The report contains the results of a full-scale experimental feasibility study of rotor isolation employing the Dynamic Antiresonant Vibration Isolator (DAVI). The full-scale experiments were performed on a UH-2 helicopter fuselage isolated from a simulated rotor and transmission. Tests were conducted for three directions of vibratory input at the hub on the nonisolated vehicle and then compared to results obtained for the isolated vehicles. Tests on the isolated helicopter were conducted for two-bladed, three-bladed, and four-bladed rotor configurations. These rotor configurations were simulated by proper tuning of the DAVI isolation system to the predominant excitation frequency of the rotor systems. Results of this experimental study on a 6500-pound helicopter show that rotor isolation is feasible. Excellent reduction of vibration throughout the fuselage was obtained at the predominant excitation frequency (n-per-rev). This was accomplished with low static deflection, minimum weight penalty, and small relative vibratory deflections between the rotor and fuselage. (Author)


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    Titel :

    Full-Scale Experimental Feasibility Study of Helicopter Rotor Isolation Using the Dynamic Antiresonant Vibration Isolator


    Beteiligte:
    R. Jones (Autor:in)

    Erscheinungsdatum :

    1971


    Format / Umfang :

    143 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Helicopter Rotor Isolation Evaluation Utilizing the Dynamic Antiresonant Vibration Isolator

    Jones,R. / McGarvey,J.H. / Kaman Aerospace,US et al. | Kraftfahrwesen | 1976


    Helicopter Rotor Isolation Evaluation Utilizing the Dynamic Antiresonant Vibration Isolator

    McGarvey, Joseph H. / Jones, Robert | SAE Technical Papers | 1976




    Helicopter Vibration Isolation

    KELLEY, BARTRAM | SAE Technical Papers | 1948