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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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

Received: 07 May 2015 Published: 25 July 2016

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2016/V35/I15/35

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