An Efficient Approach for Parametric Modeling and Prediction of the Hollow Blade Manufacture Shape

In recent years, hollow fan blades have been widely used to meet the requirements of aeroengines for lightweight and better performance. However, blade will change from manufacture shape operating with large deformations during operation. This deviation, if neglected, lead deceptive results structural aerodynamic analysis. existing methods low prediction accuracy or require a lot calculation in case deformations. this paper, an iterative method parametric modeling, automatic generation finite element model, hot-to-cold analysis H-shaped are proposed. The efficiency traditional uncoupling (UCM) weak coupling (WCS), as well proposed strong–weak (SWCS), compared strong (SCU) reference. Results show that improvements can be made by SWCS method, error maximum deformation is 2.3%, while UCM WCS 30% 12%, respectively. An excellent agreement observed between SCU whole height errors 2%~5%, time only 2.5% which reduced 7200 min 180 min, making it possible conduct at design stage.