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• W3080648097 abstract "Abstract Bearings are vital parts of many mechanical equipment, the vibration signal analysis of bearings with local defects is important in guiding the fault diagnosis. In this paper, a dynamic analysis method is proposed to investigate the vibration response of the deep groove ball bearings (DGBBs) with local defect using a new displacement excitation function based on the Hertz contact theory and Newton's second law. The DGBB is modeled as a two degrees-of-freedom system, and an additional friction force in the defect zone, the influence of centrifugal force, the gravity of rolling elements, and lubrication traction/slip force between rolling elements and raceway are considered. And this model is used to study the dynamic signals of DGBB under different fault sizes and rotation speeds. Results indicate that the simulation signal has many continuous impacts and change over the time which is closer to the actual situation compared with the one-shot impulse function such as rectangular or half-sine or piecewise function when the rolling elements passed through the defect zone. Finally, the validity of the proposed model is verified by experiments. The simulated and experimental results indicate that the proposed model would achieve a more appropriate and accurate dynamic simulation." @default.
• W3080648097 created "2020-09-01" @default.
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• W3080648097 date "2020-09-21" @default.
• W3080648097 modified "2023-10-15" @default.
• W3080648097 title "Vibration Analysis of Deep Groove Ball Bearings With Local Defect Using a New Displacement Excitation Function" @default.
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• W3080648097 doi "https://doi.org/10.1115/1.4048163" @default.
• W3080648097 hasPublicationYear "2020" @default.
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