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.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

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


    Contributors:
    K. Sangha (author) / J. Shamie (author)

    Publication date :

    1990


    Size :

    172 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English






    Coupled Rotor/Fuselage Vibration Analysis Using Detailed 3-D Airframe Model

    Yeo, H. / Chopra, I. | British Library Conference Proceedings | 1999


    Coupled Rotor/Airframe Vibration Analysis

    R. Sopher / R. E. Studwell / S. Cassarino et al. | NTIS | 1982


    Coupled rotor/airframe vibration analysis

    Sopher, R. / Studwell, R.E. / Cassarino, S. et al. | Tema Archive | 1982