| Citation: | FAN Yu, LI Hemu, LI Anlue, et al. Using antiresonant frequency in the identification of blisk mistuning[J]. Journal of Aerospace Power, 2025, 40（4）：20240506 doi: 10.13224/j.cnki.jasp.20240506
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An integrally bladed disk under the influence of mistuning would produce a response amplification phenomenon that might lead to high-cycle fatigue damage. To accurately predict the dynamic characteristics of the mistuned bladed disk, the mistuning modes should be precisely identified. A mistuning identification method based on the anti-resonance characteristics of the bladed disk was proposed, which provided a new solution to the mistuning identification problem. With this method, the mistuning amount of the blade was obtained by measuring the anti-resonance peaks of the bladed disk. The cantilever frequencies of the blades were characterized by the anti-resonance peak, which was independent of the main structure. The new method was less affected by the coupling between sectors, and had higher theoretical identification accuracy. This method focused on exploring the influence of variations in the position of measurement points and excitation points on the frequencies of anti resonance peaks. The identification mechanism simulation and experimental verification were carried out on a flat bladed disk with higher identification difficulty, and the error in the simulation was reduced by 37.48% compared to existing identification methods. When applying this method to a real bladed disk model, the identified modulus mistuning pattern was basically consistent with the true value.
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