Abstract
Long service time and excessive vibration of aero-engine will cause failure of clamps, which usually fix pipelines on the outside of an aero-engine. In this paper, the nonlinear vibration characteristics caused by loosening clamps in aero-engine pipeline are determined. According to the real parameters of an aero-engine clamp-pipeline test rig, the clamp is simplified into a nonlinear spring-damping. Thus, a clamp-pipeline nonlinear model based on cubic stiffness is established. The multi-scale method is used to obtain the analytical solution of the nonlinear model. Based on the real test data, the model parameters of the clamp-pipeline nonlinear system are identified, and then the nonlinear vibration characteristics of the system are obtained. Finally, using the vibration transmissibility method, the influence of the severity of clamp loosening on the nonlinear vibration characteristics of the system is obtained.
Highlights
The pipelines system is an important external accessory to ensure normal operation of an aero-engine
Quyang et al [10] analyzed a clamp-pipeline system using modal analysis methods, and the results showed that the longer the pipeline length between two clamp supports, the higher the resonance frequency of the pipeline
This paper aims at the structure of an aero-engine clamp-pipeline system, based on the assumption that the pipe itself is rigid, and the stiffness of loosening clamp is nonlinear
Summary
The pipelines system is an important external accessory to ensure normal operation of an aero-engine. The determination of the nonlinear stiffness characteristics of the system requires further analysis
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
