基于特征的整体叶盘CAD造型系统研究

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1、西北工业大学硕士学位论文(学位研究生)题目：基王挂堑的墼签吐盘￡塑造型丕统硒巍作者：型I型基～指导教师：墓蓥专业技术职务：—量堑±翌学科(专业)：煎窒主题剑造]：猩现代设计与集成制造技术教育部重点实验室AbstractBliskisoneofthemostimportantpartsintheaero—engine．Itiswildlyusinginenginefan，turbineandsoon。Thebliskisanewstructurewhichcallincreasecapabilit

2、y,predigeststructure，lowerwe!ight，reducefault，andimprovewearanddependabilityoftheengine．Bliskhasmultiplicitysharp，complicatedstructureandmanydimensions．AndpresentlydomesticbliskdesignistWO—dimensionaldesignbasedCADsoftware，whichcarlnotsatisfytheneeds

3、ofconcurrentdesign．Sothestructuraldesignisdi衢culttochangeanddesignprocessisverylong．Thethree-dimensionalparametricfeaturemodelingmethodbasedCADsoftware，whichcanrealizebliskfastmodeling，providesharablemodelforanalysisandmachining．Hencethecycleisshorte

4、nedInthispaper,thekeytechnologiesoftheaero—enginebliskarestudiedbasedonthedeepanalysisofthestructureanddesignmethodsaboutblisk．AmethodispresentedtOmakethestructuraldesignprocessbethree—dimensional，andasystemofbliskmodelingisprovided．Hencethecycleissh

5、o对ened．Somekeytechnologiesusedinthesystemareasfollows：Firstly,thestructureandmodelingmethodofbliskarestudied．Inthispaper,thestructureofbliskhasbeenconcludedandclassified，thatis，openingblisk．closingbliskandbig＆smallbladerotors．Alsothestructureandmodel

6、ingprocesshavebeenparticularlyanalyzed．Secondly,themodelingmethodofbliskbasedonthefeaturehasbeenstudied．Thebliskisdividedintotwomainpartsbasedonthebtisk‘Sfeature，Alsothetbaturedecompositionandsimplificationhavebeenmadefortheblisk。Meanwhile，usingthefe

7、aturemodelingmethod，theparametricmodelingforthebliskhasbeenmade．Intheprocessoftheblademodeling,thejoiningmethodisgiventocreatethesmoothsectionlinesofblade．TheSewmethod，ThroughCurvemethodandThrou曲CurveMeshmethodarepresentedtosolvethemodelingofbladesur

8、facewhichisafree3Dsurface．Thirdly,inthispaper,theBliskModelingCADsystemisdeveloped．UsingtheUGastheCADplatform，theseconddevelopmenthasbeenmade．TheprocessofthebliskdesignisintegratedintotheUIandtheCADsystemofbliskissetup．Also，theexamplesofthreerepresen