This thesis, developed in collaboration with Avio Aero, investigates the fidelity of structural dynamics simulations by focusing on a simplified “dummy” bladed-disk model and comparing theoretical solutions with results from ANSYS Mechanical APDL and the corporate tool @Forced. We conducted modal analysis and a brand-new linear forced response with cyclic symmetry capability in ANSYS to evaluate accuracy against theoretical references. The numerical model was constructed to ensure consistent geometry, material properties, boundary conditions, meshing strategy, and solver settings, isolating differences attributable to element formulations and algorithmic implementations. Validation includes mesh-convergence and solver-sensitivity studies across mode shapes, natural frequencies, damping assumptions, and frequency response functions.