随机激励下风机齿轮箱动力学建模及故障特征提取

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摘要本文研究随机激励下的风机齿轮箱动力学特性，同时对典型的早期局部齿形故障特征进行提取。首先,建立了具有十六个自由度的风机齿轮箱动力学模型，模拟了多组随机不确定风载数据并作用在模型上进行仿真计算，通过分析内部齿轮振动信号的时频谱图和概率密度函数，研究随机不确定风载对齿轮箱动力学特性的影响。其次，在模型中考虑不同程度的齿面缺陷故障，运用同步小波压缩方法对仿真计算得到的齿轮振动信号进行分析。研究结果为分析不同工况下的风机齿轮箱动力学特性提供参考。

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关键词 ：风机齿轮箱, 随机激励, 动力学建模, 同步小波压缩, 故障特征提取

Abstract：This paper investigates the dynamic characteristics of wind turbine gearbox under random excitation, meanwhile, the characteristics of typical localized tooth defect is extracted. first, a 16-degree-of-freedom dynamic model including several groups of random uncertain wind load is developed, the time-frequency spectrum and probability density function of the internal gear vibration signal are analyzed to study the effect of random uncertain wind load on the gearbox. Then, localized tooth defect of different degree is considered, synchrosqueezed wavelet transforms is used to analyse the numerical results. The research results provide a reference for the analysis of dynamic characteristics of wind turbine gearbox under different conditions.

Key words： wind turbine gearbox random excitation dynamic modeling Synchrosqueezing fault feature extraction

收稿日期: 2015-05-07 出版日期: 2016-07-25

引用本文:

何俊杨世锡甘春标 . 随机激励下风机齿轮箱动力学建模及故障特征提取[J]. 振动与冲击, 2016, 35(15): 35-40.
He Jun, Yang Shi-xi, Gan Chun-biao . Dynamic modeling and fault feature extraction of wind turbine gearbox under random excitation. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(15): 35-40.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2016/V35/I15/35

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