基于叶尖定时技术的轮盘外缘裂纹故障分类方法研究
Research on Crack Fault Classification Method of Wheel Outer Edge Based on Tip Timing Technique
汤成1
作者信息
- 1. 佛山科学技术学院机电工程与自动化学院,广东佛山 528225
- 折叠
摘要
针对轮盘外缘裂纹信号的故障分类需求,设计了基于Simulink的叶尖定时信号仿真模型,利用MATLAB对不同裂纹程度进行分类.通过ANSYS有限元分析软件建立叶片轮盘系统模型,计算不同转速下叶片的固有频率,得到叶片动频与转速频率的函数关系,根据叶片振动理论,利用Simulink设计叶片振动系统仿真模型,考虑转子转速波动和不平衡振动对叶片振动的影响,建立对应的仿真模型,得到含扰动量的叶尖定时信号.对叶尖定时信号进行频谱分析,通过Simulink设计数字滤波器,去除信号中含扰动量的频率成分,构造不同裂纹程度的叶尖定时信号数据集,将其去噪后导入MATLAB分类学习器中,对不同分类方法进行对比并测试.结果表明,此方法可对不同裂纹程度的叶尖定时信号进行准确分类,为轮盘外缘裂纹故障分类方法研究提供参考.
Abstract
Aiming at the fault classification requirements of the crack signals on the outer edge of the disk,a simulation model of blade tip timing signals based on Simulink was designed,and the classification method of different crack degrees by MATLAB was studied.Firstly,the model of blade disk system was established by ANSYS finite element analysis software,and the natural frequencies of blades at different speeds were calculated to obtain the functional relationship between blade's dynamic frequency and rotational speed and frequency.Then,according to the theory of blade vibration,a simulation model of the blade vibration system was designed with Simulink.At the same time,considering the influence of the rotor speed fluctuation and unbalanced vibration on the blade vibration,the corresponding simulation model was established,and the blade tip timing signal with disturbance was obtained.Then,the frequency spectrum of the blade tip timing signal was analyzed,and a digital filter was designed by Simulink to remove the frequency components containing disturbance in the signal.Finally,the blade tip timing signal data sets with different crack degrees were constructed,which were de-noised and imported into the classification learner of MATLAB,to compare and test different classification methods.The results show that the blade tip timing signals with different crack degrees can be accurately classified,which can provide some reference for the method of fault classification of the outer edge cracks of the disk.
关键词
叶尖定时/有限元分析/Simulink仿真/频谱分析/分类学习器/故障诊断Key words
Blade tip timing/Finite element analysis/Simulink simulation/Spectrum analysis/Classification learner/Fault diagnosis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据