Modelling and Validation of a V2500 Honeycomb-Core Fan Blade

摘要

Structural mechanics and also aerodynamics and aero elastics have a need for detailed and exact models of the regarded structures to create reliable results. The Institute of Structures and Design of the German Aerospace Center (DLR) located in Stuttgart has considerable experience in the field of mechanical analysis, design and assessment of aero engine structures as well as in the processing of these structures for further applications in aerodynamics and aero elastics. It is important to ensure that the hereby used methods in modelling and simulation are producing authentic results and the created data is feasible for usage in the linked disciplines. Therefore, the simulated behavior of a fan blade model of the engine of DLR research aircraft A320-ATRA (Advanced Technology Research Aircraft) was validated with measurements of real fan blades during the SAMURAI project. The paper describes a modelling technique for a fan blade with titanium honeycomb core in its context of an IAE V2500 aero engine based on provided CAD-data, x-ray and CT scans and measurements on existing structures. The fan blade model and particularly the influence of the honeycomb core were validated against Eigen frequencies and masses of real blades. With this baseline, simulations for several loading cases respectively several operating points were performed. The gained results were used on the one hand for aerodynamics and engine performance calculations in the context of the project and on the other hand for comparison with fan blade deformations which were determined by IPCT-measurements (Image Pattern Correlation Technique) on the real engine in operation.