Antifriction bearing surface damage fault dynamics modeling method

Abstract

The invention discloses an antifriction bearing surface damage fault dynamics modeling method, comprising the following steps: 1) on the basis of obtaining antifriction bearing contact equivalent stiffness and equivalent damping, considering antifriction bearing clearance and variation of a supporting region, establishing an antifriction bearing spring damping vibration model; 2) respectively loading impulse functions of surface damage fault points on an outer ring, an inner ring, and a rolling element, respectively establishing an antifriction bearing outer ring fault model, an antifriction bearing inner ring fault model, and an antifriction bearing rolling element fault model. The impulse functions of the surface damage fault points are respectively loaded on the outer ring, the inner ring, and the rolling element, and the antifriction bearing outer ring fault model, the antifriction bearing inner ring fault model, and the antifriction bearing rolling element fault model are established, the models meet actual conditions better, and calculated results are more accurate.

Description

technical field [0001] The invention relates to a rolling bearing fault dynamics modeling method, in particular to a rolling bearing surface damage fault dynamics modeling method. Background technique [0002] One of the main reasons for the poor application effect of rolling bearing fault diagnosis is the lack of research on rolling bearing fault mechanism. Establishing an effective and practical rolling bearing fault dynamics model is the key to the study of rolling bearing fault mechanism and the technical basis for rolling bearing fault diagnosis. [0003] Aiming at the problem of rolling bearing fault dynamics modeling, many scholars have carried out fruitful research. Based on the theoretical model of unilateral contact and elastohydrodynamic lubrication, Zhang Yuan et al. analyzed the response characteristics of point defect rolling bearings, and established a dynamic model of point defect rolling bearings by using the multi-body dynamics method. Xu Dong et al. esta...

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Problems solved by technology

However, the dynamic modeling of rolling bearing faults fails to effectively integrate the fault impact into the nonlinear dynamic equation of rolling bearings. At the same time, the calculation results of the rolling bearing fault model are quite different from the simulation and experimental results, which cannot be well applied to the fault diagnosis of rolling bearings.

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