Dynamic Analysis and Optimization of Rotor Blades

摘要

This paper presents a formulation for dynamic analysis of rotor blades which considers the effects of warping, coupling and anisotropy of materials, and applies the Sequential Quadratic Programming(SQP) approach to dynamic optimization problems subjected to constraints on multi-frequencies and dynamic response of rotor blades. The algorithm based on SQP, which executes the frequency adjusting step and weight reducing step alternatively, enables us to deal with the initial infeasible design effectively. Further, we implement the adaptive move limit and the Approximate Line Search(ALS) to define the step-length, and make the algorithm stable and robust. The effectiveness of the algorithm is demonstrated by the computational results for the rotor blade of a helicopter.