航空發(fā)動(dòng)機(jī)碰摩故障的非線性動(dòng)力學(xué)分析.pdf

1、沈陽(yáng)建筑大學(xué)碩士學(xué)位論文航空發(fā)動(dòng)機(jī)碰摩故障的非線性動(dòng)力學(xué)分析姓名：邵秋波申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：機(jī)械電子工程指導(dǎo)教師：方勃2011碩士研究生學(xué)位論文AbstractIIIAbstractTherubimpactfaultwasexistedbetweenrotsstatsofanaeroengine.Itisoneofthemainfactsfthenmalrunningoftheengine.Thenonlineardynamicso

2、fanaeroplaneenginewithtworotsundertheinfluenceofrubbetweenrotsstatsisstudiedinthisdissertation.Thenonlineardynamicbehaviofthissystemisanalyzedbythenonlineardynamicsthey.Themechanismoftherubimpactfaultisrevealed.Therefere

3、ncethetheybasisareprovidedftheactualanalysis.Accdingtotheactualstructureoftheaeroenginewithtworotsthedynamicsmodelwithtworotsrollingbearingundertheinfluenceofrubwasestablishedbythetheyoftherotdynamics.thegyroscopiceffect

4、isconsidered.Thebearingsofhighpressurerotaretwosamerollingbearings.Thedynamicmodeloftherollingbearingwasestablishedinthisdissertation.TheclearancesthecontactanglesthenonlinearfceswithHertzcontactthedistributionaboutthelo

5、adsarefullyconsidered.thenthebearingcapacityofthisrollingbearingiswkedout.Inthesystemtherubimpactfcebetweenrotsstatsisstrongnonlinearfce.Thedynamicmodelofrubimpactfcewasestablishedconsideringtherubimpactofbetweenrotsstat

6、sasthelocalrubimpact.Thedynamicssystemoftheaeroengineundertheinfluenceofrubisastrongnonlinearsystem.Inthisdissertationthedimensionofthisnonlinearsystemisreducedbythemethodofmodaltruncationthustheacteristicscouldbeobtaine

7、dbytheanalysisfthenewnonlinearsystem.Thecomputationalefficiencyisimproved.theanalyticaldifficultyisreduced.Inthedissertationtheshootingmethodisusedtostudythenonlineardynamicbehaviofthesystem.Thegraphsaboutthebifurcationc

8、haoticareobtainedbythePoincarsections.AccdingtothePoincarmapsthediagramsofaxlecenter’sbitthediagramsaboutthephasethegraphsaboutthebifurcationchaotichowwastheinfluencefthedynamicsbehaviofthesystemwhentheclearancesbetweenr

9、otsstatsthespeedsoftherotwithhighpressuretheeccentricamountofthedisc’squalityaretransfmed.Accdingtotheresultwecanfindthatthedynamicbehavisofthissystemexperiencesomemotionswhicharethechaoticmotionsthequasiperiodicmotionth

10、eperiodicmotionsthestrictlyperiodicmotions.Theconversionsbetweendifferentmotionsarerealizedbythebackwardbifurcation.Itisshownthatthedynamicbehavisofthissystemexperiencedthattheperiodicmotionsthequasiperiodicmotionstheper