Dynamic Characterization of Gas Turbine Blades During Validation Phase

This Master’s Degree Thesis focus is the Dynamic Characterization of a Gas Turbine Blade produced by Ansaldo Energia S.p.A in two different materials, in particular a first series made of material René 80 and one in Inconel IN792DS material. The blade is part of a single stage of a complete turbine that is used for energy production, with the specific blade in exam being part of the third-stage of the turbine part of the machine. Due to the different properties of the aforementioned materials, the associated behaviour will be different, resulting in a different Modal solution and a different vibrational pattern. The problem was accordingly studied by re-creating from the original model another FEM Model of the TB3 blade while assessing the differences and associated properties, simplifying the geometry and applying the needed modifications in order to investigate the discrepancies with the measured frequencies.