Aeroelastic Analysis of Composite Blades Based on Surrogate Model

• 1、School of Mechanical Engineering, Hefei University of Technology

Abstract：Composite materials are widely used in helicopter blades and wind turbine blades because of their high mechanical properties, low weight, and better designability. Considering the complexity of the rotor flow field and the geometric nonlinearity of the composite blades with large aspect ratio, the CFD/FEA coupling calculation method is required for accurate aeroelastic analysis. However, The CFD-FEA is used to achieve a single bidirectional fluid-solid coupling analysis of the blades to be required a lot of time, and the calculation cost is unacceptable for the further optimal design. Aiming at the accuracy and efficiency of CFD/FEA coupled calculation of aeroelastic properties, a least square support vector machine (LSSVM) aerodynamic surrogate model based on singular value decomposition (SVD) and Latin hypercube is proposed to replace the CFD solver for rotor blades aeroelastic analysis. The research results show that the surrogate model method is feasible, efficient and accurate, and the aeroelastic analysis of composite blades can be performed quickly while ensuring accuracy.

Keywords： Composite CFD / FEA coupling Singular Value Decomposition Support Vector Machine Surrogate Model Aeroelasticity optimal?