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国外文献 > 1.轴承 > 5. 监测与诊断 > 状态监测

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标 题： A comprehensive evaluation of the effect of defect size in rolling element bearings on the statistical features of the vibration signal
对滚动轴承中缺陷尺寸对振动信号统计特征影响的全面评估
作 者： Bastami, Abbas Rohani
Vahid, Sima
关键词： Rolling element bearing  [滚动轴承]
Defect size  [ 缺陷尺寸]
Statistical features  [ 统计特征]
Fault diagnosis  [ 故障诊断]
Vibration  [ 振动]
Condition monitoring  [ 状态监测]
出版年： 2021
期刊名： Mechanical Systems & Signal Processing
机械系统与信号处理
年卷期： 2021, vol.151
摘 要： A defective rolling element bearing produces a specific vibration pattern that can be used as a diagnostic tool in predictive maintenance. Defect growth from an incipient fault to a fully developed fault alters the vibration pattern significantly. Changes in the statistical features of the acceleration as the defect grows can provide useful information in degradation assessment. The purpose of this paper is to study the trend of the important statistical features in terms of defect size. A physical model with the ability of modeling naturally developed defects has been used for the simulation of the generated vibrations in the rolling element bearings. Defects on the outer race, inner race and rolling element have been considered separately. The vibration signals have been obtained numerically from the model and their statistical features have been calculated for different defect sizes. The behavior of the statistical features including rms, peak, crest factor, kurtosis and level crossing rate have been studied thoroughly and simple relations between the defect size and vibration features have been proposed. Level crossing rate is introduced as a useful feature in the condition monitoring of rolling element bearings. Experimental data of a bearing with a natural defect have been measured using an accelerometer in a test and used to validate the results. (C) 2020 Elsevier Ltd. All rights reserved.

缺陷滚动轴承会产生特定的振动模式，该模式可作为预测性维护中的诊断工具。从初期故障发展为完全发展的故障时，其振动模式会发生显著变化。随着缺陷增长，加速度的统计特征发生变化，这些变化可为劣化评估提供有用信息。本文旨在研究与缺陷尺寸相关的关键统计特征的变化趋势。采用具备模拟自然形成缺陷能力的物理模型，对滚动轴承中产生的振动进行仿真分析。分别考虑了外圈、内圈和滚动元件上的缺陷。通过数值方法从模型中获取振动信号，并针对不同缺陷尺寸计算其统计特征。深入研究了均方根值（rms）、峰值、峰度因子、偏度以及跨域率等统计特征的行为，并提出了缺陷尺寸与振动特征之间简单的数学关系。通过加速度计在试验中测量了具有自然缺陷的轴承的实验数据，用于验证结果。该方法被引入作为滚动元件轴承状态监测中的一个有用功能。（C）2020 Elsevier Ltd. 保留所有权利。
中文内容为网络AI翻译，专业术语未必准确，仅供参考。

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