The paper demonstrates a mechanical impedance approach to an aircraft vibration problem. The desire is to reduce cabin noise resulting from fuselage vibration generated by engine rotor unbalance disturbances. A simplified analytical model is used in combination with experimental impedance data to investigate the effectiveness of several schemes applied to the engine/airframe interface. Airframe vibration absorbers are found to be the most effective. Qualitative correlation is achieved with the results of the installation of absorbers on the Douglas DC-9 aircraft. A more comprehensive analytical model is generated to account for three-dimensional effects; data acquistion for this model is discussed.


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    Title :

    Mechanical Impedance Approach to Engine Vibration Transmission Into an Aircraft Fuselage


    Additional title:

    Sae Technical Papers


    Contributors:
    Biehl, F. A. (author) / Rubin, S. (author)

    Conference:

    Aeronautic and Space Engineering and Manufacturing Meeting ; 1967



    Publication date :

    1967-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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