The use of an active controlled enclosure to attenuate sound radiation from a heavy radiator

Yao Sun, Tiejun Yang, Minggang Zhu, Jie Pan

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    Active structural acoustical control usually experiences difficulty in the control of heavy sources or sources where direct applications of control forces are not practical. To overcome this difficulty, an active controlled enclosure, which forms a cavity with both flexible and open boundary, is employed. This configuration permits indirect implementation of active control in which the control inputs can be applied to subsidiary structures other than the sources. To determine the control effectiveness of the configuration, the vibro-acoustic behavior of the system, which consists of a top plate with an open, a sound cavity and a source panel, is investigated in this paper. A complete mathematical model of the system is formulated involving modified Fourier series formulations and the governing equations are solved using the Rayleigh-Ritz method. The coupling mechanisms of a partly opened cavity and a plate are analysed in terms of modal responses and directivity patterns. Furthermore, to attenuate sound power radiated from both the top panel and the open, two strategies are studied: minimizing the total radiated power and the cancellation of volume velocity. Moreover, three control configurations are compared, using a point force on the control panel (structural control), using a sound source in the cavity (acoustical control) and applying hybrid structural-acoustical control. In addition, the effects of boundary condition of the control panel on the sound radiation and control performance are discussed.

    Original languageEnglish
    Pages (from-to)1-17
    Number of pages17
    JournalJournal of Sound and Vibration
    Volume392
    DOIs
    Publication statusPublished - 31 Mar 2017

    Fingerprint

    Acoustic radiators
    radiators
    enclosure
    Enclosures
    Acoustic waves
    Radiation
    acoustics
    radiation
    control boards
    cavities
    configurations
    Rayleigh-Ritz method
    Structural panels
    subsidiaries
    Fourier series
    modal response
    active control
    directivity
    cancellation
    Force control

    Cite this

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    abstract = "Active structural acoustical control usually experiences difficulty in the control of heavy sources or sources where direct applications of control forces are not practical. To overcome this difficulty, an active controlled enclosure, which forms a cavity with both flexible and open boundary, is employed. This configuration permits indirect implementation of active control in which the control inputs can be applied to subsidiary structures other than the sources. To determine the control effectiveness of the configuration, the vibro-acoustic behavior of the system, which consists of a top plate with an open, a sound cavity and a source panel, is investigated in this paper. A complete mathematical model of the system is formulated involving modified Fourier series formulations and the governing equations are solved using the Rayleigh-Ritz method. The coupling mechanisms of a partly opened cavity and a plate are analysed in terms of modal responses and directivity patterns. Furthermore, to attenuate sound power radiated from both the top panel and the open, two strategies are studied: minimizing the total radiated power and the cancellation of volume velocity. Moreover, three control configurations are compared, using a point force on the control panel (structural control), using a sound source in the cavity (acoustical control) and applying hybrid structural-acoustical control. In addition, the effects of boundary condition of the control panel on the sound radiation and control performance are discussed.",
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    The use of an active controlled enclosure to attenuate sound radiation from a heavy radiator. / Sun, Yao; Yang, Tiejun; Zhu, Minggang; Pan, Jie.

    In: Journal of Sound and Vibration, Vol. 392, 31.03.2017, p. 1-17.

    Research output: Contribution to journalArticle

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