Multiple Objectives Dynamics Optimization of SA349/2 Rotor Blades for Aeroelastic Stability
WANG Hong –zhou1; SUN Zhuang2; LIU Yong1;ZHANG Cheng-lin1
(1 National Key Laboratory of Rotorcraft Aeromechanics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; 2 People’s Liberation Army 122 Military Representative Office Plant, Harbin, 150066, China )
Abstract： The aeroelastic and dynamic analysis model of rotor blade was built based on the finite element approach (FEM). Multiple objectives optimization of a rotor blade was investigated to reduce the blade mass and the stress at blade root. Constraints on frequency placement, autorotational inertia, and aeroelastic stability of the blade were concerned. The sensitivity analysis of the objectives and constraints was conducted with the computation method based on chain rule. The optimization was carroed out satisfactorily by using the response surface model and simulated annealing algorithm. Taking the SA349-2 rotor blade as an optinization exaple, it is shown that the optimum solution results in a 1.05 times increase of autorotational inertia, a 6.0％～7.2% reduction of total mass of the rotor blade and a reduction in the peak-to-peak blade stress of 5.9％～7.1%,satisfying the constraint conditions of blade rotating frequencies , autorotational inertia ,aeroelastic stability and so on.
2010, Vol. 29 
