一种测量转子动刚度的方法及应用
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摘要
基于Jeffcott转子不平衡响应理论,通过在轮盘上加载不平静质量,测量不平衡质量产生的不平衡响应,实现了一种获得转子动刚度曲线的方法。通过改变支座拧紧力矩来改变支座连接刚度,以转子动刚度衡量不同支座连接刚度对转子动力学特性的影响。理论和试验结果验证了该方法的正确性,试验表明:当支座反力小于支座拧紧力矩所能产生的最大静摩擦力时,增加支座连接刚度并不会改变转子系统的动刚度。
Based on Jeffcott rotor unbalance response theory,a method of obtaining rotor dynamic stiffness was achieved through loading unbalance weight on the pan and then measuring the unbalance vibration response.Different tightening torque produced corresponding coupling stiffness,so research on relations between coupling stiffness and rotor dynamic stiffness was carried on by measuring corresponding rotor dynamic stiffness in different support tightening torques.Theoretical and experimental results prove this method is correct.Experimental results turne out that increasing coupling stiffness could not change rotor system dynamic stiffness if the reaction force on the support is less than the maximum static friction generated by the tightening torque.
Based on Jeffcott rotor unbalance response theory,a method of obtaining rotor dynamic stiffness was achieved through loading unbalance weight on the pan and then measuring the unbalance vibration response.Different tightening torque produced corresponding coupling stiffness,so research on relations between coupling stiffness and rotor dynamic stiffness was carried on by measuring corresponding rotor dynamic stiffness in different support tightening torques.Theoretical and experimental results prove this method is correct.Experimental results turne out that increasing coupling stiffness could not change rotor system dynamic stiffness if the reaction force on the support is less than the maximum static friction generated by the tightening torque.
引文
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10王三民,诸文俊.机械原理与设计.北京:机械工业出版社,2007
2 Chu FL,Tang Y.Stability and non-linear responses of a rotor-bear-ingsystemwith pedestal looseness.Journal of Sound and Vibration,2001;241(5):879-893
3 Ji Z,ZuJ W.Methodof multiplescales for vibrationanalysisof rotor-shaft systems with non-linear bearing pedestal model.Journal ofSound and Vibration,1998;218(2):293-305
4 KimYB,Noah S T.Stability and bifurcation analysis ofoscillators withpiecewise-linear characteristics:a generalapproach.ASMEJ of Ap-plied Mechanics,1991;58(6):545-554
5马辉,孙伟,刘杰,等.旋转机械支座松动故障的试验.农业机械学报,2007;38(6):134-137
6廖明夫.转子动力学基础.西安:西北工业大学,2005
7顾家柳,丁奎元,刘启洲,等.转子动力学.北京:国防工业出版社,1985
8薛一谔,何衍宗,王正,等.转子动力学.北京:清华大学出版社,1987
9苟文选.材料力学.西安:西北工业大学出版社,2000
10王三民,诸文俊.机械原理与设计.北京:机械工业出版社,2007