车辆工程IIIntroduction专题知识_第1页
车辆工程IIIntroduction专题知识_第2页
车辆工程IIIntroduction专题知识_第3页
车辆工程IIIntroduction专题知识_第4页
车辆工程IIIntroduction专题知识_第5页
已阅读5页,还剩38页未读 继续免费阅读

下载本文档

版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领

文档简介

铁道与城市轨道交通学院二零零七年八月十八日

车辆工程II

-轨道车辆设计理论

VehicleEngineeringII

-RailwayVehicleDesignTheoryRailwayandUrbanMassTransitResearchInstituteIntroductionDevelopmentofRailwayVehicle

inter-cityvehicle,ormainlinevehiclehighspeedvehiclemetrovehiclelightrailvehiclemonorailvehiclemaglevvehicleintelligenttransportationvehicleByFengming2023TongjiUniversityIntroductionDevelopmentofRailwayVehicleICE:IntroductionDevelopmentofRailwayVehicleTGV:IntroductionDevelopmentofRailwayVehicle500系:IntroductionDevelopmentofRailwayVehicleX2023:IntroductionDevelopmentofRailwayVehicleTR06IntroductionDegrees-offreedom:-1bodywith5dofs=52bogieswith5dofs=104wheelsetswith2dofs=8Total=26,i.e.52statesIntroductionIntroductionDevelopmentofRailwayVehicleDesign1825~1960s,EmpiricalDesignPeriod1960~1990s,AnalyticalDesignPeriod1990~current,“Mehchatronic”DesignPeriodIntroductionEmpiricalDesignTalentGeniusexperienceprototypeimproveVeryslowIntroductionAnalyticalDesignConceptDesignSchematicDesignPPDesignPrototypeRunningExperimentCustomerScientist,ResearcherIntroductionAnalyticalDesign

ConceptDesign:principledesignSchematicDesignorTechnicalDesign(技术设计):includingKinetics,Dynamicsanalysis,toEvaluatetheridequality,runningsafety,brakingability;PPdesign(施工设计):CAD,CAM,CAE(mainlyincludingthepartsstrengthanalysis,usingFEMtechnology);Prototype:Testrigrunningtest,On-linetestevaluation;RunningTest:0.5millionKilometersrunningtest,Fatiguelifetest;Customers:Evaluationfromthepointviewofcustomers;

IntroductionMechatronicDesignMechanicalsystemTrackinputsVehicleoutputs(acceleration,displacement,etc)Monitoringsystem(sensors)ElectroniccontrollerActuatorsystemControlforcesDrivesignalsIntroductionMechatronicDesignActuatorsSensorsControllerLoadchangesBodyacceleration(minimise)Suspensiondeflection(constrain)Stability(constrain)Curvingperformance(optimise)VehiclesystemTrackfeatures(deterministic)Trackirregularities(stochastic)IntroductionMechatronicDesignIntroductionMechatronicDesignIntroductionContentsofthislesson

1.VehicleDynamics:BasicdynamicprinciplesSafetycriterionRideQuality2.StrengthAnalysisofRailwayVehicleParts:Forcesactedonparts,carbody,bogieFEManalysismethod,includingconstraints,forcesapplying,elementselection,meshingtechnique,etc.

PartI:VehicleSystemDynamicsIntroductionDamperSecondary

suspensionPrimarysuspensionPartI:VehicleSystemDynamicsIntroductionSecondary

suspensionPrimarysuspensionPartI:VehicleSystemDynamicsIntroductionBogiesPartI:VehicleSystemDynamicsIntroductionConed

wheelFlangeRailSleeperSolidaxlePartI:VehicleSystemDynamics§1CausesofVehicleVibrationRelatedtotrack1.Dippedjointsofrails

§1CausesofVehicleVibration2.TrackVerticalDeflection§1CausesofVehicleVibration3.TracklocalirregularitylateralcurvatureverticalcurvaturesuperelevationswitchrailcorrugationrailwearBallastirregularity(causedbytemperaturevariation)

§1CausesofVehicleVibration4.TrackRandomirregularityGage:(yl-yr)/2Crosslevel:(zl-zr)/2alignment:(yl+yr)/2VerticalProfile:(zl+zr)/2§1CausesofVehicleVibration4.TrackRandomirregularity§1CausesofVehicleVibration4.TrackRandomirregularityGage:

nominalgauge1435mm,,gaugewillbewidenedaccordingcurveradius(<600m),butshouldnotbegreater6mmthenthenominalvalue,and2mmlessthenthatvalue;Crosslevel:

在正线及到发线上,不得超出4mm,其他线上不得超出6mm;

alignment:

用10m弦线测量,正线不得超出4mm,站线及专用线不得超出6mm;VerticalProfile:

大修后旳线路,用10m弦线测量,正线不得超出4mm,站线及专用线不得超出6mm;§1CausesofVehicleVibrationRelatedtoVehicleEccentricWheelMassNon-uniformofWheelFlatWheelHuntingofTaperedWheelsetCausesRelatedtoVehicle

Eccentricwheel

verticalmovementofwheelsetaxlecenter:

V-vehiclerunningspeedr0–wheelnominalradiusT–timeelapsedW–wheelangularvelocityCausesRelatedtoVehicleMassnon-uniformUnbalancedforceproduced:Mw–wheelweight

θt–initialphaseanglev-vehiclerunningspeedr0–wheelnominalradiust–timeelapsedWhenrunningspeed>120Km/h,unbalancedvalueshouldbelessthen75g.m.

CausesRelatedtoVehicleFlatwheel

Whenwheelhasflatarea,momentumactedonwheel:Mw–wheelweight

V-vehiclerunningspeedItsperiodicaltime:CausesRelatedtoVehicleHuntingofTaperedWheelsetLateraldeflectionyYawangleCausesRelatedtoVehicleHuntingofTaperedWheelsetConed

wheelFlangeRailSleeperSolidaxleCausesRelatedtoVehicleHuntingofTaperedWheelsetDirectionoftravelCausesRelatedtoVehicleHuntingofTaperedWheelset当分析自由轮正确蛇行运动时,作如下假设:1、轮对无任何约束,单独在轨道上滚动;2、钢轨顶部呈刀刃状,而且是两根平行直线;3、轮对是两个对称锥体,轮轨间无任何相对滑动;4、不计轮对上旳任何作用力和惯性力;则经过推导,轮正确运动方程为:CausesRelatedtoVehicleHuntingofTaperedWheelsetwhere:V–Runningspeed;W-angularfrequency:b–halfofwheelsetnominalrollingradiusdistancer0–nominalrollingradius

λ0–effectivewheelconicity

CausesRelatedtoVehicleHuntingofTaperedWheelsetHuntingperiodicaltime:Huntingwavelength:

asbincreases,Lwincreases,soweakeristhehuntingThesametor0whenλ0increases,Lwdecreases,sostrongeristhehuntingCausesRelatedtoVehicleHuntingofTaperedWheelsetDirectionoftravelCausesRelatedtoVehicleHuntingofTaperedWheelsetThewheelsaremadeconical,thesmallercircumferenceattheouteredge.Thepairofwheelsarefixedtotheaxleandthusifanythingthrowsthewheelsintheslightestdegreetoonesidethewheelisimmediatelyrollingonalargercircumferencethantheotherandthetendencytorollbackisintroduced.Thecarriageiskeptalwaysinthemiddleofthetrack.Abeautifularrangement.Theflangesareanecessaryprecautionbuttheyoughtnevertotouchtherailandthereforetheycannotbesaidtokeepthewheelsontherails.Theyoughtnottocomeintoactionexcepttomeetanaccidental,lateralforce.IsambardKingdomBrunel–in1838:CausesRelatedtoVehicleHuntingofTaperedWheelsetGeorgeStephenson–in1821:Itmustunderstoodtheformofedgerailwaywheelsareconicalthatistheouterisratherlessthantheinnerdiameterabout3/16ofaninch.Thenfromasmallirregularityoftherailwaythewheelsmaybethrownalittletotherightoralittletotheleft,whentheformerhappenstherightwheelwillexposealargeandtheleftonesmallerdiametertothebearingsurfaceoftherailwhichwillcausethelattertoloosegroundoftheformerbutatthesameti

温馨提示

  • 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
  • 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
  • 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
  • 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
  • 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
  • 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
  • 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

评论

0/150

提交评论