| Citation: | ZHOU Biao, XIE Chengyu, BATTIATO G, et al. Digital twins for dynamic testing of integral bladed disks[J]. Journal of Aerospace Power, 2025, 40（12）：20240027 doi: 10.13224/j.cnki.jasp.20240027
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The structural dynamics of integral bladed disks is very sensitive to the blade geometric variances. The methodological development and experimental verification for the high-fidelity digital twin modeling and high-performance dynamic analysis for blisks were presented by leveraging the advance optical geometry measurement technology. Firstly, the real blisk geometries were measured in the form of a high-resolution point cloud by employing a 3D structured blue light scanning system. The point cloud was directly correlated to the tuned blisk model in its nominal design. The high-fidelity digital twin model was constructed by an adaptive mesh deformation technique in an efficient way. Subsequently, high-performance dynamic analysis was realized by a novel model reduction technique specifically proposed for large-sized geometrically mistuned blisks. The basic idea was to construct the reduction mode basis of the full blisk by using the cyclic modes of the individual sectors with geometry mistuning having relatively low memory and computational time cost. The experimental verification results demonstrated that the high-fidelity digital twin model of the real blisk test piece can effectively capture the variations of sector frequencies and mode shapes due to the small blade geometry variances. Moreover, it also allowed to predict the mistuned responses of the rotating blisk under engine-order excitation.
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