A novel multi-cavity Helmholtz muffler
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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.
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.
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.
引文
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[3]Zhong L 2010 J.Wuhan University Technol.(Mater.Sci.Ed.).25 272
[4]Zhu Y W,Zhu F W,Zhang Y S,et al.2017 Appl.Acoust.116 9
[5]Hassan A M,Alrashdan A,Hayajneh M T,et al.2009 J.Mater.Process.Technol.209 894
[6]Liu Z,Chan C T and Sheng P 2005 Phys.Rev.B 71 014103
[7]Sigalas M M and Economou E N 1992 J.Sound Vib.158 377
[8]Yariv A and Mookherjea S 2002 International Journal of High Speed Electronics and Systems 12 207
[9]Sheng P,Zhang X X,Liu Z,et al.2012 Science 338 201
[10]Mei J,Ma G,Yang M,et al.2007 Phys.B Phys.Condens.Matter 394256
[11]Wang Y F,Wang Y S and Laude V 2015 Phys.Rev.B 92 104110
[12]Mei J,Liu Z,Wen W,et al.2007 Phys.Rev.B Condens.Matter 76134205
[13]Zhang L,Qiao W,Chen L,et al.2014 Optik-Int.J.For Light Electron.Opt.125 1354
[14]Fang N,Xi D,Xu J,et al.2006 Nat.Mater.5 452
[15]Ding C L and Zhao X P 2009 Acta Phys.Sin.58 6351(in Chinese)
[16]Lee S H,Park C M,Seo Y M,et al.2010 Phys.Rev.Lett.104 054301
[17]Shen H J,Wen J H,Pa¨?doussis M P,et al.2012.Phys.Lett.A 376 3351
[18]Ding Y,Liu Z,Qiu C,et al.2007 Phys.Rev.Lett.99 093904
[19]Liu G R,Nguyen-Thoi T,Nguyen-Xuan H,et al.2009 Comput.&Struct.87 14