The advantages of using multiple surrogates for approximation and reduction of helicopter vibration are studied. Multiple approximation methods, including a weighted-average approach, are considered so that pitfalls associated with only using a single best surrogate for the rotor blade vibration-reduction problem are avoided. A vibration objective function corresponding to a flight condition in which blade-vortex interaction causes high levels of vibration is considered. The design variables consist of cross-sectional dimensions of the structural member of the blade and nonstructural masses. The optimized designs are compared with a baseline design resembling a Messerschmitt-Bölkow-Blohm BO-105 blade. The results indicate that at relatively little additional cost compared with optimizing a single surrogate, multiple surrogates can be used to locate various reduced-vibration designs that would be overlooked if only a single approximation method was employed, and the most accurate surrogate may not lead to the best design.


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    Title :

    Multiple-surrogate approach to helicopter rotor blade vibration reduction


    Additional title:

    Multiple Surrogat-Näherung zur Vibrationsverminderung von Hubschrauber-Rotorblättern


    Contributors:

    Published in:

    AIAA Journal ; 47 , 1 ; 271-282


    Publication date :

    2009


    Size :

    12 Seiten, 8 Bilder, 8 Tabellen, 32 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English