Title of Paper:Reliability analysis of engine blade under varied environment with competing risk model

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Affiliation of Author(s):民航学院

Journal:Hangkong Dongli Xuebao

Abstract:The complicated working condition results in the existence of multiple failure modes in aero-engine blade, and the failure rate of those failures is closely related with the operating environment, so, it is difficult to analyze the reliability of engine blades and control its risk. To solve the problem, firstly, based on the characteristics of wear and thermal crack failure modes commonly existing in rotor blades, the wear and thermal crack failure models with variable environment were researched, respectively. Secondly, a reliability analysis method based on competing risk model for rotor blades was proposed, and the corresponding algorithm was given. Finally, a high pressure turbine(HPT) rotor blade was analyzed and studied as an example. And the result showed that the risk was higher under single failure model compared with the competing risk model. When the competing risk model was employed in the reliability analysis, if the impact of thrust was not considered, the risk increased by 33% given the unreliability of 0.1, verifying the practicability of the proposed method. © 2017, Editorial Department of Journal of Aerospace Power. All right reserved.

ISSN No.:1000-8055

Translation or Not:no

Date of Publication:2017-02-01

Co-author:李鑫,Xiao, Luo-Chun,Chen, Kang,Su Yan

Correspondence Author:Cai jing