Underwater sound scattering and absorption by a coated infinite plate with attached periodically located inhomogeneities

Y. Zhang, H. Huang, J. Zheng, Jie Pan

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    © 2015 Acoustical Society of America. This paper extends previous work of Zhang and Pan [J. Acoust. Soc. Am. 133(4), 2082-2096 (2013)] on sound scattering and absorption by an underwater coated plate with a single attached distributed-inhomogeneity to that with periodically located distributed-inhomogeneities. A comparison is made among cases of a plate without inhomogeneities, a plate with inhomogeneities, and one with inhomogeneities ignoring the mutual coupling. Results show that coupling of the structural waves scattered by the inhomogeneities plays an important role in modifying the sound absorption and scattering of surface sound pressure, especially at low frequencies and/or the resonance frequencies of the trapped modes of the plate. The sound absorption of the plate is dependent on the distance between the adjacent inhomogeneities, the length of the inhomogeneity, and the angle of the incident sound. On the surface of the inhomogeneities, the scattered/total sound pressure is generally enhanced. On the surface in between the inhomogeneities, the pressure is also enhanced at low frequencies but is nearly unchanged at higher frequencies. Results also show that the coupling-induced variation of scattered/total pressure is significant only at the resonance frequencies of the global modes and trapped modes. The surface normal velocity is presented to explain the coupling-induced variations in the vibration and pressure fields.
    Original languageEnglish
    Pages (from-to)2707-2721
    JournalJournal of the Acoustical Society of America
    Volume138
    Issue number5
    DOIs
    Publication statusPublished - 2015

    Fingerprint

    underwater acoustics
    inhomogeneity
    scattering
    sound transmission
    sound pressure
    Underwater
    Sound
    low frequencies
    acoustics
    pressure distribution
    vibration

    Cite this

    @article{bca82d4e08f14877b3df46fd940ec97e,
    title = "Underwater sound scattering and absorption by a coated infinite plate with attached periodically located inhomogeneities",
    abstract = "{\circledC} 2015 Acoustical Society of America. This paper extends previous work of Zhang and Pan [J. Acoust. Soc. Am. 133(4), 2082-2096 (2013)] on sound scattering and absorption by an underwater coated plate with a single attached distributed-inhomogeneity to that with periodically located distributed-inhomogeneities. A comparison is made among cases of a plate without inhomogeneities, a plate with inhomogeneities, and one with inhomogeneities ignoring the mutual coupling. Results show that coupling of the structural waves scattered by the inhomogeneities plays an important role in modifying the sound absorption and scattering of surface sound pressure, especially at low frequencies and/or the resonance frequencies of the trapped modes of the plate. The sound absorption of the plate is dependent on the distance between the adjacent inhomogeneities, the length of the inhomogeneity, and the angle of the incident sound. On the surface of the inhomogeneities, the scattered/total sound pressure is generally enhanced. On the surface in between the inhomogeneities, the pressure is also enhanced at low frequencies but is nearly unchanged at higher frequencies. Results also show that the coupling-induced variation of scattered/total pressure is significant only at the resonance frequencies of the global modes and trapped modes. The surface normal velocity is presented to explain the coupling-induced variations in the vibration and pressure fields.",
    author = "Y. Zhang and H. Huang and J. Zheng and Jie Pan",
    year = "2015",
    doi = "10.1121/1.4932167",
    language = "English",
    volume = "138",
    pages = "2707--2721",
    journal = "Journal of Acoustical Society of America",
    issn = "0001-4966",
    publisher = "ASA",
    number = "5",

    }

    Underwater sound scattering and absorption by a coated infinite plate with attached periodically located inhomogeneities. / Zhang, Y.; Huang, H.; Zheng, J.; Pan, Jie.

    In: Journal of the Acoustical Society of America, Vol. 138, No. 5, 2015, p. 2707-2721.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Underwater sound scattering and absorption by a coated infinite plate with attached periodically located inhomogeneities

    AU - Zhang, Y.

    AU - Huang, H.

    AU - Zheng, J.

    AU - Pan, Jie

    PY - 2015

    Y1 - 2015

    N2 - © 2015 Acoustical Society of America. This paper extends previous work of Zhang and Pan [J. Acoust. Soc. Am. 133(4), 2082-2096 (2013)] on sound scattering and absorption by an underwater coated plate with a single attached distributed-inhomogeneity to that with periodically located distributed-inhomogeneities. A comparison is made among cases of a plate without inhomogeneities, a plate with inhomogeneities, and one with inhomogeneities ignoring the mutual coupling. Results show that coupling of the structural waves scattered by the inhomogeneities plays an important role in modifying the sound absorption and scattering of surface sound pressure, especially at low frequencies and/or the resonance frequencies of the trapped modes of the plate. The sound absorption of the plate is dependent on the distance between the adjacent inhomogeneities, the length of the inhomogeneity, and the angle of the incident sound. On the surface of the inhomogeneities, the scattered/total sound pressure is generally enhanced. On the surface in between the inhomogeneities, the pressure is also enhanced at low frequencies but is nearly unchanged at higher frequencies. Results also show that the coupling-induced variation of scattered/total pressure is significant only at the resonance frequencies of the global modes and trapped modes. The surface normal velocity is presented to explain the coupling-induced variations in the vibration and pressure fields.

    AB - © 2015 Acoustical Society of America. This paper extends previous work of Zhang and Pan [J. Acoust. Soc. Am. 133(4), 2082-2096 (2013)] on sound scattering and absorption by an underwater coated plate with a single attached distributed-inhomogeneity to that with periodically located distributed-inhomogeneities. A comparison is made among cases of a plate without inhomogeneities, a plate with inhomogeneities, and one with inhomogeneities ignoring the mutual coupling. Results show that coupling of the structural waves scattered by the inhomogeneities plays an important role in modifying the sound absorption and scattering of surface sound pressure, especially at low frequencies and/or the resonance frequencies of the trapped modes of the plate. The sound absorption of the plate is dependent on the distance between the adjacent inhomogeneities, the length of the inhomogeneity, and the angle of the incident sound. On the surface of the inhomogeneities, the scattered/total sound pressure is generally enhanced. On the surface in between the inhomogeneities, the pressure is also enhanced at low frequencies but is nearly unchanged at higher frequencies. Results also show that the coupling-induced variation of scattered/total pressure is significant only at the resonance frequencies of the global modes and trapped modes. The surface normal velocity is presented to explain the coupling-induced variations in the vibration and pressure fields.

    U2 - 10.1121/1.4932167

    DO - 10.1121/1.4932167

    M3 - Article

    VL - 138

    SP - 2707

    EP - 2721

    JO - Journal of Acoustical Society of America

    JF - Journal of Acoustical Society of America

    SN - 0001-4966

    IS - 5

    ER -