This example problem demonstrates the free vibration and forced-response analyses of a tuned and mistuned NASA Rotor 67 fan using cyclic modeling methods, linear perturbation, and aerocoupling solution approaches.

The problem includes modal analyses, prestressed modal analyses using linear perturbation, and prestressed mode-superposition harmonic analyses using linear perturbation. Pressures acting on the model because of unsteady flow are imported from Ansys CFX.

The results of the cyclic symmetry analysis are verified against reference results obtained from an analysis of the full 360° model.