An analytical model of the structural acoustic behaviour of a propeller aircraft including vibration absorbers attached to the fuselage has been developed. The model was then used to study the potential of vibration absorbers for reducing interior noise. The results demonstrate than when the absorbers are correctly configured, attenuation of 6-10 dB in the total interior acoustic energy density are possible. The model also demonstrated that globally detuning the absorbers to minimize an interior acoustic cost function gives improved attenuation over tuned absorbers. Further analysis indicated that the attenuations are relatively insensitive to small changes in the disturbance frequency at the blade passage frequency. The importance of the positioning of the absorbers is also shown.


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    Titel :

    Control of aircraft interior noise using globally detuned vibration absorbers


    Weitere Titelangaben:

    Begrenzung des Geräusches im Flugzeuginneren mit global verstimmten Schwingungsdämpfern


    Beteiligte:
    Fuller, C.R. (Autor:in) / Maillard, J.P. (Autor:in) / Mercadal, M. (Autor:in) / Flotow, A.H. von (Autor:in)


    Erscheinungsdatum :

    1995


    Format / Umfang :

    10 Seiten, 9 Bilder, 5 Tabellen, 15 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Control of aircraft interior noise using globally detuned vibration absorbers

    Fuller, C.R. / Maillard, J.P. / Mercadal, M. et al. | Tema Archiv | 1997


    Control of Aircraft Interior Noise Using Globally Detuned Vibration Absorbers

    Fuller, C. R. / Maillard, J. / Von Flotow, A. H. et al. | British Library Conference Proceedings | 1995



    Interior noise reduction of composite cylinders using distributed vibration absorbers

    Osman, Haisam / Johnson, Marty / Fuller, Chris et al. | AIAA | 2001