Nowadays, the aerospace industry is actively working to reduce its environmental impact and improve the sustainability. A particular focus is placed on engines, which obviously play a crucial role in achieving these goals. The overall engine's improvement, in terms of both efficiency and weight, is achievable through the optimization of each of its components, including the Low Pressure Turbine (LPT). However, the optimization process requires a significant effort in terms of computational cost associated to aerodynamic and structural analyses. In particular, the dynamic analyses have become one of the priorities, since that lighter structures are more susceptible to high cycle fatigue failures due to vibrations.