Analytical Modeling and Vibration Analysis of Hard-Coated Splitter Blisk

doi:10.12068/j.issn.1005-3026.2019.02.018

Abstract

Abstract: The blades were coated with NiCoCrAlY+YSZ， then the dynamic model and vibration characteristics of the hard-coated splitter blisk were investigated， as well as the effect of hard coating on damping vibration reduction of the splitter blisk. Firstly， analytical model of the hard-coated splitter blisk was obtained using the complex modulus and the Oberst beam theories. The mode characteristics and forced responses of the hard-coated splitter blisk were then solved using the Gram-Schmidt process and Rayleigh-Ritz method. The results reveal that hard coating has a weak effect on natural frequencies of splitter blisk but makes the modal loss factors increase about four times， which explains that hard coating can effectively improve the damping performance of the splitter blisk. Moreover， the forced response can be suppressed remarkably.

Key words: splitter blisk, hard coating, passive vibration reduction, analytical modeling, forced response

CLC Number:

GAO Feng， SUN Wei， NI Chen-bing. Analytical Modeling and Vibration Analysis of Hard-Coated Splitter Blisk[J]. Journal of Northeastern University Natural Science, 2019, 40(2): 244-250.

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