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.
Multiple-surrogate approach to helicopter rotor blade vibration reduction
Multiple Surrogat-Näherung zur Vibrationsverminderung von Hubschrauber-Rotorblättern
AIAA Journal ; 47 , 1 ; 271-282
2009
12 Seiten, 8 Bilder, 8 Tabellen, 32 Quellen
Aufsatz (Zeitschrift)
Englisch
Multiple-Surrogate Approach to Helicopter Rotor Blade Vibration Reduction
Online Contents | 2009
|Helicopter rotor blade design for minimum vibration
NTRS | 1984
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