吉林大学机械学院本科毕业设计外文翻译格式

本科生毕业设计（论文）翻译资料中文题目：配合新一代液力变矩器的柴油动力线的一些特性英文题目：somepropertiesofadieseldrivelinewithhydrodynamictorqueconvertersofthelastestgeneration学生姓名：学号：班级：专业：机械工程及自动化指导教师：Somepropertiesofadieseldrivelinewithhydrodynamictorqueconvertersofthelatestgeneration

AbstractDynamicpropertiesofadrivelinewithacontrolledDieselengine,hydrodynamictransmissionmechanism,additionalgearingandaloading-workingmachineproducingcommonmonoharmonicloadingareinvestigated.Solutionofthedynamicproblemisbasedonphenomenologicalexperimentaldata:drivingtorque-speedcharacteristicinthepartoftheprimemoverandso-calledexternalstaticcharacteristicinthehydrotransmissionpart.Thenon-lineartaskissolvedbyamodifiedharmonicbalancemethodthatwasdescribedinprecedingpublicationsbytheauthor.Keywords:Machinedriveline;ControlledDieseldrive;Hydrodynamictorqueconverter;Workingmachine;Periodicloading;StationarydynamicstateNomenclatureandabbreviationsa,b---------Coulombandviscousnon-dimensionalfrictionlossesAi,Bi-------coefficientsinmathematicalexpressionoftorque-speedcharacteristici,im----------kinematictransmission,supplementarygearingtransmissionratioI,Iz-------meanreducedmomentofinertiaindrivingandloadingpartkλ,kK---------tangentslopesofλ(i)andK(i)curvesrespectivelyK-------------momenttransmissionM------------Diesel-enginemomentMD(ω,

z)----controlledtorque-speeddrivingcharacteristicMDmax(ω),MDmin(ω)---torque-speedcharacteristicformaximalandminimalfuelsupplyM1,(),M2,()---pumploadingmomentandturbinedrivingmomentMT1,MT2----frictionlossmomentindrivingandloadingpartMz,Mza----meanvalueandamplitudeofloadingmoment-------------hydrodynamicconvertercharacteristicradiust-------------timeT,TD------------WattregulatorandDiesel-enginetimeconstantu,z---------gasleverandregulatordisplacementw-----------commondynamicvariableε-----------regulatorstructuralparameterζ-----------regulatordampingratioλ-----------coefficientofrotationmomentν-----------loadingangularvelocity,π-------indexdenotingmeanvalueandperiodicalcomponent---------hydraulicmediumdensity----------rotationangleω1,(),ω2---pumpandturbineangularvelocityDM------Diesel-engineG,GD---additionalandWatt-regulatorgearingHdPT---hydrodynamicpowertransmissionIJ--------InjectorLM------loadingmechanism(workingmachine)P,R,T---pump,reactor,turbineArticleOutlineNomenclature1.Introduction2.Mathematicalmodelofthesystem3.Stationarydynamicsolutionatmonoharmonicloading4.Resultsevaluationandconcludingremarks1.IntroductionDynamicpropertiesofadriveline(actuatingunit)consistingofacontrolledDieselengine(DM),hydrodynamicpowertransmissionsystem(HdPT),additionalgearing(G)andaloadingmechanism(LM)orworkingmachineareinvestigated.Theworkingmachineloadstheprimemoverandthetransmissionswithaprescribedmoment.AsimpleidealisedschematiclayoutofthecompletesystemisgiveninFig.1.TheconsideredDieselengineisastandardproduction:ZETOR8002.1controlledbyamechanical(Watt’s)orelectronicregulatorRDgoverningfuelinjectorIJ.IntheplaceofthehydrodynamicpowertransmissiontherearegraduallyappliedhydrodynamictorqueconvertersofthelatestgenerationthathavebeenprojectedandtestedinWUSAM(ResearchandProjectingInstituteofMachinesandMechanisms),j.s.c.Zvolen,Slovakia.Theseconvertersrepresentathreecomponentassemblycomposedofarotationalpump(P),turbine(T)andareactor(R)thatmayrevolveinonedirectionasafreewheel.Advantageoftheseconvertersisthefactthattheirexternaldimensionsandthedimensionsoftheirindividualcomponentsareidenticalandtheymaybemutuallychangedandarbitrarilycombinedinordertoreachdemandedproperties.Theydifferonlybyinternalconfigurationandbladegeometry.Accordingto[1]uptonowmorethan70varioustypeshavebeenexperimentallytestedandfromthemtheoneshavebeenchosenthatoptimallyfulfilledrequiredproperties.Themechanicalsystemunderconsiderationrepresentsasophisticatedenergytransferchainfromasource––primemovertoworkingmechanism.Becauseeveryrealdriveisoffinitepower,anyperiodicloadingalwaysevokesvibrationsofallthedynamicvariableseventhoughwesupposealltheconnectingshaftsandgearingsrigidandbacklashfree.Theinfluenceofdynamicloadingontheprimemovermaybejustcontrolledbyasuitablechoiceofthetorqueconverter.

Fig.1.

SchematiclayoutoftheDieseldriveline.Inthepaperinfluenceofconstantandperiodicloadingontimecourseofallthedynamicvariablesofthesystem(andparticularlyonthevariablesoftheprimemover)isinvestigatedatapplicationofsomeselectedtypesofhydrodynamictorqueconvertersofthelatestgeneration.Forfulfillingthistaskitisnecessarytocreateasuitablemathematicalmodelofthewholecombinedsystemandthenfinditsstationarysolutioncorrespondingtoarequiredloading.2.MathematicalmodelofthesystemAtthebeginningitisnecessarytoemphasizethatmathematicalmodellingofthedrivelineinquestionisbased,inourapproach,onknowledgeofthepublishedphenomenologicaldata:stationarytorque-speedcharacteristicoftheprimemoverandso-calledexternalstaticcharacteristicoftheappliedhydrodynamictorqueconverter.ItisamuchsimplerprocessthanmodellingbasedonthermodynamicequationsofburningfuelmixtureintheDieselengineandonhydrodynamicequationsofrealstreamingworkingmediuminverycomplicatedcavitiesofthetorqueconverter.Thecharacteristicsareusuallygivenbymanufactureroftheindividualsystemcomponents.Thisisdifferentandsimplerapproachtosolutionoftheproblemthanonemayfinde.g.atIshihara[2],HrovatandTobler[3],KesyandKesy[4],Laptev[5]andsomeothers.Thederiveddimensionalandnon-dimensionalmathematicalmodelsofthemechanicalsystemareintroducedin[6].Thenon-dimensional,reduced,so-calledsingle-shaftmodel(inthedrivingandloadingpart),wasderivedintheformofcombinedsystemofthefollowingdifferentialandalgebraicequations:(1)(2)(3)(4)\o"ClicktoviewtheMathMLsource"M2=KM1,(5)\o"ClicktoviewtheMathMLsource"λ=λ(i),(6)\o"ClicktoviewtheMathMLsource"K=K(i),(7)(8)(9)wherethemeaningoftheindividualsymbolsisexplainedinnomenclature.Inthenon-dimensionalmodelallthedynamicvariablesandparametersareexpressedbymeansofproperlychosenrelativestandardquantitiessothatthemodelofthesystemmightbethemostsimple.Transformationoftheoriginalequationssystemtothenon-dimensionalformFigs.(1),(2),(3),(4),(5),(6),(7),(8)and(9)isdescribedindetailin[6].Asforthiscitedpaper,itisnecessarytosaythattherelativestandardvalueofloadingangularfrequencyhasbeensettledaccordingtotherelation,whereindenominatorisrelativestandardvalueoftime.Forthisvalue,thetimeconstantoftheregulatorhasbeenjustchosen,i.e.,wheretherelateddimensionaldynamicvariablesaredistinguishedbyupperbars.Theintroducedmathematicalmodelhasninevariables:M,M1,ω1,z,λ,K,i,M2,ω2andtheirmeaningisexplainedinnomenclature.ThefirstthreeequationsrepresentmathematicmodeloftheprimemoverwhereininertiamomentIthereisincludedinertiamomentofthepumpandequivalentpartoftheworkingmediumbecausedrivingandpumpshaftsareconnectedbyarigidclutch.TherightsideofEq.(3)representsthecontrolledstationarytorque-speedcharacteristicforwhichitholds:\o"ClicktoviewtheMathMLsource"MD(ω1,z)=MDmax(ω1)-[MDmax(ω1)-MDmin(ω1)]z,(10)whereMDmax(ω1),MDmin(ω1)representitsnon-dimensionalextremebranchesformaximalandminimalfuelsupplyandzisthenon-dimensionalregulatordeviation.IftheexperimentallymeasureddependencesMDmax(ω1),MDmin(ω1)areexpressedbyseconddegreepolynomialsthenthecontrollednon-dimensionaltorque-speedcharacteristichastheform:(11)Fromtheintroducedmodelitisevidentthatatchosenparametervalueudrivingspeedgrowthcausesregulatordisplacementtoincreaseandfuelsupplytodecrease.Theidealisedcontrolledtorque-speedcharacteristicforachosenparametervalueu(gasleverdisplacement)isschematicallydepictedinFig.2.FromEq.(2)itisevidentthatthestructuralparameterεmustbechoseninsuchawaythatregulatorself-oscillationsshouldnotoccur.Eqs.Figs.(4),(5),(6),(7)and(8),inthesenseofconsiderationsin[6],representthedynamicequationsofthetorqueconverter.Eq.(9)representssimplifiedmotionequationoftheloadingmechanismunderassumptionthatthereducedinertiamomentIzdoesnotdependonrotationangle.Inthisreducedinertiamomentthereisinvolvedinertiamomentoftheturbinewithequivalentpartoftheworkingmediumtoo.Itisobviousthatinthisinertiamomentandinallmomentsoftheloadingmechanismthereisconsideredgearratioimofthesupplementarygearingoftheoriginallynon-reducedsystem.Eqs.Figs.(6)and(7)representtheexternalstaticcharacteristicofthehydrodynamictransmission,i.e.formaldependencesofλandKonthekinematicratioiandthedependencesaregivenforeveryconvertertypeingraphicalform.ThedynamicvariablesλandKaredefinedinnon-dimensionalformverysimplybynon-linearrelationsFigs.(4)and(5).Inageneralwaythesenon-dimensionalvariablesaredefinedbymeansofdimensionalvalues(distinguishedbyupperbars)asfollows:(12)whereindividualsymbolmeaningmaybefoundinnomenclature.Aswehavechosen(accordingtoFig.2)fortherelativestandardvalueofangularvelocitytheidlemotionangularvelocityoftheDieselengineatmaximalfuelsupply,i.e.atz

=

0,thenfromFigs.(4)and(12)itisevidentthattherelativestandardmomentvalueis(13)Itmeansthatiffortheapplieddrives−1andalltheappliedconvertertypeshaveequalcharacteristicradiusmandifweconsidermeanvaluekg

m−3atstationarythermicregimethentherelativestandardvalueofthemomentisN

mforalltheconsideredconvertertypes.Theexternalstaticcharacteristicsoftheappliedconverterswithinternallabelling:M350.222,M350.623M,M350.675,M350.72M3M,are(accordingtothemeasuringrecords[7])successivelyintroducedinFig.3(a)–(d).Whenthetorque-speedcharacteristicisknownandthemeasureddependencesFigs.(6)and(7)areatdisposal,itispossibletosolvethecombinedsystemofdifferentialandalgebraicequationsFigs.(1),(2),(3),HYPERLINK"/science?_ob=ArticleURL&_aset=V-WA-A-W-Z-MsSAYVA-UUA-U-AAVYUCWYYV-AAVCZBBZYV-YAUWCUZEE-Z-U&_rdoc=1&_fmt=full&_udi=B6V46-4D3B01N-3&_coverDate=01%2F01%2F2005&_cdi=575