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Modeling and Identification Method of Bolt Loosening of Joint Surface under Axial Tension of Multistage Disk-Drum Rotor
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Logistics Engineering College, Shanghai Maritime University, Shanghai, 201306, China
AECC Commercial Aircraft Engine Co. LTD, Shanghai, 200241, China
SPIC Beijing Gas Turbine Energy Technology Development Co.LTD, Beijing, 100000, China
Submission date: 2023-02-05
Final revision date: 2023-02-22
Acceptance date: 2023-04-27
Online publication date: 2023-05-05
Corresponding author
Cong Yue   

Logistics Engineering College, Shanghai Maritime University, Shanghai, 201306, China
Eksploatacja i Niezawodność – Maintenance and Reliability 2023;25(2):165779
  • Connection characteristics of bolt screwing in the multi-exciting environment.
  • An equivalent stiffness model analyses the effect of stiffness loss of joint surface with bolt missing.
  • This method considers the influence of bolts at different locations on the stiffness loss.
  • Multi-period excitation vibration experiment.
  • Correlation coefficient evaluates the identification effect of different measuring points.
Individual bolt at key connection positions is prone to loose when the engine is cycle-operating under complex loads. A joint surface equivalent stiffness model is derived and developed based on the connection characteristics of bolt screwing in the multi-exciting environment of the high pressure rotor. The model is used to analyze the effect of bolt missing at circumferential positions with the equivalent stiffness loss. Vibration experiments under both axial force and lateral impact were carried out to obtain the dynamic response feature of the multistage disk-drum simulated rotor with missing one bolt at different positions. The Spearman correlation coefficient was applied to evaluate the identification effect of different measuring points on the bolt loosening position. The study shows that the eigenfrequencies of experimental results have a consistent trend with the equivalent stiffness variation caused by single bolt missing model. This method also provides a theoretical basis for the detection of bolt deviation position with multi-exciting vibration detection.
The authors would like to thank Huashan Chi and Jianyu Fan for their help in experiment. The authors gratefully acknowledge the financial support for this project from the National Natural Science Foundation of China Youth Fund, grant number 5220511.
Rotor Vibration Characteristics Considering Nonlinear Stiffness of Spigot Bolts
Xiangxiang Shen, Guo Chen
Journal of Vibration Engineering & Technologies
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