摘要
为了模拟现实生产中旋转机械出现的转子裂纹故障,在单跨转子实验台上,对含有裂纹的转子系统进行了实验,把采集到的故障信号,利用三维谱振图和小波尺度图结合进行分析.结果表明:两种方法相结合可以更好地揭示裂纹故障信号的频率结构,特别是在1/2临界转速下能检测出能量相对较小的二倍频分量;系统在2倍临界转速时,会产生1/2次谐波共振,随着裂纹的加深,会产生高次谐波,这些频率特征可以作为诊断裂纹故障的一个依据.
Simulation experiments were carried out on a test rig for single-span rotor system with crack fault and the collected fault signals were analyzed by way of a 3-D waterfall spectra in combination with reassigned wavelet scalogram. The results showed that the combination can reveal the frequency structure of signal better especially the relatively low-energy twofold frequency component which can be measured at half of the critical speed. It was found that an one-half order harmonic or subharmonic resonance comes up at twofold critical speed and with the crack deepened further, high order harmonies occur. These frequency characteristics features can be regarded as a reference to diagnosing the crack fault.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第4期545-548,552,共5页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(10572036)
关键词
单跨转子系统
裂纹故障
再分配小波尺度图
小波分析
故障诊断
single-span rotor system
crack fault
reassigned wavelet scalogram
wavelet analysis
fault diagnosis
