A great deal of research has been conducted on accurately modeling large cyclic structures
such as turbomachinery rotors. Accurate modeling of realistic industrial turbomachinery
requires overcoming several challenges. The first is the excessively large size of the finite
element models (FEMs) needed, which can contain millions of degrees of freedom per stage
of the rotor. The second challenge is the presence of small random variations in the
structural properties known as mistuning, which arise from operational wear and/or …