有初弯的单盘不平衡转子等加速过临界时的瞬态响应分析  

Transient Dynamic Responses of Unbalanced Jeffcott Rotor Speed Through the Critical With Initial Bending

作　　者：杨恩东[1] 孙虎儿[1] 苏飞[1] 

机构地区：[1]中北大学机械与动力工程学院,山西太原030051

出　　处：《机械设计与制造》2014年第12期30-32,36,共4页Machinery Design & Manufacture

基　　金：山西省自然科学基金(2014011024-6)

摘　　要：以具有初始弯曲横置Jeffcott转子系统为研究对象,建立含有初始弯曲和加速度项的运动微分方程。通过数值分析,就不同初始弯曲、不平衡和外阻尼对转子加速过临界时的动挠度、相位角和进动角速度的变化规律进行了详细的讨论。结果表明:在转子达到临界转速时,转子的动挠度幅值随着初始弯曲的增加或者外阻尼的减小而迅速增加;不平衡对转子在临界转速前后的动挠度影响较为明显,并且近似呈线性关系变化。不同的外阻尼和不平衡对转子系统的相位角和进动角速度变化都有较大的影响。To tap Jeffcott rotor system with initial bend as the research object, we set up differential equation of motion which includes initial bending and acceleration. Through numerical analysis, it discussed the changing rule that different initial bending, unbalanced and outer damping to the dynamic deflection, phase angle, the angular velocity of precession when the rotor speed through the critical speed. Experimental results show that： when the rotor gets to the critical speed, the rotor dynamic deflection amplitude rapidly increases with the increase of initial bending or the decrease of the outer damping; unbalanced to the influence of the rotor dynamic deflection around the critical speed is more obvious and approximaXtely linear change. Different external damping and the unbalance to the changes of phase angle and the angular velocity of precession of the rotor system have great influence.

关 键 词：初始弯曲 不平衡转子 临界转速 瞬态响应 

分 类 号：TH16[机械工程—机械制造及自动化]