The amount of noise reaching an aircraft's interior by structureborne paths, when high levels of other noises are present, involves the measurement of transfer functions between vibrating levels on the wing and interior noise. The magnitude of the structureborne noise transfer function is established by exciting the aircraft with an electrodynamic shaker; a second transfer function is measured using the same sensor locations with the aircraft engines operating. Attention is given to the case of a twin-turboprop OV-10A aircraft; the resulting transfer function values at the discrete frequencies corresponding to the propeller blade passage frequency and its first four harmonics are tabulated and illustrated.


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    Title :

    Structureborne noise in aircraft


    Contributors:

    Conference:

    Mechanical signature analysis - Machinery vibration, flow-induced vibration, and acoustic noise analysis


    Publication date :

    1987-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Structureborne noise in aircraft

    Clevenson, S.A. / Metcalf, V.L. | Tema Archive | 1987


    Structureborne Noise in Aircraft: Modal Tests

    S. A. Clevenson / V. L. Metcalf | NTIS | 1986



    Structureborne noise in aircraft: Modal tests

    Clevenson, S. A. / Metcalf, V. L. | NTRS | 1986