›› 2010, Vol. 30 ›› Issue (3): 144-147.DOI: 10.3969/j.issn.1006-1355.2010.03.038

• 减振降噪设备和器材 • 上一篇    下一篇

《扩张室式消声器声学特性的有限元分析》

刘飞1,陆森林1,刘红光1,汪静2   

  1. (1.江苏大学汽车与交通工程学院,江苏镇江212013;2.昌硕科技(上海)有限公司,上海201319)
  • 收稿日期:2009-06-25 修回日期:1900-01-01 出版日期:2010-06-18 发布日期:2010-06-18
  • 通讯作者: 刘飞

《Analysis of Acoustic Characteristics for Expansion chamber Muffler Using Finite Element Method》

LIU Fei1,LU Sen-lin1,LIU Hong-guang1,Wang Jing2   

  1. (1.School of Automobile and Traffic Engineering,Jiangsu University,Zhenjiang Jiangsu212013,China;2.Chang Shuo Science and Technology (Shanghai) Co. Ltd,Shanghai 201319,China)
  • Received:2009-06-25 Revised:1900-01-01 Online:2010-06-18 Published:2010-06-18
  • Contact: LIU Fei

摘要: 应用有限元法分析进出口管同轴扩张室式消声器的声学性能,计算其传递损失并与一维平面波理论计算对比,分析一维平面波理论的适用范围。通过分析出口管偏置消声器,双出口管消声器和两腔消声器的声学性能表明:出口管位置和数量影响消声器中高频消声性能,而两腔消声器则能明显改善消声器中低频的消声效果。

关键词: 声学, 扩张室式消声器, 传递损失, 有限元法, 声学特性

Abstract: The finite element method is used to analyze the acoustic characteristics of an expansionchamber muffler with its inlet and outlet pipes being coaxial. Its transmission loss (TL) is calculated. The result is compared with that of the onedimensional solutions based on planar wave theory. The limitation of onedimensional planar wave theory is discussed. The acoustic characteristics of eccentric outlet muffler, doubleoutlet muffler and doublecavity muffler are analyzed. The result indicates that the position and the number of outlet can affect the acoustic characteristic of a muffler for higher and medium frequencies; while the doublecavity muffler has high noiseelimination efficiency for lower and medium frequencies.

Key words: acoustics, expansionchamber muffler, transmission loss (TL), finite element method, acoustic characteristic

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