Vibration Transmission Through Self-Aligning (Spherical) Rolling Element Bearings: Theory and Experiment

Royston, Thomas J.; Basdogan, Ipek

doi:10.1006/jsvi.1998.9999

Cited by 43 publications

(29 citation statements)

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“…A theoretical model for estimating the stiffness coefficients of spherical roller bearings was developed by Royston and Basdogan [8] showing that coefficient values are complicated functions, dependent on radial and axial preloads.…”

Section: Introductionmentioning

confidence: 99%

Simple and Versatile Dynamic Model of Spherical Roller Bearing

Ghalamchi

Sopanen

Mikkola

2013

International Journal of Rotating Machinery

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Rolling element bearings are essential components of rotating machinery. The spherical roller bearing (SRB) is one variant witnessing increasing use because it is self-aligning and can support high loads. It is becoming increasingly important to understand how the SRB responds dynamically under a variety of conditions. This study introduces a computationally efficient, three-degree-offreedom, SRB model that was developed to predict the transient dynamic behaviors of a rotor-SRB system. In the model, bearing forces and deflections were calculated as a function of contact deformation and bearing geometry parameters according to the nonlinear Hertzian contact theory. The results reveal how some of the more important parameters, such as diametral clearance, the number of rollers, and osculation number, influence ultimate bearing performance. One pair of calculations looked at bearing displacement with respect to time for two separate arrangements of the caged side-by-side roller arrays, when they are aligned and when they are staggered. As theory suggests, significantly lower displacement variations were predicted for the staggered arrangement. Following model verification, a numerical simulation was carried out successfully for a full rotor-bearing system to demonstrate the application of this newly developed SRB model in a typical real world analysis.

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Section: Introductionmentioning

confidence: 99%

Simple and Versatile Dynamic Model of Spherical Roller Bearing

Ghalamchi

Sopanen

Mikkola

2013

International Journal of Rotating Machinery

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“…[6][7][8] Fig. 4 shows a lumped mass finite element model that was simplified from the real structure by consolidating the complex structure above the granite.…”

Section: Dynamic Simulation Analysismentioning

confidence: 99%

“…5 shows the harmonic simulation results with various stiffness values and damping factors that have been used for the previous evaluations of stages at the APS. [6][7][8] Analytical simulation results show that, to achieve a 40% amplitude reduction, it may be necessary to apply a damping device with an over 20% damping coefficient and over 1e6 N/m of spring stiffness. Based on the experimental tests and analytical simulations, a damping device may be designed to have minimum spring stiffness of 1E6 N/m and at least a 20% damping ratio (loss factor=0.4) to achieve the desired vibratory response motion of 50 nm (rms) at the x-ray experimental sample holder.…”

Section: Dynamic Simulation Analysismentioning

confidence: 99%

Enhancement of the vibration stability of a microdiffraction goniometer

et al. 2002

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High-precision instrumentation, such as that for x-ray diffraction, electron microscopy, scanning probe microscopy, and other optical micropositioning systems, requires the stability that comes from vibration-isolated support structures. Structure-born vibrations impede the acquisition of accurate experimental data through such highprecision instruments. At the Advanced Photon Source, a multiaxis goniometer is installed in the 2-ID-D station for synchrotron microdiffraction investigations. However, ground vibration can excite the kinematic movements of the goniometer linkages, resulting in critically contaminated experimental data. In this paper, the vibration behavior of the goniometer has been considered. Experimental vibration measurements were conducted to define the present vibration levels and determine the threshold sensitivity of the equipment. In addition, experimental modal tests were conducted and used to guide an analytical finite element analysis. Both results were used for finding the best way to reduce the vibration levels and to develop a vibration damping / isolation structure for the 2-ID-D goniometer. The device that was designed and tested could be used to reduce local vibration levels for the vibration isolation of similar high-precision instruments.

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“…The bearing stiffness model ignored moment stiffness but focused on axial and radial translational stiffness and intercoupling stiffness. In addition, the tests proved the existence of a coupling stiffness coefficient in the stiffness matrix [5]. In 2000, scholars, including Lynagh and Rahnejat, subdivided a vibration model of bearings and considered the influence of the surface ripple and diameter of the rolling ball on the radial clearance of the bearing in the new model, which will accounted for some spectrum peaks in the spectrogram of the vibration signal of machine tool signals [6].…”

Section: Introductionmentioning

confidence: 98%

“…Dynamic characteristics of the bearing exert great influence upon that of the whole structure; thus, it is of great importance to study, identify, and construct the model of dynamic characteristic of bearings in a precise and theoretical way [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Identification of dynamic stiffness matrix of bearing joint region

Feng

et al. 2009

Front. Mech. Eng. China

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The paper proposes an identification method of the dynamic stiffness matrix of a bearing joint region on the basis of theoretical analysis and experiments. The author deduces an identification model of the dynamic stiffness matrix from the synthetic substructure method. The dynamic stiffness matrix of the bearing joint region can be identified by measuring the matrix of frequency response function (FRFs) of the substructure (axle) and whole structure (assembly of the axle, bearing, and bearing housing) in different positions. Considering difficulty in measuring angular displacement, applying moment, and directly measuring relevant FRFs of rotational degree of freedom, the author employs an accurately calibrated finite element model of the unconstrained structure for indirect estimation. With experiments and simulation analysis, FRFs related with translational degree of freedom, which is estimated through the finite element model, agrees with experimental results, and there is very high reliability in the identified dynamic stiffness matrix of the bearing joint region.

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Vibration Transmission Through Self-Aligning (Spherical) Rolling Element Bearings: Theory and Experiment

Cited by 43 publications

References 0 publications

Simple and Versatile Dynamic Model of Spherical Roller Bearing

Simple and Versatile Dynamic Model of Spherical Roller Bearing

Enhancement of the vibration stability of a microdiffraction goniometer

Identification of dynamic stiffness matrix of bearing joint region

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