The formulation and features of the Rotor-Airframe Comprehensive Analysis Program (RACAP) is described. The analysis employs a frequency domain, transfer matrix approach for the blade structural model, a time domain wake or momentum theory aerodynamic model, and impedance matching for rotor-fuselage coupling. The analysis is applied to the AH-1G helicopter, and a correlation study is conducted on fuselage vibration predictions. The purpose of the study is to evaluate the state-of-the-art in helicopter fuselage vibration prediction technology. The fuselage vibration predicted using RACAP are fairly good in the vertical direction and somewhat deficient in the lateral/longitudinal directions. Some of these deficiencies are traced to the fuselage finite element model.


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    Titel :

    Correlation of AH-1G Airframe Flight Vibration Data with a Coupled Rotor-Fuselage Analysis


    Beteiligte:
    K. Sangha (Autor:in) / J. Shamie (Autor:in)

    Erscheinungsdatum :

    1990


    Format / Umfang :

    172 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch






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