AN ADAPTIVE PERTURBATION SCHEME FOR THE ANALYSIS OF MISTUNED BLADED DISKS

In this paper, a novel perturbation technique is introduced for the de termination of the forced vibration response of mistuned bladed disks. The proposed technique is adaptive in the sense that the level of app roximation cart be varied at will to accommodate any specificities of the tuned system and/or of the existing mistuning. This versatility of the proposed approach not only guarantees the reliability of the comp uted response but also lends to an excellent compromise between accura cy and computational effort. Numerical results are presented that demo nstrate both the reliability of the computed response and the computat ional saving obtained by relying on the suggested perturbation techniq ue as opposed to a straightforward steady-state analysis.