中国电力2017，Vol.50Issue(12)：153-158,6.DOI:10.11930/j.issn.1004-9649.201702009
风电机组齿轮箱非平稳振动信号谱分析方法
Spectrum Analysis of Nonstationary Vibration Signal for Wind Turbine Gear Box
摘要
Abstract
Gearbox is an important component of wind turbine,which directly determines wind farm revenue.It is of great significance to gearbox operational status evaluation by analyzing vibration signals.The structure and failure characteristics of wind turbine gearbox are discussed first.According to characteristics of one type of wind turbine gearbox,schemes for vibration data acquisition are established and high-speed shaft vibration signals from two wind turbine gearboxes are collected.Comparative analysis is performed by using Hilbert energy spectrum and short-time Fourier spectrum rearrangement methods to extract fault characteristic frequency from high-speed shaft measuring point vibration signal on two wind turbine gearboxes.Analysis results indicate that one gearbox has high-speed shaft damage which is verified by field test.The result confirms validity and practicability of combination of Hilbert energy spectrum and short-time Fourier spectrum rearrangement methods in extraction of wind turbine gearbox fault characteristic frequency.关键词
风电机组/齿轮箱/非平稳信号/Hilbert能量谱/短时傅里叶重排谱Key words
wind turbine/gearbox/nonstationary signal/Hilbert energy spectrum/short-time Fourier spectrum rearrangement分类
信息技术与安全科学引用本文复制引用
丁显,柳亦兵,滕伟..风电机组齿轮箱非平稳振动信号谱分析方法[J].中国电力,2017,50(12):153-158,6.基金项目
国家自然科学基金资助项目(51775186,51305135)This work is supported by National Natural Science Foundation of China (No.51775186,51305135). （51775186,51305135）
