An integrated model to predict vibration response of rolling bearing to localized defect and grd assessment

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (9) : 35-39.

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An integrated model to predict vibration response of rolling bearing to localized defect and grd assessment

Yuan Xing1; Zhu Yong-sheng1; Hong Jun2; Zhan You-yun1

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Abstract

In the previous bearing models, vibration characteristics have a larger error compared with the practical project because of neglecting the impact of pedestal and rolling element. A novel prediction model has been developed to obtain the vibration response due to localized defect of bearing system in order to solve the problem. In the analytical formulation, the contacts between the rolling elements and the races are considered as non-linear springs. The contact force is calculated using the Hertzian contact deformation theory and the bearing system is modeled as multi-degrees-of-freedom system. The implicit type numerical integration technique Runge–Kutta method is used to solve the non-linear differential equations iteratively. A computer program is developed to simulate surface defects of the components. Then grey incidence degree (GRD) is employed to investigate the Condition assessment based on hybrid features obtained from the novel model. The new technique is experimentally evaluated using vibration signals measured on rolling bearings system that contain localized defects, and good results were obtained that verified the validity and effectiveness of this paper.

Key words

rolling bearing / localized defect / integrated prediction model / grey incidence degree (GID)

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Yuan Xing;Zhu Yong-sheng;Hong Jun;Zhan You-yun. An integrated model to predict vibration response of rolling bearing to localized defect and grd assessment[J]. Journal of Vibration and Shock, 2011, 30(9): 35-39