Control of mistuning level using hard coating for blisks based on mistuning identification technique

Xu, Kui; Yan, Xianfei; Du, Dongxu; Sun, Wei

doi:10.1016/j.ast.2021.106526

Cited by 8 publications

(2 citation statements)

References 44 publications

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“…The application of hard coatings in the existing literature mostly focuses on simplifying coated discs [5][6][7][8][9][10][11][12][13][14][15], straight blades [16][17][18][19][20][21], plates [22][23][24][25][26], thin shells [27][28][29][30], and disk drums [31]. Yan et al [5] proposed using virtual layers to simulate changes in coating thickness and analyzed the impact of coating thickness on the natural frequency and forced response of actual disks.…”

Section: Introductionmentioning

confidence: 99%

“…They used the energy-based finite element method and Newton Raphson method to conduct nonlinear dynamic modeling and forced vibration analysis of the HC disk. Xu et al [10] presented a novel method based on the mistuning identification technique to detect the blade substrate crack parameters for the hard-coated blisk. Xu et al [11] investigated a new, equivalent, finite element modeling method based on mistuning identification.…”

Section: Introductionmentioning

confidence: 99%

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Vibration Analysis and Damping Effect of Blade-Hard Coating Composite Structure Based on Base Excitation

et al. 2023

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Hard coatings are widely employed on blades to enhance impact resistance and mitigate fatigue failure caused by vibration. While previous studies have focused on the dynamic characteristics of beams and plates, research on real blades remains limited. Specifically, there is a lack of investigation into the dynamic characteristics of hard-coated blades under base excitation. In this paper, the finite element model (FEM) of blade-hard coating (BHC) composite structure is established based on finite element methods in which the hard coating (HC) material and the substrate are considered as the isotropic material. Harmonic response analysis is conducted to calculate the resonance amplitude of the composite under base excitation. Numerical simulations and experimental tests are performed to examine the effects of various HC parameters, including energy storage modulus, loss factors, coating thickness, and coating positions, on the dynamic characteristics and vibration reduction of the hard-coated blade composite structures. The results indicate that the difference in natural frequency and modal loss factor of blades increases with higher storage modulus and HC thickness. Moreover, the vibration response of the BHC decreases with higher storage modulus, loss factor, and coating thickness of the HC material. Blades with a complete coating exhibit superior damping effects compared to other coating distributions. These findings are significant for establishing accurate dynamic models of HC composite structures, assessing the effectiveness of HC vibration suppression, and guiding the selection and preparation of HC materials.

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