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Nonlinear dynamic behavior of rubbing rotor under interaction between bending and torsional vibrations
作者姓名:刘占生  崔颖  韩万金  隋玉秋  黄文虎
作者单位:1. School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China; 2. School of Mechatronic Engineering,Harbin Institute of Technolo
基金项目:SponsoredbytheNationalNaturalSciencefoundationofChina(GrantNo .19990 5 10 )
摘    要:0 INTRODUCTIONThestringentrequirementsfortheoperationaleffi ciencyofrotatingmachinerymakestheradialclearancebe tweenrotorandstatorsmallerandsmallerinrecentyears ,therebyincreasingtheprobabilityfortherotortorub .Analysisofvibrationalcharacteristicsofrubb…


Nonlinear dynamic behavior of rubbing rotor under interaction between bending and torsional vibrations
LIU Zhan-sheng,CUI Ying,HAN Wan-jin,SUI Yu-qiu,HUANG Wen-hu.Nonlinear dynamic behavior of rubbing rotor under interaction between bending and torsional vibrations[J].Journal of Harbin Institute of Technology,2002,9(2).
Authors:LIU Zhan-sheng  CUI Ying  HAN Wan-jin  SUI Yu-qiu  HUANG Wen-hu
Abstract:The nonlinear dynamic behavior of a rubbing rotor system was studied with a mathematical model established with the eccentricity and interaction between bending and torsional vibrations taken into consideration. The nonlinear vibrational response of a rubbing rotor was analyzed using numerical integral, spectroscopic analysis and Poince mapping method, which made it possible to have better understanding of the vibrational characteristics of partial rubbing and complete circular rubbing rotors. The numerical results reveal the response of torsional vibration mainly takes a form of superchronous motion, and its frequency decreases as the rotational speed increases when partial rubbing occurs, and the response of torsional vibration is synchronous when complete circular rubbing occurs. The comparison of the dynamics of rubbing rotors with and without the interaction between bending and torsional vibrations shows the interaction between bending and torsional vibrations advances the rotational speed, at which the response of bending vibration changes from a synchronous motion into a quasi periodic motion, and the interaction between bending and torsional vibrations reduces stability of the rubbing rotor.
Keywords:interaction between bending and torsional vibrations  rubbing rotor  bifurcation
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