预览加载中，请您耐心等待几秒...

质量不平衡转子系统发生碰摩后振动特性分析.pdf

预览
1/7
2/7
3/7
4/7
5/7
6/7
7/7

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

VIBRATIONCHARACTERISTICSANALYSISOFTHE RUB-IMPACTROTORSYSTEMWITHMASS UNBALANCE# 5JIAJiuhong,HANGTianqi* (KeyLaboratoryofPressureSystemsandSafety,MinistryofEducation,EastChinaUniversityof ScienceandTechnology,ShangHai200237) Abstract:Inthispaper,vibrationcharacteristicsofarub-impactJeffcottrotorsystemexcitedbymass unbalanceincludingtheeccentricmassandtheinitialpermanentdeflectionareinvestigated.Through 10thenumericalcalculation,rotatingspeeds,masseccentricities,initialpermanentdeflectionsandphase anglesbetweentheeccentricmassdirectionandtherotorinitialpermanentdeflectiondirectionareused ascontrolparameterstoinvestigatetheireffectontherub-impactrotorsystemwiththehelpof bifurcationdiagrams,Poincaremaps,frequencyspectrumsandorbitmaps.Resultshowsthatthesetwo kindsofmassunbalancehavegreatbutdifferenteffectonthedynamiccharacteristicoftherubbing 15rotorsystem.Differentmotioncharacteristicsappearwiththevaryingofthesecontrolparameters,and complicatedmotionssuchasperiodicandquasi-periodicvibrationsareobserved.Corresponding resultscanbeusedtodiagnosetherub-impactfaultanddecreasetheeffectofrubimpactintherotor systemwithmassunbalance. Keywords:Rub-impactrotorsystem;Massunbalance;Nonlinearmotion 20 0Introduction Massunbalanceoftherotoristhemainfactortoincreasevibrationandbringunstable characteristicstothewholerotorsystem[1-2].Sincetherotor-statorrubisoneofthemainfaultsfor largerotarymachines,ithasattractedgreatconcernandlotsofresearchworkhasbeendoneby 25manyresearchers.JunyiCao[3]investigatednonlineardynamiccharacteristicsofrub-impactrotor systemwithfractionalorderdamping.Fromthestudy,variouscomplicateddynamicbehaviors andtypesofroutestochaoswerefound,includingperioddoublingbifurcation,suddentransition andquasi-periodicfromperiodicmotiontochaos.Jawaidi[4]investigateddynamicsofarigidrotor supportedbyload-sharingbetweenmagneticandauxiliarybearingsforarangeofrealisticdesign 30andoperatingparameters.Manyphenomenawerefoundandstudied.WenmingZhang[5]carried outananalyticalinvestigationon