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双开口Helmholtz局域共振周期结构低频带隙特性研究

姜久龙 姚宏 杜军 赵静波 邓涛

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双开口Helmholtz局域共振周期结构低频带隙特性研究

姜久龙, 姚宏, 杜军, 赵静波, 邓涛

Low frequency band gap characteristics of double-split Helmholtz locally resonant periodic structures

Jiang Jiu-Long, Yao Hong, Du Jun, Zhao Jing-Bo, Deng Tao
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  • 设计了一种双开口Helmholtz周期结构,该周期结构单元采用双开口内外腔设计,基于多腔耦合局域共振机理,可大大增加局域共振区域,增加能得到较低的低频带隙特性.通过设计调节内腔弧长,可以使带隙移动,达到特定低频频段的隔声效果.在分析低频带隙形成机理和影响因素时,采用声电类比原理建立带隙起始频率和截止频率的计算数学模型并与有限元方法进行对比分析.研究表明:该结构具有良好的低频带隙特性,其最低带隙段为86.9138.2 Hz.外径一定的条件下,低频带隙受内腔弧长、内外腔间隔以及周期单元结构间隔影响,内腔弧长越长,低频带隙越低;内外腔间距离越大,从而内腔体积变小,带隙向高频移动,其低频效果变差;减小结构间距对低频带隙起始频率无影响,但可以大大增加低频带隙截止频率,从而增加带隙宽度.该研究结论可以为低频降噪领域提供一定的实践和理论支持.
    A double-split Helmholtz periodic structure with the characteristic of local resonance is designed and constructed in this paper. The double-split periodic structural cell which can be divided into internal and external cavities is adopted in structure. In such a kind of structure, the resonating area is remarkably expanded while the inner cavity is continuously enlarged. Thus, a satisfactory feature of low frequency resonance can be obtained. At the same time, the adjustability of band gap is achieved by the designed adjustment of the arc length of the inner cavity, therefore, the effect of sound insulation in a specific low frequency band can be achieved. In the analyses of the mechanism and factors of the generation of low frequency band gap, the mathematical model of the upper and lower limits of the band gap is established by using the electric circuit analogy. And some comparative analyses between the methods of electric circuit analogy and finite element method are carried out. The result suggests that a satisfactory feature of low frequency band gap is presented, and the first band-gap ranges from 86.9 Hz to 138.2 Hz. The low frequency band gap can be influenced by the arc length of inner cavity, the space between inner and outer cavities, and the interaction of the structural cells in the periodic arrangement. The longer the arc length of the inner cavity, the lower the low frequency band gap will be; the longer the distance between inner and outer cavities, and the higher the frequency of band gap, the worse the low frequency effect will be; the lower limit of low frequency band gap cannot be influenced by reducing the space between individual structures, on the contrary, the width of low frequency band gap can be sharply increased. Plenty of practical and theoretical support in the field of low frequency noise reduction is offered in the research.
      通信作者: 姚宏, yyyyaaohhong@sohu.com
    • 基金项目: 国家自然科学基金(批准号:11504429)资助的课题.
      Corresponding author: Yao Hong, yyyyaaohhong@sohu.com
    • Funds: Project supported by the National Natural Science Foundation of China (Grant No. 11504429).
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    Hussein M I, Hulbert G M, Scott R A 2006 J. Sound Vib. 289 779

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    Hussein M I, Hulbert G M, Scott R A 2007 J. Sound Vib. 307 865

    [4]

    Chen Y, Li J, Zhou J, Huang T, Zhou M, Yu D Y 2014 Shock Vib. 2014 189539

    [5]

    Liu Z Y, Zhang X X, Mao Y W 2000 Science 289 1734

    [6]

    Liu Z, Chan C T, Sheng P 2005 Phys. Rev. B 71 014103

    [7]

    Li J, Chan C T 2004 Phys. Rev. E 70 055602

    [8]

    Deng K, Ding Y, He Z, Zhao H, Shi J, Liu Z 2009 J. Appl. Phys. 105 124909

    [9]

    Maldovan M 2013 Nature 503 209

    [10]

    Zhang S, Yin L, Fang N 2009 Phys. Rev. Lett. 102 194301

    [11]

    Mei J, Ma G, Yang M, Yang Z, Wen W, Sheng P 2012 Nat. Commun. 32 756

    [12]

    Zhou X, Badreddine Assouar M, Oudich M 2014 J. Appl. Phys. 116 194501

    [13]

    Fang N, Xi D, Xu J, Ambati M, Srituravanich W, Sun C 2006 Nat. Mater. 5 452

    [14]

    Ding C, Hao L, Zhao X 2010 J. Appl. Phys. 108 074911

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    Hao L M, Ding C L, Zhao X P 2012 Appl. Phys. A 106 807

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    Guan D, Wu J H, Li J, Gao N S, Hu M 2015 Noise Control Eng. J. 63 20

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    Murray A R J, Summers I R, Sambles J R, Hibbins A P 2014 J. Acoust. Soc. Am. 136 980

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  • 被引次数: 0
出版历程
  • 收稿日期:  2016-08-12
  • 修回日期:  2016-12-27
  • 刊出日期:  2017-03-05

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