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標題: 含多孔連通管之單室排煙管的實驗以及有限元素分析研究
The Experimental Study and Finite Element Analysis of Single Chamber Muffler with Perforated tube
作者: 蔡宗翰
Tsai, Tzung-Han
關鍵字: 消音器
perforated tube
finite element method
transmission loss
出版社: 機械工程學系所
引用: [1] 劉建宏,“單室排煙管的實驗與數值分析研究”,碩士論文,國立中興大學機械工程研究所,2012。 [2] Craggs, A., “Note on the theory and application of a simple acoustic element”, Journal of sound and vibration, 1982: pp. 292-295. [3] Easwaran, V., Munjal, M.L., “Plane wave analysis of conical and exponential pipes with incompressible mean flow”, Journal of sound and vibration, 1992: pp. 73-79. [4] Rayleigh, John William Strutt, Baron, “The theory of sound”, London: Macmillan, 1877. [5] Ingrad, U., “On the theory and design of acoustic resonators”, The Journal of the Acoustical Society of America, 1953: pp. 1037-1061. [6] Melling, T.H., “The acoustic impedance of perforates at medium and high sound pressure level”, Journal of sound and vibration, 1973: pp. 1-65. [7] Sullivan, J.W., Crocker, M.J., “Analysis of concentric-tube resonators having unpartitioned cavities”, The Journal of the Acoustical Society of America, 1978: pp. 207-215. [8] Sullivan, J.W., “A method for modeling perforated tube muffler components. I. Theory”, The Journal of the Acoustical Society of America, 1979: pp. 772-778. [9] Luo, H., Tse, C.C., Chen, Y.N., “Modeling and applications of partially perforated intruding tube muffler”, Applied acoustics, 1995: pp. 99-116. [10] Chao Nan Wang, “A numerical scheme for the analysis of perforated intruding tube muffler components”, Applied acoustics, 1995: pp. 275-286. [11] Selamet, A., Denia , F.D., Besa, A.J., “Acoustic behavior of circular dual-chamber muffler”, Journal of sound and vibration, 2003: pp. 967-985. [12] Lee, I., Selamet, A., “Acoustic impedance of perforations in contact with fibrous material”, The Journal of the Acoustical Society of America, 2006: pp. 2785-2979. [13] Lee, I., “Acoustic characteristics of perforated dissipative and hybrid silencers”, Ph. D thesis, The Ohio State University, 2005: pp. 108-139. [14] Fairbrother, R., Varhos, E., “Acoustic simulation of an automotive muffler with perforated baffles and pipes”, Noise & Vibration Conference and Exhibition, Illinois, SAE Paper 2007-01-2206, 2007 [15] Zhongxu Kang, Sifa Zheng, Xiaomin Lian, “Study on the acoustic performance of perforated duct muffler”, Tsinghua University, 2010. [16] Li Jifeng, Chen Jian, Wen Zhiming, “Research on Muffling Performance of a Muffler with Complicated perforated Tube Structure”, Hefei University of Technology, 2010. [17] Xu Lei, LIU Zheng-shi, BI Rong, “Numerical analysis on acoustic and Resistance Performance of cross-flow Perforated Tube Silencers”, Institute of Sound and Vibration Research, Hefei University of Technology, 2010. [18] Denia* F.D., Martinez-Casas J., Baeza L., Fuenmayor F.J., “Acoustic modelling of exhaust devices with nonconforming finite element meshes and transfer matrices”, Applied Acoustic, 2012: pp. 713-722. [19] Antebas A.G., Denia* F.D., Pedrosa A.M., Fuenmayor F.J., “A finite element approach for the acoustic modeling of perforated dissipative mufflers with non-homogeneous properties”, Mathematical and Computer Modelling, 2012. [20] Chung, J.Y., Blaser, D.A., “Transfer function methods of measuring in-duct acoustic properties. I. theory”, General Motors Research Laboratories of Michigan, 1980: pp. 907-913. [21] Bryan Song, H., Stuart Bolton, J., “A transfer-matrix approach for estimating the characteristic impedance and wave numbers of limp and rigid porous materials”, Acoustical Society of America, 2000: pp. 1131-1152. [22] “Numerical Acoustics Theoretical Manual”, LMS International. [23] Yuan Xiang, “The Numerical Simulation Research on Resistance Perforated Tube Muffler”, Hefei University of Technology, 2009: pp. 40-42. [24] Zienkiewicz, O.C., “The Finite Element Methods in Engineering Sciences”, McGraw-Hill, London, 1971 [25] Craggs, A., “The use of simple three-dimensional acoustic finite elements for determining the natural modes and frequencies of complex shaped enclosures”, Journal of sound and vibration, Vol.23, No.3, 1972: pp. 331-339.
摘要: 汽機車進排氣系統是環境噪音的主要來源之一,控制噪音最有效的方法是在進排氣系統上使用消音器。抗性消音器製作過程簡易、成本低、消音性能良好,在消音器的領域有著重要的應用。設計高消音性能的抗性消音器成為目前進排氣噪音控制的重要課題。 由消音器之傳輸損失曲線圖可知在某些頻率點的消音效果不佳,低頻的部份也較不平滑,所以在消音器內部裝穿孔管可提高傳輸損失,同時將缺陷頻率提高、修正特定頻率點之消音效果。 本文以有限元素法對使用穿孔管的單膨脹室消音器進行數值模擬分析,並以實驗量測結果驗證。實驗方法為轉移函數法處理訊號,以四支麥克風量測,再透過四埠法計算傳輸損失,討論其優缺點。有限元素法模擬穿孔管消音器,採用Sullivan和Crocker經驗公式,透過施加阻尼邊界條件對穿孔管進行模擬,接著使用鄔教授所開發的聲學有限元素(FEAST)軟體進行數值模擬分析並求出穿孔管消音器的傳輸損失。
The intake and exhaust system of automotive is one of main sources of environmental noise, the most effective way to control intake and exhaust noise is using muffler in intake and exhaust system. The production process of resistance is simple, low cost, and the resistance muffler has better silencer performance. The resistance muffler has an important application in the area of muffler. Designing a resistance muffler with high silencer performance has become an important issue on intake and exhaust noise control. Poor silencing effect of certain frequencies can be obtained by the transmission loss curve. Low-frequency is not smooth, perforated tube can be installed inside of the muffler perforations to improve. This way can improve the defect frequency, and can be modified for specific frequency. Numerical simulations are presented in perforated tube muffler using the finite element method, and compared with experimental results from transfer function. To calculate the transmission loss, discuss the advantages and disadvantages. The Sullivan and Crocker formula is applied to the model by imposing impedance boundary condition. We use FEAST acoustic finite element software developed by Professor Wu to perform the numerical simulation analysis and to obtain the transmission loss of the perforated tube muffler.
其他識別: U0005-3007201319412600
Appears in Collections:機械工程學系所



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