Bolt loosening at rotating joint interface and its influence on rotor dynamics
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- 作者：Zhaoye Qin ; qinzy@mail.tsinghua.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Qinkai Han ; Fulei Chu
- 关键词：Bolt loosening ; Rotating joint interface ; Drum rotor ; Time-varying stiffness ; Finite element
- 刊名：Engineering Failure Analysis
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：59
- 期：Complete
- 页码：456-466
- 全文大小：1878 K
文摘
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Time varying stiffness due to rotating bolt loosening is studied by 3D FE analysis.
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Time varying stiffness matrix is incorporated into the rotor dynamic model.
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HBM is used to calculate the rotor response with bolt loosening.
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Stiffness variation trend of bolt loosening resembles breathing transverse crack.
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Peaks at forward and backward whirling critical and subcritical speeds are excited.