滚动轴承支承下的转子碰摩故障动力分析、特征提取与智能诊断

李飞敏; 陈果; 侯佑平

滚动轴承支承下的转子碰摩故障动力分析、特征提取与智能诊断

南京航空航天大学民航学院, 南京 210016

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- 文章访问数: 2006
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- 被引次数: 0
出版历程
- 收稿日期: 2006-10-30
- 修回日期: 2007-03-10
- 刊出日期: 2007-11-28

Dynamics analysis,feature extraction and intelligent diagnosis for rubbing fault of rotor supported on bull bearings

College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

摘要

摘要: 针对滚动轴承支承下的转子碰摩故障诊断问题,考虑滚动轴承非线性赫兹接触和轴承径向间隙,建立了含不平衡-碰摩耦合故障的转子-滚动轴承系统动力学模型.应用三维谱图分析碰摩诊断依据和确定频段特征,利用仿真数据获取结构最优的神经网络模型,并对试验碰摩故障数据进行诊断,识别率高达90%以上.计算结果充分表明了建立的动力学模型的有效性,同时,研究结果为有效结合故障机理分析与故障智能诊断提供了新的方法.
- 转子 /
- 滚动轴承 /
- 耦合动力学 /
- 碰摩 /
- 智能诊断
Abstract: This paper aims at diagnosing the rubbing fault of a rotor supported on ball bearings.Firstly,a dynamics model of unbalance-rubbing coupling fault of rotorball bearing system was established by taking into account the nonlinear Hertzian contact and the radial clearance;secondly,3-Dspectrum diagram was used to analyze the rubbing fault and determine the characteristics of every frequency zone;thirdly,an optimized self-adaptive neural network was obtained using simulation data,and rubbing test samples were diagnosed with a recognition accuracy over 91%.The results validate the usefulness of this dynamics model,meanwhile the research findings provide a new method for effectively combining malfunction mechanism analysis and intelligent diagnosis.
- rotor /
- ball bearings /
- coupling dynamics /
- rubbing /
- intelligent diagnosis

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参考文献(9)

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