Nonlinear dynamic investigations on rolling element bearings: A review

Sharma, Aditya; Upadhyay, Nitin; Kankar, Pavan Kumar; Amarnath, M.

doi:10.1177/1687814018764148

Cited by 53 publications

(40 citation statements)

References 114 publications

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“…A review of investigations of nonlinear dynamic on bearings with rolling element is presented in the research work [4].…”

Section: 2 Literature Reviewmentioning

confidence: 99%

Comprehensive Approach for Identification of Nonlinear Stiffness Characteristics of Bearing Supports for the Oxidizer Turbopump of the Liquid Rocket Engine

Pavlenko¹,

Demyanenko²,

Edl³

et al. 2018

JES

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This article dials with the refinement of the mathematical and computational models of the oxidizer turbopump rotor considering bearing gaps, axial preloading, compliance of the housing parts and the effect of rotation. The loading scheme consists of four substeps is proposed considering preliminary displacement of the outer cage, axial displacement as a result of the support deformation due to the axial preloading force, radial displacement due to the support deformation, as well as centrifugal forces of inertia caused by rotation of the rotor with an inner cage. Modelling of contacts interactions using ANSYS software is carried out according to the appropriate models of contact behaviour. The contact areas between the rolling elements, inner and outer cases are obtained. The contact angle is determined. Isosurfaces of axial and radial displacements for the bearing supports are built. Nonlinear stiffness of bearing supports is determined as the tangent of the angle of inclination for the curve "radial loadradial displacement". The proposed approach, which used for designing turbopump units for liquid rocket engines, will allow refining the reliable mathematical and computational models of rotor dynamics for turbopump units and providing appropriate computer simulation of forced oscillations of the rotor systems for given permissible residual imbalances considering nonlinear stiffness characteristics of bearing supports.

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“…A review of investigations of nonlinear dynamic on bearings with rolling element is presented in the research work [4].…”

Section: 2 Literature Reviewmentioning

confidence: 99%

Comprehensive Approach for Identification of Nonlinear Stiffness Characteristics of Bearing Supports for the Oxidizer Turbopump of the Liquid Rocket Engine

Pavlenko¹,

Demyanenko²,

Edl³

et al. 2018

JES

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“…In most the basic bearing models, the bearings will be represented with linear springs and dampers [2,3],enabling conventional modal analysis. However, due to the complexity of REBs, this is a gross simplification which has led to the introduction of a large range of more advanced bearing models [5], most of which are based on the quasi-static approach originally presented in [6].…”

Section: Introductionmentioning

confidence: 99%

A parametric study of an unbalanced Jeffcott rotor supported by a rolling-element bearing

2020

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Rolling-element bearings are widely used in industrial rotating machines, and hence there is a strong need to accurately predict their influence on the response of such systems. However, this can be challenging due to an interaction between the dynamics of the rotor and the bearing nonlinearities, and it becomes difficult to provide a physical explanation for the nonlinear response. A novel approach, combining a Jeffcott rotor supported by a detailed bearing model with the generalised harmonic balance method, is presented, enabling an in-depth study of the complex rotor-stator interaction. This allows the quasi-periodic response of the rotor, due to variable compliance, to be captured, and the impact of clearance, ring and stator compliance, and centrifugal loading of the bearing on the response to be investigated. A strongly nonlinear response was observed due to the bearing, leading to large shifts in frequency as the excitation amplitude was increased, and the emergence of stable and unstable operating regions. The variable compliance effect generated sub-synchronous forcing, which led to sub-resonances when the ball pass frequency coincided with the frequency of one of the modes. Radial clearance in the bearing had by far the largest influence on

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“…The number of rolling elements and their positions change in the load zone with the rotation of the bearing, resulting in a periodical variation of total stiffness of the bearing assembly. This variable stiffness further produces vibrations [10,11].…”

Section: Introductionmentioning

confidence: 99%

A Methodology for Analyzing Radial Ball Bearing Vibrations

Soldat

Mitrović

Atanasovska

et al. 2020

TFAMENA

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This paper presents the development of a methodology for calculating radial ball bearing vibrations. First, analytical and numerical models were developed and then, the obtained results were experimentally verified. In the experiment, a test rig for a dynamic testing of bearings subjected to an external load was used. Special attention was paid to the analysis of the total bearing deformations and stiffness, being the main parameters that define the dynamic behaviour of a bearing. In order to determine total deformations of a ball bearing as an assembly, a finite element model of the bearing was developed. The results obtained from the new methodology for a particular ball bearing type have been verified by experimental results. The obtained correlations of the experimental and the numerical results are about 2.5%. Based on the calculations and the experimental testing of the chosen ball bearing type, under conditions of a variable radial load, the analysis of the influence of the radial load on the dynamic behaviour of a ball bearing was performed. The analysis of the obtained results showed that the vibration amplitude increases with a similar multiple factor as loads increase.

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Nonlinear dynamic investigations on rolling element bearings: A review

Cited by 53 publications

References 114 publications

Comprehensive Approach for Identification of Nonlinear Stiffness Characteristics of Bearing Supports for the Oxidizer Turbopump of the Liquid Rocket Engine

Comprehensive Approach for Identification of Nonlinear Stiffness Characteristics of Bearing Supports for the Oxidizer Turbopump of the Liquid Rocket Engine

A parametric study of an unbalanced Jeffcott rotor supported by a rolling-element bearing

A Methodology for Analyzing Radial Ball Bearing Vibrations

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