Research of Muffler with Perforated Tube and Its Acoustic Properties Measurement
Abstract: The perforated rate is a key parameter for the acoustical properties of muffler. To control the transmission loss of the muffler without replacing the chamber volume, an assembled muffler structure is supposed by inserting perforated tubes with different rate into the chamber. The transmission loss of the designed muffler is solved numerically with the finite element method (FEM). The simulation indicates that the acoustic properties of muffler with perforated tube share both the expansion chamber muffler and Helmholtz resonators. When the perforated rates close to zero, the TL curves exhibited resonated peak and the frequency band of the attenuated noise is limited. Increasing the perforated rate, the TL curves exhibit as arches. The bigger the perforated rate is, the closer to the expansion muffler. An impedance tube testing system is designed for measuring the mufflers. The data acquisition and analyzing program were compelled with LABVIEW. Experiments performed with the designed muffler show that in the low frequency band, the trans- mission loss can be controlled by the perforated rate of tube, which coincides with the simulation.
文章引用: 吕海峰 , 耿彦章 , 韩彦南 , 刘海霞 (2016) 穿孔管拆卸式消声器及其性能测试技术研究。 机械工程与技术， 5， 200-208. doi: 10.12677/met.2016.53024
Gerges, S.N.Y., Jordan, R., Thieme, F.A., et al. (2005) Muffler Modeling by Transfer Matrix Method and Experimental Verification. Journal of the Brazilian Society of Mechanical Sciences and Engineering, XXVII, 132-140.
 褚志刚, 王光建, 贺岩松, 等. 基于修正传递函数的消声器传声损失测量[J]. 内燃机工程, 2009, 30(2): 45-52.
 高林. 多线谱可调频水消声器仿真设计研究[D]. 哈尔滨: 哈尔滨工程大学, 2011.
 刘晨, 季振林, 徐航手, 等. 穿孔管消声器声学性能三维时域计算及分析[J]. 机械工程学报, 2012, 48(10): 7-13.
 Tao, Z. and Seybert, A.F. (2003) A Review of Current Techniques for Mea-suring Muffler Transmission Loss. SAE International.
 Yousefzadeh, B., Mahjoob, M., Mohammad, N., et al. (2008) An Experimental Study of Sound Transmission Loss Measurement Techniques Using an Impedance Tube. Acoustics 08, Paris, 29 June-4 July 2008, 964-968.
 孙路伟, 武秀东, 海智渊, 等. 基于LMS Virtual.Lab Acoustics的抗性消声器性能分析研究[J]. 机械, 2014(5): 57- 60.
 毕嵘. 复合式消声器声学特性的分析方法和实验研究[D]. 合肥: 合肥工业大学, 2012.