In order to enhance the aeroelastic stability of a tiltrotor aircraft, a structural optimization framework is developed by applying a multi-level optimization approach. Each optimization level is designed to achieve a different purpose; therefore, relevant optimization schemes are selected for each level. Enhancement of the aeroelastic stability is selected as an objective in the upper-level optimization. This is achieved by seeking the optimal structural properties of a composite wing, including its mass, vertical, chordwise, and torsional stiffness. In the upper-level optimization, the response surface method (RSM), is selected. On the other hand, lower-level optimization seeks to determine the local detailed cross-sectional parameters, such as the ply orientation angles and ply thickness, which are relevant to the wing structural properties obtained at the upper-level. To avoid manufacturing difficulties, only a few discrete ply orientation angles and an integral number of plies are considered as constraints. A genetic algorithm is selected as the optimizer at the lower-level. Use of the upper-level optimization causes a 13-18% increase in the flutter speed when compared to the baseline configuration. In the lower-level optimization, the optimization results were obtained considering the resulting failure margin and the location of the shear center.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Structural design optimization of a tiltrotor aircraft composite wing to enhance whirl flutter stability


    Additional title:

    Konstruktive Gestaltungsoptimierung eines Kipprotorflügels aus Verbundwerkstoff zur verbesserten Flatterstabilität


    Contributors:

    Published in:

    Composite Structures ; 95 ; 283-294


    Publication date :

    2013


    Size :

    12 Seiten, 10 Bilder, 11 Tabellen, 35 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Design optimization for improved tiltrotor whirl flutter stability

    Hathaway, Eric / Gandhi, Farhan | Tema Archive | 2007



    ACTIVE WING TIPS FOR TILTROTOR WHIRL FLUTTER STABILITY AUGMENTATION

    KANG HAO / FLOROS MATTHEW W | European Patent Office | 2019

    Free access

    Design optimization framework for tiltrotor composite wings considering whirl flutter stability

    Park, Jae-Sang / Jung, Sung Nam / Lee, Myeong-Kyu et al. | Tema Archive | 2010


    Design Optimization for Soft-Inplane Tiltrotor Whirl Flutter Stability Improvement

    Paik, J. / Gandhi, F. / AHS International | British Library Conference Proceedings | 2007