A New Model for Estimating Vibrations Generated in the Defective Rolling Element Bearings

Abstract

Prediction of the vibration response due to defects on rolling element bearings requires having an accurate representative vibration model. In this paper, a new model for vibration generation in the rolling element bearings has been introduced. The proposed model assumes a stochastic source of vibration excitation, which is produced as a result of metallic contact between bearing elements during rolling. This model explains high frequency vibration in the acceleration spectrum clearly. When a defect grows in the bearing, the roughness of the contacting surfaces increases locally and stochastic excitation becomes stronger in the defective area. The increased vibration level at the defective area is a good indicator of bearing faults. A numerical simulation of the proposed model was validated with experimental results.

Monitoring of distributed defects on HSM spindle bearings

“…In the example, the primary bearing-induced frequency was in the low-frequency part of the spectra and masked by gear-mesh harmonics and sidebands. The author revealed the bearing-induced frequency by computing cyclic coherences and, besides, he suggested that a Gaussian noise can be included in the model.Behzad et al [16] published a very interesting approach in relation to the present topic of this paper. The proposed model assumes a stochastic source of vibration excitation, which resultsfrom metallic contact between bearing elements during rolling.…”

“…The proposed model assumes a stochastic source of vibration excitation, which resultsfrom metallic contact between bearing elements during rolling. It is inspired from Feldmann [17] who introduced a microscale surface roughness model, based on an elastic rough contact models with a pseudo-random distribution of the contact points, which produces a broadband random noise during the ball rolling process.Behzad et al [16] A monitoring system and a specific protocol have been established and implemented in aerospace industry, in order to evaluate the criterion on spindles under realistic conditions. Finally, the relevancy of SBN is studied by comparison with four classical criteria, depending on three required conditions for bearing monitoring.…”

A new method for detection of rolling bearing faults based on the Local Curve Roughness approach

“…A more complete model of vibration generation in the rolling bearings is introduced in [29]. A numerically-generated vibration signal of a 50 Hz frequency machine with healthy and faulty bearings is shown in Fig.…”

Modelling and vibration analysis of machine tool spindle system with bearing defects

“…Nakhaeinejad and Bryant (2011) proposed a dynamic model of rolling bearing with surface defects using bond graph method. Behzad et al (2011) assumed a stochastic source of vibration excitation and proposed a new model for vibration generation in the rolling element bearings. Kankar et al (2012) used Hertzian contact theory to calculate the contact force and proposed a dynamic model to study the localised defects.…”