The complex behaviour of a fuselage-cavity system in a modern propeller aircraft has been analysed with the finite element method. In the analysis the interaction between the fluid and the structure has been taken into account in a physical coupling formulation. The results obtained show that, at some frequencies, this coupling is very important for the vibroacoustic system response. The eigenfrequencies and eigenmodes of the fuselage-cavity found in the analysis are compared with experimental modal analysis on a mock-up of the aircraft. The agreement is very good from 10-130 Hz. Especially the modes with strong coupling are well pronounced in the experiments.


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    Titel :

    Finite element calculations of the interior noise of the Saab 340 aircraft


    Weitere Titelangaben:

    Finite Elemente Berechnung der Geraeusche im Inneren des Flugzeugs Saab 340


    Beteiligte:
    Goeransson, P. (Autor:in)

    Erschienen in:

    SAE-Papers ; Apr ; 1-16


    Erscheinungsdatum :

    1989


    Format / Umfang :

    16 Seiten, 15 Bilder, 2 Tabellen, 4 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





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