Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (11): 1624-1629.DOI: 10.12068/j.issn.1005-3026.2018.11.021

• Mechanical Engineering • Previous Articles     Next Articles

Dynamic Analysis of the Hard-Coating Mistuned Blisk Using ROM

GAO Feng1,2, SUN Wei1,2, FAN Yun-fei1,2   

  1. 1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China; 2. Key Laboratory of Ministry of Education on Vibration and Its Control of Aerospace Power Equipment, Northeastern University, Shenyang 110819, China.
  • Received:2017-08-21 Revised:2017-08-21 Online:2018-11-15 Published:2018-11-09
  • Contact: SUN Wei
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Abstract: A damping vibration reduction method with depositing hard coating on blades was proposed, and a mistuned blisk with NiCoCrAlY+YSZ hard coating deposited was taken as example for numerical calculation. Firstly, the reduced-order model (ROM) of the hard-coating mistuned blisk was established by the improved fixed interface component modal synthesis method (Fixed-ICMSM), then the vibration characteristics were calculated. Subsequently, the influences of hard coating were studied toward vibration characteristics of the mistuned blisk. Next, the influence of the coating thickness was studied particularly toward damping capacity of mistuned blisk. The results revealed that the NiCoCrAlY+YSZ hard coating has little effect on natural frequencies and good effect on damping. Also, the resonant response of the mistuned blisk can be suppressed remarkably, by the hard coating.

Key words: mistuned blisk, hard coating, reduced-order model(ROM), coating thickness, damping capacity

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