Dynamic modelling and vibration characteristics analysis for the bolted joint with spigot in the rotor system

Yu, Pingchao; Li, Lunxu; Guo, Chen; Yang, Mohan

doi:10.1016/j.apm.2021.01.028

Cited by 45 publications

(12 citation statements)

References 37 publications

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“…Angle is the azimuth of the bolt deviation, which is directly determined based on the structure and material [28,29]. According to a previous study [17], the anglefor a bolt connection region can be expressed as follows…”

Section: Equivalent Bending Stiffness Of Bolt Deviationmentioning

confidence: 99%

“…Yu established a nonlinear dynamic model considering the bending force of bolts under the action of an axial force, indicating that the critical speed distribution of the rotor is affected by the bolt connection [17]. Although the aforementioned studies have gradually expanded from structural performance to comprehensive manufacturing testing, many deficiencies still exist in the research of high-pressure rotor bolt assembly technology for service performance.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Prediction of bolt missing fault for multistage rotor by experimental test and analysis

CHI²,

Fan³

et al. 2022

Int J Adv Manuf Technol

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The high-pressure rotor of aero-engine is assembled by numerous bolts under high manufacture precision. The connected structure is subjected to both axial force and transverse vibration during service, which may result in individual bolt loosen. In this study, the influence of bolt missing on the dynamic characteristics is analyzed by numerical simulation. A test rig capable of impact and frequency sweeping experiment under axial tension was constructed. The vibration response features in the simulation were then extracted. The loss function of the mean absolute error and the decision method of extreme gradient boosting were used to predict the bolt missing position. The results show that the proposed model can reach a prediction precision of more than 90%. Moreover, the coefficient of determination evaluation index of the prediction effect reaches 0.9, which is significantly higher than those of other conventional models such as multivariate linear regression and multivariate adaptive regression spliness.

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Section: Equivalent Bending Stiffness Of Bolt Deviationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Prediction of bolt missing fault for multistage rotor by experimental test and analysis

CHI²,

Fan³

et al. 2022

Int J Adv Manuf Technol

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show abstract

“…Every pair of teeth generates a pair of contact areas. The rotor generally has a bow deformation which introduces the bending moment to the drums (Yu et al, 2021). Thus, the curvic-coupling is subjected to not only the axial preload applied by a rod but also the bending moment applied by drums.…”

Section: Analytical Model Of Curvic-couplingmentioning

confidence: 99%

“…Qin et al (2014) developed an analytical model to analyze the angular stiffness of the bolted joints and conducted comparative analysis between the analytical model and the finite element model. Yu et al (2021) considered the effect of the spigot on both the bolted joint stiffness and the rotor dynamic characteristics.…”

Section: Introductionmentioning

confidence: 99%

Modeling and dynamic analysis for rotors with curvic-coupling looseness

Liu

Zhou

Zhang

et al. 2022

Journal of Vibration and Control

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The joint structures, such as flanges with bolts and curvic-couplings, are commonly applied in aero-engine rotors. Those joints tend to loosen when subjected to heavy load, and the local deformation of the joints can induce nonlinearities to the rotor and further affect its dynamic characteristics. However, much research focuses on the bolted joint loosening, while the studies of curvic-coupling loosening in rotor systems are seldom reported. In this paper, the modeling and dynamics analysis for rotors with curvic-coupling loosening are performed. First, an analytical model is proposed to describe the nonlinear stiffness caused by looseness at the joint interface. Then, a rotor with curvic-coupling looseness is modeled and the related dynamic equations are derived. Finally, the modal characteristics of the rotor with curvic-coupling looseness are analyzed based on the complex nonlinear modes method, and the rotor’s steady-state response is obtained using numerical methods. The results show that the softening behavior introduced by joint looseness can lead to eigen frequency reduction in modal analysis, amplitude jump in response, and bifurcation around the critical speed. The above dynamic characteristics can provide reference for fault diagnosis in the rotor system with curvic-coupling loosening.

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“…At the connecting parts in the system, Li et al [20] established a dynamic model of the rotor system with bolt-disk connection. Based on the dynamic model, Yu et al [21] introduced the bolt joint model, which was used to study the dynamic characteristics of the bolt rotor. In addition, in order to explore the influence of the existence of friction on the rotor's self-selected speed and resonance characteristics, dual-rotor mathematical model that considered the friction coefficient and eccentricity between the stator and the rotor was established for the suspended rotor system [22].…”

Section: Introductionmentioning

confidence: 99%

Bearing Seat Vibration Modes Undergoing Unbalanced Excitation of Multirotating Drums

Tang

Wang

et al. 2021

Shock and Vibration

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Transmission modes of multiple rotating parts on combine harvester are complex and diverse, which resulted in large vibration and poor stability when the entire machine is harvesting. Aiming at the complex vibration problem of the combine harvester threshing system, this paper established the dynamic response model of the multidrum parallel system under different transmission modes and solved the vibration characteristics of the system. An experiment on the axial unbalance response of the parallel drum system under different transmission modes was carried out. The results show that the internal units of the threshing system form a whole through the transmission system, which causes the unbalanced response of the system to be superimposed on parallel threshing drums, thereby increasing the vibration amplitude. In addition, the change of the transmission mode will cause the vibration transmission path in the system to change greatly, and the boundary conditions of the system will be changed at the same time, which will eventually lead to the change of the unbalanced response characteristics.

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Dynamic modelling and vibration characteristics analysis for the bolted joint with spigot in the rotor system

Cited by 45 publications

References 37 publications

Prediction of bolt missing fault for multistage rotor by experimental test and analysis

Prediction of bolt missing fault for multistage rotor by experimental test and analysis

Modeling and dynamic analysis for rotors with curvic-coupling looseness

Bearing Seat Vibration Modes Undergoing Unbalanced Excitation of Multirotating Drums

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