中国物理B ›› 2019, Vol. 28 ›› Issue (5): 54303-054303.doi: 10.1088/1674-1056/28/5/054303

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

A novel multi-cavity Helmholtz muffler

Han-Bo Shao(邵瀚波), Huan He(何欢), Yan Chen(陈岩), Guo-Ping Chen(陈国平)   

  1. State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • 收稿日期:2019-01-14 修回日期:2019-03-13 出版日期:2019-05-05 发布日期:2019-05-05
  • 通讯作者: Huan He E-mail:hehuan@nuaa.edu.cn
  • 基金资助:
    Project supported by Postgraduate Research & Practice Innovation Program of Jiangsu Province, China (Grant No. KYCX18_0249).

A novel multi-cavity Helmholtz muffler

Han-Bo Shao(邵瀚波), Huan He(何欢), Yan Chen(陈岩), Guo-Ping Chen(陈国平)   

  1. State Key Laboratory of Mechanics and Control of Mechanical Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2019-01-14 Revised:2019-03-13 Online:2019-05-05 Published:2019-05-05
  • Contact: Huan He E-mail:hehuan@nuaa.edu.cn
  • Supported by:
    Project supported by Postgraduate Research & Practice Innovation Program of Jiangsu Province, China (Grant No. KYCX18_0249).

摘要: A novel multi-cavity Helmholtz muffler is proposed. The multi-cavity Helmholtz muffler is composed of steel structures and silicone membranes. With suitable construction, the Helmholtz muffler can be designed to exhibit negative mass density in low frequency, and the muffling frequency can be adjusted when we change the internal structure of the cavity, which will be very attractive for noise control. In this paper, we investigate the influence of the membranes and the cavities on noise reduction characteristics with theoretical calculations and simulations. The results show that the numbers of membranes and the volumes of the cavities can have a great effect on the position of the muffling frequency. The number of cavities can have a great effect on the width of the muffling frequency (reduce the noise by 10 dB). With different combinations of the membranes and cavities, we can get different muffling frequencies, which can meet different muffling demands in practical applications and is more flexible than the traditional Helmholtz cavity.

关键词: multi-cavity, Helmholtz muffler, negative mass density, noise reduction

Abstract: A novel multi-cavity Helmholtz muffler is proposed. The multi-cavity Helmholtz muffler is composed of steel structures and silicone membranes. With suitable construction, the Helmholtz muffler can be designed to exhibit negative mass density in low frequency, and the muffling frequency can be adjusted when we change the internal structure of the cavity, which will be very attractive for noise control. In this paper, we investigate the influence of the membranes and the cavities on noise reduction characteristics with theoretical calculations and simulations. The results show that the numbers of membranes and the volumes of the cavities can have a great effect on the position of the muffling frequency. The number of cavities can have a great effect on the width of the muffling frequency (reduce the noise by 10 dB). With different combinations of the membranes and cavities, we can get different muffling frequencies, which can meet different muffling demands in practical applications and is more flexible than the traditional Helmholtz cavity.

Key words: multi-cavity, Helmholtz muffler, negative mass density, noise reduction

中图分类号:  (Noise: its effects and control)

  • 43.50.+y
43.40.+s (Structural acoustics and vibration) 43.30.+m (Underwater sound)