Effects of the characteristics of a force-driven bulkhead on the structural acoustics of an elastic cylinder

Langdon C. Heath, Naveendra Fernando, Hongmei Sun, David Matthews, Jie Pan

    Research output: Chapter in Book/Conference paperConference paper

    Abstract

    To study the structural acoustics of propeller-excited marine vessels, the hull and bulkhead, against which the thrust
    bearing is mounted, are often modelled as a circular cylinder and a cross-section plate. This paper concerns the effects of
    the characteristics of the cross-section plate on the vibration and radiated sound from the cylinder. The critical aspect is the coupling between the plate and cylinder, as this affects the input power of the excitation force at the plate and energy transfer from the plate to the cylinder and eventually to the radiated sound. The study compares the input mobility, averaged vibration response of the cylinder, and the radiated sound power with respect to the driving force for full-plate and half-plate configurations. Conditions associated with large sound power radiation from the cylinder are assessed through detailed measurement of the distributed sound intensity and vibration on the surface of the cylinder. The results demonstrate the drastic differences in the radiated sound power when different cross-section plates are used, and indicate the importance of coupling between the hull and bulkhead structure for controlling the radiated sound power from the propeller-driven hull–bulkhead structure.
    Original languageEnglish
    Title of host publicationProceedings of Acoustics 2016 - The Second Australasian Acoustical Societies Conference
    EditorsIan D. M. Hillock, David J. Mee
    PublisherAustralian Acoustical Society
    Pages1-10
    ISBN (Print)978-0-909882-26-6
    Publication statusPublished - 2016
    EventSecond Australasian Acoustical Societies Conference - Brisbane, Australia
    Duration: 9 Nov 201611 Nov 2016

    Conference

    ConferenceSecond Australasian Acoustical Societies Conference
    CountryAustralia
    CityBrisbane
    Period9/11/1611/11/16

    Fingerprint

    bulkheads
    elastic cylinders
    acoustics
    propellers
    vibration
    cross sections
    sound intensity
    circular cylinders
    vessels
    energy transfer

    Cite this

    Heath, L. C., Fernando, N., Sun, H., Matthews, D., & Pan, J. (2016). Effects of the characteristics of a force-driven bulkhead on the structural acoustics of an elastic cylinder. In I. D. M. Hillock, & D. J. Mee (Eds.), Proceedings of Acoustics 2016 - The Second Australasian Acoustical Societies Conference (pp. 1-10). Australian Acoustical Society.
    Heath, Langdon C. ; Fernando, Naveendra ; Sun, Hongmei ; Matthews, David ; Pan, Jie. / Effects of the characteristics of a force-driven bulkhead on the structural acoustics of an elastic cylinder. Proceedings of Acoustics 2016 - The Second Australasian Acoustical Societies Conference. editor / Ian D. M. Hillock ; David J. Mee. Australian Acoustical Society, 2016. pp. 1-10
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    title = "Effects of the characteristics of a force-driven bulkhead on the structural acoustics of an elastic cylinder",
    abstract = "To study the structural acoustics of propeller-excited marine vessels, the hull and bulkhead, against which the thrustbearing is mounted, are often modelled as a circular cylinder and a cross-section plate. This paper concerns the effects ofthe characteristics of the cross-section plate on the vibration and radiated sound from the cylinder. The critical aspect is the coupling between the plate and cylinder, as this affects the input power of the excitation force at the plate and energy transfer from the plate to the cylinder and eventually to the radiated sound. The study compares the input mobility, averaged vibration response of the cylinder, and the radiated sound power with respect to the driving force for full-plate and half-plate configurations. Conditions associated with large sound power radiation from the cylinder are assessed through detailed measurement of the distributed sound intensity and vibration on the surface of the cylinder. The results demonstrate the drastic differences in the radiated sound power when different cross-section plates are used, and indicate the importance of coupling between the hull and bulkhead structure for controlling the radiated sound power from the propeller-driven hull–bulkhead structure.",
    author = "Heath, {Langdon C.} and Naveendra Fernando and Hongmei Sun and David Matthews and Jie Pan",
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    Heath, LC, Fernando, N, Sun, H, Matthews, D & Pan, J 2016, Effects of the characteristics of a force-driven bulkhead on the structural acoustics of an elastic cylinder. in IDM Hillock & DJ Mee (eds), Proceedings of Acoustics 2016 - The Second Australasian Acoustical Societies Conference. Australian Acoustical Society, pp. 1-10, Second Australasian Acoustical Societies Conference, Brisbane, Australia, 9/11/16.

    Effects of the characteristics of a force-driven bulkhead on the structural acoustics of an elastic cylinder. / Heath, Langdon C.; Fernando, Naveendra; Sun, Hongmei; Matthews, David; Pan, Jie.

    Proceedings of Acoustics 2016 - The Second Australasian Acoustical Societies Conference. ed. / Ian D. M. Hillock; David J. Mee. Australian Acoustical Society, 2016. p. 1-10.

    Research output: Chapter in Book/Conference paperConference paper

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    AU - Fernando, Naveendra

    AU - Sun, Hongmei

    AU - Matthews, David

    AU - Pan, Jie

    PY - 2016

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    N2 - To study the structural acoustics of propeller-excited marine vessels, the hull and bulkhead, against which the thrustbearing is mounted, are often modelled as a circular cylinder and a cross-section plate. This paper concerns the effects ofthe characteristics of the cross-section plate on the vibration and radiated sound from the cylinder. The critical aspect is the coupling between the plate and cylinder, as this affects the input power of the excitation force at the plate and energy transfer from the plate to the cylinder and eventually to the radiated sound. The study compares the input mobility, averaged vibration response of the cylinder, and the radiated sound power with respect to the driving force for full-plate and half-plate configurations. Conditions associated with large sound power radiation from the cylinder are assessed through detailed measurement of the distributed sound intensity and vibration on the surface of the cylinder. The results demonstrate the drastic differences in the radiated sound power when different cross-section plates are used, and indicate the importance of coupling between the hull and bulkhead structure for controlling the radiated sound power from the propeller-driven hull–bulkhead structure.

    AB - To study the structural acoustics of propeller-excited marine vessels, the hull and bulkhead, against which the thrustbearing is mounted, are often modelled as a circular cylinder and a cross-section plate. This paper concerns the effects ofthe characteristics of the cross-section plate on the vibration and radiated sound from the cylinder. The critical aspect is the coupling between the plate and cylinder, as this affects the input power of the excitation force at the plate and energy transfer from the plate to the cylinder and eventually to the radiated sound. The study compares the input mobility, averaged vibration response of the cylinder, and the radiated sound power with respect to the driving force for full-plate and half-plate configurations. Conditions associated with large sound power radiation from the cylinder are assessed through detailed measurement of the distributed sound intensity and vibration on the surface of the cylinder. The results demonstrate the drastic differences in the radiated sound power when different cross-section plates are used, and indicate the importance of coupling between the hull and bulkhead structure for controlling the radiated sound power from the propeller-driven hull–bulkhead structure.

    UR - http://www.acoustics.asn.au/conference_proceedings/AASNZ2016/

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    Heath LC, Fernando N, Sun H, Matthews D, Pan J. Effects of the characteristics of a force-driven bulkhead on the structural acoustics of an elastic cylinder. In Hillock IDM, Mee DJ, editors, Proceedings of Acoustics 2016 - The Second Australasian Acoustical Societies Conference. Australian Acoustical Society. 2016. p. 1-10