转子系统二阶油膜失稳故障仿真及试验研究.pdf

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1、499Vol.49No.920135JOURNALOFMECHANICALENGINEERINGMay2013DOI10.3901/JME.2013.09.024* ( 110819) !"#$%&'()*+,'-./012345-67*+89:;<=*+>?@"ABCDEFGHIBJK.LMNO.PQR8STQR0U#$%VWIX'

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5、rO322TH113SimulationandExperimentResearchontheSecondOrderOil-filmInstabilityFaultinaRotorSystemMAHuiLIHuiZHANGSuyanWENBangchun(Sc

6、hoolofMechanicalEngineeringandAutomation,NortheasternUniversity,Shenyang110819)AbstractAimingattheoil-filminstabilityproblemoftheslidingbearingatahighspeed,asinglespanrotorsystemwithtwodiscsisstudied.Consideringthegyroscopiccouplingeffect,alumpedmassmodeloftheroto

7、rsystemisestablishedwheretheleftandtherightbearingsaresimulatedbyaspring-dampingmodelandano-linearoil-filmforcemodeloftheshortbearing,respectively.Consideringtheeccentricitiesoftwodiscsinoppositephases,theoil-filminstabilityruleandthecomplicatednonlineardynamicchar

8、acteristicsoftherotorsystemareanalyzedbytherotororbit,timedomainwaveform,amplitudespectrumandspectrumcascade.Experimentsareperformedbyusingatestrigtoveritythesimulationresults.Theoreticalanalysisandexperimentalresultsallshowthatthefirsttwooilwhipwilloccursimultaneo

9、uslyathigherrotatingspeeds,oil-filminstabilitycanexcitethecomplicatedcombinationfrequencycomponentsofthefirstandsecondoil-whipfrequenciesandtheenergycanbetransformedbetweenthefirstoilwhipandthesecondone.KeywordsrRotorsystemOil-filminstabilityDynamiccharacteristicCo

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