摘要
基于断裂理论确定含裂纹结构的柔度,采用裂纹开闭模型,推导了固定坐标系中含裂纹轴的运动微分方程,分析研究了含横向裂纹Jeffcott转子在裂纹深度发生变化时的动力学行为,并进行了数值计算.分析结果表明:当裂纹深度很小时振动响应中就出现了2倍及3倍等倍频分量,并产生分频共振现象;裂纹转子在临界转速以上运行时,其转轴频响应和涡动幅值对裂纹深度变化不甚敏感,但高频分量还会出现.
In this paper, by making use of proper crack stiff mode and open-close mode, the vibration differential equation of crack rotor is deduced, and the response character of the Jeffcott rotor with a transverse crack in different depth is studied. Numerical analysis indicates: 2× and 3× frequency component and so on appear in vibration response at small crack depth, and low frequence resonance shows. The response amplitude of the rotor and the while radius are not sensitive to the crack depth when the rotor speed exceeds the critical speed, but the high frequency component can be observed as well.
出处
《哈尔滨理工大学学报》
CAS
2002年第3期1-5,共5页
Journal of Harbin University of Science and Technology
基金
国家重点基础研究规划项目(G1998020317)
哈尔滨工业大学跨学科交叉性研究基金(HIT.MD2000
05)
国家自然科学基金重大项目(1990510)
