Experimental investigation into sound and vibration of a torpedo-shaped structure under axial force excitation

James Leader, Jie Pan, Paul Dylejko, David Matthews

    Research output: Chapter in Book/Conference paperConference paper

    5 Citations (Scopus)

    Abstract

    In this study the sound radiation patterns and vibration characteristics of a torpedo-shaped structure are determined experimentally using a proof mass actuator to provide a nominally axial excitation of the model. Using this method the second energy path found in previous designed structures is eliminated. Input power and driving forces are measured using force transducers localized at the excitation device whilst the sound pressure and its directivity are captured by a spatially distributed microphone array inside an anechoic chamber. The vibration response and mode shapes are measured using an array of accelerometers contrasted by an hammer impace test and finite element modeling to investigate the free vibration response of the structure. Motivations for this work are to investigate the effect of the complex boundary constraints: a semi-spherical head and conical tail on the two meter long model when compared to existing analytical solutions for simple geometries, to investigate unforeseen effects of the practical structure, and later the measurement will be performed in an underwater experiment to contrast the effect of fluid loading.

    Original languageEnglish
    Title of host publicationProceedings of Meetings on Acoustics
    EditorsLuc Mongeau
    Place of PublicationAmerica
    PublisherAIP Publishing
    Number of pages9
    Volume19
    ISBN (Print)1939-800X
    DOIs
    Publication statusPublished - 2013
    Event2013 International Congress on Acoustics - Montreal, Montreal, Canada
    Duration: 2 Jun 20137 Jun 2013

    Conference

    Conference2013 International Congress on Acoustics
    CountryCanada
    CityMontreal
    Period2/06/137/06/13

    Fingerprint

    torpedoes
    vibration
    acoustics
    excitation
    hammers
    anechoic chambers
    modal response
    free vibration
    directivity
    accelerometers
    sound pressure
    microphones
    transducers
    actuators
    fluids
    radiation
    geometry
    energy

    Cite this

    Leader, J., Pan, J., Dylejko, P., & Matthews, D. (2013). Experimental investigation into sound and vibration of a torpedo-shaped structure under axial force excitation. In L. Mongeau (Ed.), Proceedings of Meetings on Acoustics (Vol. 19). [065059] America: AIP Publishing. https://doi.org/10.1121/1.4799693
    Leader, James ; Pan, Jie ; Dylejko, Paul ; Matthews, David. / Experimental investigation into sound and vibration of a torpedo-shaped structure under axial force excitation. Proceedings of Meetings on Acoustics. editor / Luc Mongeau. Vol. 19 America : AIP Publishing, 2013.
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    abstract = "In this study the sound radiation patterns and vibration characteristics of a torpedo-shaped structure are determined experimentally using a proof mass actuator to provide a nominally axial excitation of the model. Using this method the second energy path found in previous designed structures is eliminated. Input power and driving forces are measured using force transducers localized at the excitation device whilst the sound pressure and its directivity are captured by a spatially distributed microphone array inside an anechoic chamber. The vibration response and mode shapes are measured using an array of accelerometers contrasted by an hammer impace test and finite element modeling to investigate the free vibration response of the structure. Motivations for this work are to investigate the effect of the complex boundary constraints: a semi-spherical head and conical tail on the two meter long model when compared to existing analytical solutions for simple geometries, to investigate unforeseen effects of the practical structure, and later the measurement will be performed in an underwater experiment to contrast the effect of fluid loading.",
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    Leader, J, Pan, J, Dylejko, P & Matthews, D 2013, Experimental investigation into sound and vibration of a torpedo-shaped structure under axial force excitation. in L Mongeau (ed.), Proceedings of Meetings on Acoustics. vol. 19, 065059, AIP Publishing, America, 2013 International Congress on Acoustics, Montreal, Canada, 2/06/13. https://doi.org/10.1121/1.4799693

    Experimental investigation into sound and vibration of a torpedo-shaped structure under axial force excitation. / Leader, James; Pan, Jie; Dylejko, Paul; Matthews, David.

    Proceedings of Meetings on Acoustics. ed. / Luc Mongeau. Vol. 19 America : AIP Publishing, 2013. 065059.

    Research output: Chapter in Book/Conference paperConference paper

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    Leader J, Pan J, Dylejko P, Matthews D. Experimental investigation into sound and vibration of a torpedo-shaped structure under axial force excitation. In Mongeau L, editor, Proceedings of Meetings on Acoustics. Vol. 19. America: AIP Publishing. 2013. 065059 https://doi.org/10.1121/1.4799693