This paper adresses a multilevel decomposition procedure, for efficient design optimization of helicopter blades, with the coupling of aerodynamics, blade dynamics, aeroelasticity, and structures. The multidisciplinary optimization problem is decomposed into three levels. The rotor is optimized for improved aerodynamic performance at the first level. At the second level, the objective is to improve the dynamic and aeroelastic characteristics of the rotor. A structural optimization is performed at the third level. Interdisciplinary coupling is established through the use of optimal sensitivity derivatives. The Kreisselmeier-Steinauser function approach is used to formulate the optimization problem when multiple design objectives are involved. A nonlinear programming technique and an approximate analysis procedure are used for optimization. Results obtained show significant improvements in the rotor aerodynamic, dynamic, and structural characteristics, when compared with a reference or baseline rotor.
Multilevel decomposition procedure for efficient design optimization of helicopter rotor blades
Mehrebenenverfahren für eine wirtschaftliche und optimale Entwicklung von Rotorblättern für Hubschrauber
AIAA Journal ; 33 , 2 ; 223-230
1995
8 Seiten, 15 Bilder, 2 Tabellen, 24 Quellen
Article (Journal)
English
Multilevel Decomposition Procedure for Efficient Design Optimization of Helicopter Rotor Blades
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