This paper describes a method for the calculation of the sensitivities of rotating blade root loads and hub loads to changes of blade design parameters using a chain rule differentiation approach. The algorithm exploits features of the formulation of the blade and fuselage equations of motion, and of the solution technique to calculate the sensitivities at a fraction of the cost of an aeroelastic analysis. The mathematical model of the blade includes nonlinearities due to moderately large elastic deflections and the fuselage is described by nonlinear Euler equations, so that the resulting model is valid for both straight and turning flight. The results indicate that the semi-analytical technique is very accurate and computationally efficient.
Efficient sensitivity analysis for rotary-wing aeromechanical problems
Eine effiziente feinstufige Untersuchung für aeromechanische Probleme an Rotorblättern
1993
11 Seiten, 15 Bilder, 13 Quellen
Conference paper
English
Luftfahrttechnik , Hubschrauber , Rotor (Drehflügel) , mathematisches Modell , Belastungsabhängigkeit , technische Entwicklung , experimentelle Untersuchung , Aeromechanik , Entwurfsparameter , Auslegung (Dimension) , analytische Untersuchung , Euler-Gleichung , Betriebsverhalten , Algorithmus , Prozessoptimierung
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