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毕业设计（论文）版权使用授权书本毕业设计（论文）作者完全了解兰州交通大学有关保留、使用毕业设计（论文）的规定。特授权兰州交通大学可以将毕业设计（论文）的全部或部分内容编入有关数据库进行检索，并采用影印、缩印或扫描等复制手段保存、汇编以供查阅和借阅。同意学校向国家有关部门或机构送交设计(论文)的复印件和电子文档。（保密的毕业设计（论文）在解密后适用本授权说明）毕业设计（论文）作者签名：指导教师签名：签字日期：年月日签字日期：年月日本科毕业设计(论文)动车组车体三维设计EMUBodyThree-dimensionalDesign兰州交通大学本科毕业设计（论文）I摘要近年来，随着中国国民经济水平的提高，人们对列车的运行速度、舒适性、安全性的要求越来越高，进而刺激了我国动车组行业的发展。铁路第六次提速调图后，“和谐号”CRH系列动车组成为我国中东部地区铁路运输的主角；目前，在我国既有线上的动车组车型主要有：CRH1、CRH2、CRH3和CRH5等；此外，我国的高速铁路也蓬勃发展，多条客运专线也都在建，已投入运行的部分区段最高运行速度已突破300km/h。总而言之，中国铁路正在发生着天翻地覆的变化。本论文以CRH3型动车组中间车体为研究对象，首先对该型动车组做一个简单的介绍，了解它的国外背景、在中国的生产厂家，以及它的结构特点和编组方式等；其次，重点介绍CRH3型动车组的车体，介绍它的结构特点、选用材料的种类及该材料的特点。在此基础上，利用三维建模软件SolidWorks建立实体模型，在设计建模的过程中，介绍组成车体的车顶、侧墙和底架等部件的结构特点以及重要部位的建模过程；此外，介绍目前应用于车体的相关技术，例如：轻量化、流线形、密封性和降声隔噪等。设计建模完成之后，对动车组受电弓的结构做一个简单介绍，另外对目前各型动车组常用的受电弓列举一下。关键词：动车组；铝合金车体；受电弓；三维设计动车组车体三维设计-II-AbstractInrecentyears,withtheimprovementofthelevelofChina'snationaleconomy,peopletrainspeed,comfort,safetyrequirementsarehigh,soastostimulatethedevelopmentofChinaEMUindustry.Afterthesixthrailwayspeedincreaseanddiagramadjustment,HarmonyCRHseriesEMUconsistingoftheeasternrailtransportprotagonist;currently,inourexistinglineofEMUmodelsaremainly:CRH1,CRH2,CRH3andCRH5etc;inaddition,China'shigh-speedrailwayisalsobooming,multi-passengerlinearealsounderconstruction,partofthesectionhasbeenputintooperationhasexceededthemaximumoperatingspeedof300km/h.Allinall,China'srailwayisundergoingtremendouschanges.Inthispaper,anintermediateCRH3EMUbodyforthestudy,thefirstoftheEMUtomakeabriefintroduction,understandingitsforeignbackground,Chinesemanufacturers,aswellasitsstructuralcharacteristicsandgroupingmethods;secondly,focusesonthebodyCRH3typeEMU,introducesitsstructuralcharacteristics,thetypeofmaterialselectionandcharacteristicsofthematerial.Onthisbasis,theuseofthree-dimensionalmodelingsoftwareSolidWorkssolidmodelissetinthedesignprocessmodeling,weintroducethestructuralcharacteristicsofthecompositionofthevehicleroof,sidewallsandthebasechassisandothercomponentsaswellasimportantpartsofthemodelingprocess;furthermoreintroducescurrentlyusedinvehicle-relatedtechnologies,suchas:lightweight,streamlined,reducingacousticnoise-isolatingandsealingthelike.Afterthecompletionofthedesignmodel,thestructureofEMUpantographmakeabriefintroduction,inadditiontovarioustypesofcurrentEMUconventionalpantographincludeit.KeyWords:EMU,Aluminumbody,Pantograph,Three-dimensionaldesign兰州交通大学本科毕业设计（论文）-III-目录摘要.....................................................................................................................................IAbstract.....................................................................................................................................II目录..................................................................................................................................III1绪论.........................................................................................................................................11.1论文的选题背景和研究意义......................................................................................11.1.1选题背景..........................................................................................................11.1.2研究意义..........................................................................................................31.2国内外研究现状.........................................................................................................31.3论文的主要研究内容..................................................................................................42CRH3型动车组......................................................................................................................52.1CRH3动车组原型.......................................................................................................52.2CRH3动车组分类.......................................................................................................52.3CRH3动车组车体结构...............................................................................................62.3.1车体承载结构..................................................................................................73铝合金车体..........................................................................................................................103.1国内外铝合金车体发展现状...................................................................................103.1.1国外铝合金车体发展现状............................................................................103.1.2国内铝合金车体发展现状............................................................................103.2铝合金车体的特征....................................................................................................113.3高速铁路客车车体用的铝合金材料.......................................................................113.4铝合金车体材料的特点...........................................................................................113.4.1挤压特点........................................................................................................113.4.2铝合金材料的焊接性能........................................................