转轴上裂纹在通过临界转速过程中的呼吸特征  

Breathing Characteristics of the Crack in a Rotating Shaft when Rotor Passing through Critical Speed

作　　者：李宁[1] 程礼[1,2] 陈雪峰[2] 

机构地区：[1]空军工程大学,西安710051 [2]西安交通大学机械制造系统工程国家重点实验室,西安710049

出　　处：《噪声与振动控制》2010年第2期88-91,共4页Noise and Vibration Control

基　　金：国家"863"计划项目(NO.2007AA04Z410);总参维修预研基金(5132701)

摘　　要：为了研究复杂涡动引起的裂纹非线性呼吸行为对转子临界转速的影响,在恒速裂纹转子运动方程的基础上构建带横向裂纹Jeffcott转子的通用运动方程,对裂纹转子加速通过临界转速的过程进行了数值研究。结果表明:不平衡量方位角对临界转速有较大影响;在临界转速附近,裂纹的呼吸减弱;在恒加速过程中裂纹转子的最大响应滞后于重心转向。在转子实验台上进行裂纹转子通过临界转速的实验验证,观察数据支持理论研究结果。Based on the dynamic equations of cracked rotor under constant speed, the general dynamic equations of a Jeffcott rotor with a transverse crack are developed for studying the influence of nonlinear breathing behavior of the crack due to whirling on the critical speed of the rotor. The vibration response of the cracked rotor, when the rotor is accelerating and passing through critical speed, is inves- tigated by numerical method. The results reveal that the imbalance orientation angle has a greater influence on the critical speed, the crack breathing behavior is weakened near the critical speed, and the maximum response of the cracked rotor during constant accelerating process is fall behind the rotation of the center of gravity. The experiment of passing through critical speed of a cracked rotor was made on a rotor testing platform. And the experimental observations support the analytical results.

关 键 词：振动与波 转子动力学 裂纹转子 运动方程 裂纹呼吸 临界转速 

分 类 号：TH133[机械工程—机械制造及自动化] O322[理学—一般力学与力学基础]