Chaotic dynamics of cylindrical roller bearing supported by unbalanced rotor due to localized defects

Patra, Pravajyoti; Saran, V. H.; Harsha, S. P.

doi:10.1177/1077546320912109

Cited by 16 publications

(5 citation statements)

References 32 publications

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“…Wen et al 18 proposed a dynamic model with multiple DOFs and revealed the effects of outer raceway defects with different sizes and position angles on the dynamic behaviors of the bearing. Patra et al 19 considered a spall defect of a specific size on the outer race, the inner race, and rollers, respectively, in the bearing model to predict the characteristics of the discrete spectra and analyze the stability of the system. Patil et al 20 considered the cage slip in the proposed dynamic model for bearing with inner raceway or outer raceway defects.…”

Section: Introductionmentioning

confidence: 99%

A dynamic model of defective bearing considering the detailed motion of the roller and the impact between the roller and the cage

Yang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part K:

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To illustrate the vibration characteristics of the defective bearing more precisely, a dynamic model considering the detailed motion of the roller and the impact between the roller and the cage when the roller passes through the defect has been proposed. It overcomes the shortcomings of the previous models in which the roller's and cage's rotational speeds are set as constant values. The proposed model considers the detailed motion of the roller and the impact between the roller and the cage when the roller passes through the bearing defect. The validity and accuracy of the proposed model were verified by an experimental study. The motion characteristics, force characteristics, and vibration characteristics, when the roller passes through the defect, are analyzed. In addition, the vibration signals of the roller passing through two different types of defects are studied. The results show that the roller's rotational speed suddenly increases and the fluctuation amplitude of the revolution speed increases when the roller exits from the large defect. The large defect leads to high-frequency unstable collisions between the roller and the defective raceway. In addition, the slip velocity and the friction force between the roller and the raceway intensify the collision amplitude and generate high-frequency components of the vibration signal. They will also lower the frequency of the roller passing through the outer raceway, especially under high speed and light load conditions. The slipping and the restress between the roller and the defected raceway lead to small variations and big shocks in the vibration acceleration signal, respectively. These phenomena demonstrate the necessity of considering the detailed motion of the roller and the impact between the roller and the cage in the dynamic model.

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Section: Introductionmentioning

confidence: 99%

A dynamic model of defective bearing considering the detailed motion of the roller and the impact between the roller and the cage

Yang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part K:

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“…Various defects like cracks, pits and spalls, dents, scratches, bump flanking and fault size prediction are part of localized defects, while surface roughness, waviness, and misaligned races and offsized rolling element comes under distributed defects. 10,11,14,[16][17][18][19][20] Faulty design, improper installation, lack of lubrication, and heavy fatigue loading are responsible for the generation of localized defects, while the distributed defects are caused because of faulty design, manufacturing errors. 20 There is a great influence on vibration response due to the occurrence of faults in different parts of bearings.…”

Section: Introductionmentioning

confidence: 99%

Research progress on bearing fault diagnosis with localized defects and distributed defects for rolling element bearings

Patel

Shah

Khatri

et al. 2022

Noise & Vibration Worldwide

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In rotating machinery, rolling elements are the key members of the rolling element bearing (REB), which has tremendous application in automobiles, aerospace, ships, machinery apparatuses, and many more industrial sectors. Bearings are a significant source of various non-linear parameters which strongly affect the whole system. In the last two decades, tremendous research and approaches have been developed, considering the different parameters and faultiness for the proper understanding of the system’s non-linear behavior. This research paper summarizes the literature review on bearing fault diagnosis with localized and distributed defects for rolling element bearings with various non-linear parameters. Artificially-generated defects on the bearing races provides the vibration analysis of the system. These factors like radial clearance, unbalanced force, preload, misalignment, etc. are also considered defects in bearings. Moreover, the literature highlights some significant gaps that should be examined for future research in the condition monitoring of the mechanism.

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“…Rotating machines are widely used in turbomachinery, compressors, generators, and aero-engines etc. [1][2][3] In aero-engines, in order to obtain a higher thrust-toweight ratio, a dual-rotor system in which the lowpressure (LP) and high-pressure (HP) rotors coupled with inter-shaft bearing is widely adopted, as presented in Figure 1. In contrast to the single-rotor systems, dual-systems may introduce coupling vibrations and contain multiple frequency inputs.…”

Section: Introductionmentioning

confidence: 99%

Dynamic characteristics analysis of a dual-rotor system with bolted-disk joint

Wen

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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This article presents a nonlinear vibration characteristics study of a bolted joint dual-rotor system. The motion equations are derived through the lumped mass modeling method and a two-node bolted joint element. Nonlinear time-varying bending stiffness at the joint interface is considered in the numerical integration. Qualitative analysis of the effect of preload on system responses is conducted through changing the value of the transition point of bending stiffness of the bolted joint. Moreover, the transfer path of vibration in the dual-rotor system through inner-shaft bearing was discussed in the present work. The nonlinear differential equations are solved using the Newmark integration method to predict the dynamic characteristics of the dual-rotor system. The results show that the maximum vibration displacement of LP rotor is positively correlated with that of HP rotor as preload changes. Moreover, the maximum amplitude of the time-domain responses of the HP rotor will decrease and the minimum amplitude will increase with the increase of preload. The difference between the maximum and minimum values of the time-domain response will decrease with the increase of preload. This can be explained by the “stiffness hardening” phenomenon of the bolted joint. The research results can help understanding the dynamic properties of the bolted joint dual-rotor system and the vibration transfer path of the rotor system through inner-shaft bearing.

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Chaotic dynamics of cylindrical roller bearing supported by unbalanced rotor due to localized defects

Cited by 16 publications

References 32 publications

A dynamic model of defective bearing considering the detailed motion of the roller and the impact between the roller and the cage

A dynamic model of defective bearing considering the detailed motion of the roller and the impact between the roller and the cage

Research progress on bearing fault diagnosis with localized defects and distributed defects for rolling element bearings

Dynamic characteristics analysis of a dual-rotor system with bolted-disk joint

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