摘要
以具有相同结构尺寸的四根多盘转子作为研究对象,利用精密线切割的加工方式分别在四根转子的不同位置预制不同深度的横向裂纹。对裂纹参数发生改变的转子系统展开振动特性测试,并分析裂纹转子的动力学响应特征与裂纹位置和裂纹深度之间的关系。试验结果表明:1/2临界转速区的2×共振现象以及1/3临界转速区的3×共振现象是转轴裂纹故障的典型特征,其中2×共振峰值会在裂纹深度达到一个临界点后迅速增加;而区别于已有研究结果,3×共振峰值会在裂纹深度达到临界点后突降;同时,引发2×和3×共振峰值发生突变的临界深度与裂纹位置是否处于轮盘根部存在关联。
Four multi-disk rotors with the same structure size are used as the research basis.The precision wire cutting method is used to prefabricate transverse cracks of different depths at different positions of the four rotors.The vibration characteristics of the cracked rotor system with changed crack parameters are tested and the relationship between the dynamic response characteristics of the cracked rotor and the crack location and crack depth is analyzed.The test results show that the 2×resonance phenomenon in the 1/2 critical speed zone and the 3×resonance phenomenon in the 1/3 critical speed zone are the typical characteristics of the rotating shaft crack failure.The 2×resonance peak value increases rapidly after the crack depth reached a critical point.While the 3×resonance peak value,which is different from the results of existing studies,drops abruptly after the crack depth reached a critical point.Also,there is a correlation between the critical depth that triggered an abrupt change in the peak 2×and 3×resonance and whether the crack location is at the root of the disc.
作者
韩冰
刘占生
何鹏
颜培刚
HAN Bing;LIU Zhansheng;HE Peng;YAN Peigang(School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)
出处
《振动工程学报》
北大核心
2025年第3期461-468,共8页
Journal of Vibration Engineering
基金
国家科技重大专项资助项目(2017-Ⅳ-0008-0045)。
关键词
转子动力学
振动特性试验
裂纹深度
裂纹位置
多盘转子系统
rotor dynamics
vibration characteristic experiment
crack depth
crack position
multi-disk rotor system
