Abstract:

A design oriented method for the dynamic design optimization of composite rotor blades is presented. The design variables are classified into the shape variables of the cross section, the layer variables of composites, and the mass variables of lump masses. The methods of typical cross section design, variable linking, and continuing of the layer variables have been proposed to deal with these three kinds of variables effectively. The dynamic model has accounted for the effects of the cross section warping, the deformations coupling, and the gyroscopic force. The sensitivity analysis of the coupled frequencies is implemented by means of a three level calculation. The structural weight, vibration frequencies, and rotation inertia of the blade have been included into constraints. The optimization solution is based on the algorithm of sequential quadratic/linear programming. These methods are suitable to practical design and particular features of composite rotor blades.

Key words: r ot or blades, structura l opt imization, dynamics, design-or iented