23122.柔性體含摩擦斜碰撞問題的混合分析模型法

1、聲明本學(xué)位論文是我在導(dǎo)師的指導(dǎo)下取得的研究成果，盡我所知，在本學(xué)位論文中，除了加以標注和致謝的部分外，不包含其他人已經(jīng)發(fā)表或公布過的研究成果，也不包含我為獲得任何教育機構(gòu)的學(xué)位或?qū)W歷而使用過的材料。與我一同工作的同事對本學(xué)位論文做出的貢獻均己在論文中作了明確的說明。研究生簽名：勉壘蘭壟多口∥年／j月尹日學(xué)位論文使用授權(quán)聲明南京理工大學(xué)有權(quán)保存本學(xué)位論文的電子和紙質(zhì)文檔，可以借閱或上網(wǎng)公布本學(xué)位論文的部分或全部內(nèi)容，可以向有關(guān)部門或機構(gòu)送

2、交并授權(quán)其保存、借閱或上網(wǎng)公布本學(xué)位論文的部分或全部內(nèi)容。對于保密論文，按保密的有關(guān)規(guī)定和程序處理。研究生簽名：AbS仃act碩士論文AbstractForthesimplerclassicalFillipovsystemandapulsenon—smoothdynamicalsystemswhicharemerelyactedbytheeffectoffrictionandthecollinearimpact，respectively

3、，thetraditionalmethodsaregenerallyignoredthedeformationeffectofflexiblestructuresandcollisionprocessesduetothenonsmoothcharactersofthefrictionandthecollinearimpactInordertolowerthedifficultyofsolvinganalysis，thesemethods

4、usuallywerebasedonNewtonorPoissoncoefficientofrestitutionrigidmodelTeasonablyestimatingthemorecomplexmechanicalbehaviorofobliquecollision、析tllfrictionthispaperpresentsahybridanalysismodelwhichconsidersnormalcontactcompli

5、ance，tangentialcontactcomplianceandtheflexibilityoftheoverallstructureAbilinearcontactmodelbasedonStrongeenergycoefficientofrestitutionisusedtoaccountforthenormalcontactpressurerestitutionprocessandthetangentialfrictione

6、ffectsofthelocalcontactzoneAfinitesegmentmethodwhichnaturallytakesintoaccountthegeometricnonlinearityisusedtodiscretedisplacementfieldoftheflexiblebeam，thenthepiecewisecontinuousdynamicalequationsarederivedTheswitchingcr

7、iteriaforthetangentialsticksliprelativemotionandthenormalcompressionrecoveryphasearegivenandusingevent—drivenmethodtosolvethekineticequationBytheuseofthepresentmodel，thetransientresponsesoftheflexiblebeamobliquecollision

8、、析thafixedplanearecalculatedBycomparingwiththeexperimentaldataandtheresultsofthethree—dimensionaldynamicfiniteelementmethod，theaccuracyandfeasibilityofthehybridmodelarevalidatedItisshownthatthishybridmodelCanaccuratelyde

9、scribetherepeatedlyswitchingoftheflexiblebeamstickslipmotionandtangentialcontactforcetimehistoryThestudyalsofoundthattheenergycoefficientofrestitutionhasnoeffectonthepeakofthecontactforces，butasignificanteffectonthenorma

10、lseparationvelocity，meanwhileatinyeffectonthetangentialvelocityThepeakvalueofthepureslidingcontactforceissignificantlylessthanthepeakvalueofstickcontactforceAfterthesystemappearsstickstate，ifconsideringtheflexibilityofth

11、estructure，thepeakofthecontactforcewillnotincreasewhenthefrictioncoefficientincreasesIfwithoutconsideringtheflexibilityofthestructure，thepeakofthecontactforcewillsignificantlyincreaseswhenthefrictioncoefficientincreasesT

12、hissuggeststhestructuralflexibilityhasanimportantinfluenceonthedynamicsofthesystemInaddition，becausethedegreeoffreedomsofsystemaresmallanddonotrequirethecalculationiteration，thismethodovercomesthedisadvantageoftheconvent