0 and ET1) low-frequency axisymmetric propagation modes in the liquid-filled elastic tube waveguide and it is be shown for numerical calculations of modal dispersion curves and particle displacements. The properties measured with this test method are useful in basic research and product development of sound absorptive materials. | en |
dc.description.provenance | Made available in DSpace on 2021-06-13T16:58:37Z (GMT). No. of bitstreams: 1 ntu-92-R90525039-1.pdf: 702296 bytes, checksum: 6fe977c695953f73edc0e8108791fd2b (MD5) Previous issue date: 2003 | en |
dc.description.tableofcontents | 摘要…………………………………………….……………………….Ⅰ
目錄……………………………………………………………………..Ⅲ 附圖目錄………………………………………………………………..Ⅴ 符號說明………………………………………………………………..Ⅷ 第一章 緒 論 1-1 前 言……………………………………………………………...1 1-2 文獻回顧…………………………………………………………..2 1-3 研究目的與方法…………………………………………………..3 第二章 阻抗管之元件設計與量測方法 2-1 元件設計規範……………………………………………………..5 2-1-1 管子………………………………………………………...5 2-1-2 測試樣品支撐架…………………………………………...7 2-1-3 聲源………………………………………………………...8 2-1-4 水聽器……………………………………………………...8 2-1-5 測試樣品……………………………..…..……………….9 2-2 轉換函數………………...………………………………………10 2-3 轉換函數校正量測……………….……………………………..12 2-4 轉換函數與正向反射係數之關係…………..………………….13 第三章 圓柱形彈性波導管之理論模擬分析 3-1 模態頻散曲線關係…………………………………...…………17 3-2 質點振動位移關係……………………………...………………21 3-3 平面波運動之材料選擇與管徑最佳化設計…………………...23 3-4 不同管徑與材料之模擬計算結果比較………………………...24 第四章 阻抗管量測結果分析 4-1 實驗背景描述…………………………………………………...51 4-2 實驗儀器配置…………………………………………………...53 4-3 量測結果分析………………………………………………...…55 第五章 結論與未來研究方向 5-1 結論……………………………………………………………...62 5-2 未來研究方向…………………………………………………...65 參考文獻……………………………………………………………….66 | |
dc.language.iso | zh-TW | |
dc.title | 水下阻抗管之設計與吸音材量測 | zh_TW |
dc.title | Design of Underwater Impedance Tube for the Measurement of Material Acoustic Characteristics | en |
dc.type | Thesis | |
dc.date.schoolyear | 93-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 許榮均,謝傳璋,何文達 | |
dc.subject.keyword | 阻抗管, | zh_TW |
dc.subject.keyword | Impedance Tube, | en |
dc.relation.page | 67 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2005-03-24 | |
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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