Bolt loosening at rotating joint interface and its influence on rotor dynamics

Qin, Zhaoye; Han, Qunying; Chu, Fulei

doi:10.1016/j.engfailanal.2015.11.002

Cited by 164 publications

(72 citation statements)

References 15 publications

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“…Assume that the amount of ICEs in the status of stick is m, the bending moment M can be deducted by combining the three Eq. (6), (7), and (8) as…”

Section: Mechanism Of Hysteresismentioning

confidence: 99%

See 1 more Smart Citation

Dynamic Characteristics of the Flange Joint with a Snap in Aero-Engine

Liu¹,

Wang²,

Chen³

2018

IJAV

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As an important component in aero-engine, the stiffness of the flange joint has a direct impact on vibration characteristics. The paper studies the stiffness characteristics of the flange joint which includes a snap by nonlinear transient analysis in ANSYS. The angle of rotation-load curves under harmonic transverse load are obtained. It is discovered that there are different routes of curves in the process of uploading and unloading, and that the curves form a closed cycle, which is called hysteresis loop. Then, the paper also analyses the hysteresis's generation mechanism and the influence of joint parameters -preload of bolts and interference of the snap -on the shape and area of hysteresis loop. Finally, a model, which is comprised of the three-dimension finite element (namely, the joint) and beam element, is built to study the influence of hysteresis on vibration. The results show that the hysteresis of joint can be aroused under the circumstance of certain vibration amplitude and that the hysteresis can rapidly accelerate the amplitude attenuation by the mean of energy dissipation. The research results can be applied to vibration suppression design of aero-engine. NOMENCLATUREICE Infinitesimal Contact Element. Fcr Critical Force.

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“…Assume that the amount of ICEs in the status of stick is m, the bending moment M can be deducted by combining the three Eq. (6), (7), and (8) as…”

Section: Mechanism Of Hysteresismentioning

confidence: 99%

“…6 Qin studied the Bolt loosening at rotating joint interface and its influence on rotor dynamics. 7 These researches do not take into consideration the influence of a snap on the stiffness of joint, and assume the stiffness is constant. In fact, the stiffness and contact status of the joint do vary with the loading's fluctuation.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics of the Flange Joint with a Snap in Aero-Engine

Liu¹,

Wang²,

Chen³

2018

IJAV

View full text Add to dashboard Cite

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“…Qin et al [11] developed the finite element models to predict dynamic characteristics of rotating bolted disk-drum type rotors.…”

Section: Introductionmentioning

confidence: 99%

Rotor-Dynamic Analysis of a Small Steam Turbine Using Finite Element Method

Parlak¹,

Taplak²

2020

MMEP

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Turbine rotors have complex geometry that is difficult to determine their dynamical behaviour. Strong approaches like finite element methods is used to analyze the small steam turbine system to eliminate difficulty of complex geometry problems. Finite element method saves time by allowing reductions in equations beside it is possible to obtain faster solutions by using software that can solve these equations. In this paper, rotor-dynamic analysis of a small steam turbine rotor with certain geometrical and mechanical properties was performed and critical speeds, modal shapes and Campbell diagram of the system was obtained by using FEM based Dynrot software.

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“…Furthermore, the nonlinear response term in the photoelectric theodolite affects the stability of the optical system and the reliability of the measured data [2][3][4][5][6]. Therefore, it is necessary to further analyse the response of actual mechanical structure system of the photoelectric theodolite [7].…”

Section: Introductionmentioning

confidence: 99%

Experiment on Nonlinear Response Characteristics of Photoelectric Theodolite under Servo Driven

Yu¹,

Wang²,

Xie³

et al. 2017

Proceedings of the 3rd Annual International Conference on Mechanics and Mechanical Engineering (MME 2016)

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Abstract. The dynamic response characteristics of the structure are affected by the nonlinear term in the theodolite structure with supporting shaft and bolt fixed connection. The harmonic term caused by nonlinear response has important influence on the measurement accuracy of optical system and the tracking stability of servo system. The harmonic response term is obvious by analysing the experiment data. The experimental study on the excitation of the cantilever beam model which fixed by single bolt shows that the nonlinear harmonic response is one of the source of the nonlinear dynamic characteristics of the system, and the harmonic response is much more obvious under special excitation condition

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Bolt loosening at rotating joint interface and its influence on rotor dynamics

Cited by 164 publications

References 15 publications

Dynamic Characteristics of the Flange Joint with a Snap in Aero-Engine

Dynamic Characteristics of the Flange Joint with a Snap in Aero-Engine

Rotor-Dynamic Analysis of a Small Steam Turbine Using Finite Element Method

Experiment on Nonlinear Response Characteristics of Photoelectric Theodolite under Servo Driven

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