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个人信息Personal Information
副教授
硕士生导师
性别:男
毕业院校:东北大学
学位:博士
所在单位:机械工程学院
办公地点:知方楼7051
电子邮箱:zhaijy@dlut.edu.cn
Vibration reduction of the blisk by damping hard coating and its intentional mistuning design
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论文类型:期刊论文
发表时间:2019-01-01
发表刊物:AEROSPACE SCIENCE AND TECHNOLOGY
收录刊物:SCIE、Scopus
卷号:84
页面范围:1049-1058
ISSN号:1270-9638
关键字:Mistuned blisk; Damping hard coating; Vibration reduction; Intentional mistuning design
摘要:This paper presents a vibration reduction approach of the blisk by using of the damping hard coating and its intentional mistuning design. Firstly the amplified forced vibration responses of mistuned blisk were studied based on the reduced order finite element model (FEM) established by component mode synthesis (CMS) method, by using the actual mistuning value of a blisk specimen. Then the effects of damping hard coating on forced vibration responses of the tuned and mistuned blisk were investigated. Further, intentional mistuning design by depositing hard coating with different thickness on blades was researched, after comparing several mistuning patterns. At last, experiment research was conducted by using a blisk specimen with random mistuning. NiCrAlY coating was deposited on blades with designed thickness, in accordance with the simulation results. It reveals to be an effective approach for reducing the vibration level of mistuned blisk, judging from the observed lower vibration response level after the intentional mistuning design by hard coating. The results of this paper can help to decrease the fatigue failure induced by mistuned vibration and improve the structure integrity and security of the blisk in aero-engine. (C) 2018 Elsevier Masson SAS. All rights reserved.