Fig. 1 Schematic illustration of substructuring approach More

Fig. 2 Finite element model of academic blisk's initial sector with blade (light gray), disk sector (dark gray), and simulated measured degree-of-freedom (red dot). The disk sector contains 836 and the blade 1250 C3D20 elements leading to a total of 33,432 nodal degrees-of-freedom. More

Fig. 3 (Top) Dispersion diagram of the academic blisk; (bottom) zoom 1F mode family More

Fig. 4 Frequency response data of 2EO resonance crossing used as identification input, with tuned response (black dotted line) for comparison More

Fig. 5 (Top) Identified mistuning factors for 1F mode family; (bottom) relative errors More

Fig. 6 Measured DOFs on the industrial blisk (red dots) More

Fig. 7 (Top) Dispersion diagram of the industrial blisk; (middle) zoom 3T mode; (bottom) zoom 1C mode More

Fig. 8 Input frequency responses of DOF 1 for resonance crossing of 3T mode family with 2EO More

Fig. 9 Identified mistuning factors for 3T mode family, using response of 5 DOFs on each blade, 1 DOF on each blade, and 1 DOF on only 20 of the 26 blades More

Fig. 10 Reconstructed frequency response versus input for resonance crossing of 3T mode family with 2EO: best residual DOF 1 More

Fig. 11 Reconstructed frequency response versus input for resonance crossing of 3T mode family with 2EO: worst residual DOF 1 More