小波包能量谱在转子碰摩故障诊断中的应用

发布时间：2018-03-22 05:01

本文选题：转子系统　切入点：碰摩　出处：《机械设计与制造》2017年07期 　论文类型：期刊论文

【摘要】：针对转静碰摩故障的振动响应问题,采用小波基函数db6三层小波包分解和能量谱相结合的分析方法,对实测的碰摩故障信号进行频带能量特征提取。通过对仿真和实测信号进行小波包分解后作频谱分析发现:当转子发生转静碰摩故障时,频谱图中除了转子的工频外,在分频、分频倍频处引起比较稳定的分数谐波,并出现了3x等高阶倍频频率成分。在对实测信号作进一步能量谱分析时,存在碰摩特征频率的频段能量发生了变化,因此小波包能量谱分析方法能够很好地区分转子的碰摩故障。
[Abstract]:Aiming at the vibration response of rub-impact fault, the wavelet basis function db6 three-layer wavelet packet decomposition and energy spectrum analysis method are adopted. The frequency band energy feature is extracted from the measured rub-impact fault signal. After wavelet packet decomposition of the simulated and measured signals, it is found that when the rotor has statically rub-impact fault, the frequency spectrum is divided in addition to the rotor's power frequency. The fractional harmonics are caused by the frequency-division doubling, and the high-order frequency-doubling components, such as 3x, appear. In the further analysis of the energy spectrum of the measured signal, the energy of the frequency band with the characteristic frequency of rub-impact has been changed. Therefore, the wavelet packet energy spectrum analysis method can distinguish the rubbing fault of rotor well.
【作者单位】：郑州轻工业学院机电工程学院;
【基金】：国家自然科学基金项目(51405453) 河南省高等学校重点科研项目(NO.16A460012) 国防技术基础科研项目(JSJL2014601B004)
【分类号】：TH17

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