An aeroelastic analysis based on a finite element method in space and time is developed for an advanced geometry composite rotor. Optimization studies are carried out for a four-bladed, soft-inplane hingeless rotor with variable sweep, anhedral and planform taper, and with a two-cell composite box-beam spar. The objective function includes vibratory hub loads and vibratory bending moments; constraints are imposed on blade rotating frequencies, aeroelastic stability and autorotational inertia. Design variables include ply angles of the laminated walls of the box-beam, sweep, anhedral and planform taper, and nonstructural mass and its chordwise offset from the elastic axis. Aeroelastic optimization is performed for different combinations of design variables. The starting design is a straight blade with no composite coupling. Compared to the starting design, an optimized solution achieved a reduction in the 4/rev loads of 40 % - 60 %, and 15 % - 25 % in the peak-to-peak vibratory flap and lag bending moments.


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    Title :

    Aeroelastic tailoring of composite couplings and blade geometry of a helicopter rotor using optimization methods


    Additional title:

    Das aeroelastische Auslegen von Verbundstoff-Kupplungen und der Rotorblattgeometrie eines Hubschraubers mit Hilfe der Optimierungsmethode


    Contributors:
    Ganguli, R. (author) / Chopra, I. (author)

    Published in:

    Publication date :

    1997


    Size :

    11 Seiten, 20 Bilder, 4 Tabellen, 15 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





    Aeroelastic Optimization of a Helicopter Rotor with Composite Tailoring

    Ganguli, R. / Chopra, I. / American Helicopter Society | British Library Conference Proceedings | 1993


    Aeroelastic Optimization of an Advanced Geometry Composite Helicopter Rotor

    Ganguli, R. / Chopra, I. / American Helicopter Society | British Library Conference Proceedings | 1995


    Aeroelastic optimization of an advanced geometry helicopter rotor

    Ganguli, R. / Chopra, I. | Tema Archive | 1992


    Aeroelastic optimization of an advanced geometry helicopter rotor

    GANGULI, RANJAN / CHOPRA, INDERJIT | AIAA | 1992