外文翻译=柔性臂架自行式起重机倾翻载荷=5000字符

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1、JournalofSoundandVibration(1999)223(4),645±657ArticleNo.jsvi.1999.2154,availableonlineathttp://www.idealibrary.comonTIPPINGLOADSOFMOBILECRANESWITHFLEXIBLEBOOMSS.KILICËASLAN,T.BALKANANDS.K.IDERDepartmentofMechanicalEngineering,MiddleEastTechnicalUniversity,06531Anka

2、ra,Turkey(Received23July1997,andin®nalform4January1999)Inthisstudythecharacteristicsofamobilecraneareobtainedbyusinga¯exiblemultibodydynamicsapproach,forthedeterminationofsafeloadstopreventtippingofamobilecrane.Onlytheboomofthecraneisassumedtobe¯exiblesinceitistheo

3、nlyelementthathasconsiderablede¯ectionsinapplications.Thecoupledrigidandelasticmotionsofthecraneareformulatedandsoftwareisdevelopedinordertocarryoutthedynamicanalysis.Thevariationofpistonforcewithrespecttoboomangularpositionfordierentboommotiontimesaresimulated,loa

4、dcurvesaregeneratedandtheresultsarecomparedwiththeexperimentalresultsobtainedfroma10tmobilecrane.#1999AcademicPress1.INTRODUCTIONCranesasmechanicalsystemsareingeneralclosed-chainmechanismswith¯exiblemembers.Intheproblemofdeterminationofsafeloadswhichasafunctionofth

5、eboomangularposition,thesolutionofthedynamicequationsisnecessary.Therearefewstudiesrelatedtothedynamicsandcontrolofmobilecranesforvariousapplications.Inalmostallofthesestudiesthebody¯exibilityisnottakenintoconsideration.Adynamicmodelforthecontrolofa¯exiblerotarycra

6、newhichcarriesoutthreekindsofmotion(rotation,loadhoistingandboomhoisting)simultaneouslyisderivedbySatoandSakawa[1].Onlythejointbetweentheboomandthejibisassumedtobe¯exible.Thegoalistotransferaloadtoadesiredplaceinsuchawaythatattheendofthetransfertheswingoftheloaddec

7、aysasquicklyaspossible.TheapplicationofahookloadandsafeloadindicatorandlimiterformobilecranesispresentedbyBalkanwherethemicroprocessor-basedcontrolsystemforthedeterminationofcurrenthookloadisbasedonoilpressureandboomangle[2].Inthispaper,mobilecranecharacteristicsar

8、edeterminedbyusing¯exiblemultibodyanalysis.Kinematicsandequationsofmotionofthe¯exiblemultibodysystemarederived.Softwarehasbeendevelopedtocarryout