| Citation: | ZHOU Biao, XIE Chengyu, BATTIATO G, et al. Forced vibration test and accurate response prediction of rotating blisk[J]. Journal of Aerospace Power, 2025, 40（4）：20240505 doi: 10.13224/j.cnki.jasp.20240505
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This research focused on the forced vibration test of a rotating blisk in the laboratory condition, as well as its accurate dynamic modeling and forced response prediction. The method for accurate dynamic modeling and forced response prediction of a mistuned blisk test piece was developed based on the blade detuning tests. The forced vibration test of the rotating blisk was carried out in the laboratory condition. A set of magnetic units were employed to produce the simulated engine-order excitations. The non-contact force imposed onto the rotating blades can be measured and proceeded in order to provide inputs for the forced response prediction. Benefitting from the all-blade vibration measurement capability of the blade tip-timing (BTT) technique, a correlation analysis was performed between the measured and predicted response of the rotating blisk. The results revealed that the mistuned blisk model, which was constructed through the blade detuning tests for the blisk at rest, could predict the forced responses of the rotating blisk under engine-order excitations with high accuracy. Specifically, the modal assurance criterion used to quantitatively correlate the spatial distribution of the measured/predicted blade amplitudes at typical resonances was generally greater than 0.96. The difference between the averaged bladed amplitudes extracted from the measured/predicted responses at typical 1T blade mode resonances fell below −5.8%.
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