面向虛擬樣機的機械產(chǎn)品的三維表達技術(shù)的研究與實踐.pdf

1、重慶大學(xué)碩士學(xué)位論文面向虛擬樣機的機械產(chǎn)品的三維表達技術(shù)的研究與實踐姓名：劉保嘉申請學(xué)位級別：碩士專業(yè)：機械制造及其自動化指導(dǎo)教師：徐宗俊20020405英文摘要AbstractWiththedevelopmentoftechnologiesandtherequirementofsurvival，thetechnologyofvirtualprototypingisbeenregardedasoneofthekeymethodsthat

2、CanupgradetheircompetitionabilitybymanufacturingenterprisesUndoubtedlytheconstructionofdi西talmodelsofproductsisthebaseofthattechnologyThe3Dexpressionofproductsisthemergenceofdifferentdatafrommarketinginformation，existing

3、objectsandengineeringdrawingsandconstructionofdigitalmodels，Thethesisaddressesthetheoryandmethodsofthe3DexpressionofproductsfromdifferentdatasourcesTheauthorsummarizesthecharacteristicsofB6zierandNURBScurveandsurfaces，in

4、vestigatesthedatastructureof3Dmodels；Theprinciples，methodsandevaluationofthefairingofsurfacesandcurvesarealSOdiSCUSSedOnthefundamentaltheoryof3Dexpression，thecharacteristicsofengineeringdrawingsareanalyzed，withthedifficu

5、ltiesof3Dreconstructionbasedonengineeringdrawings；thealgorithmsofsurfaceblendingareinvestigatedasastrategyofsurfaceblendingisindicated；themethodsofavoidingdatadistortionarepresented，aftertheanalysisofIGESandSTEPformatand

6、theirapplicationinthedataexchangeamongheterogeneousplatforms；themethodsandprocessof3DexpressionbasedonengineeringdrawingareprovidedThecharacteristicsofreverseengineeringofrealpartsareinvestigated，withthemethodsofdataacqu

7、isition；thestrategiesandprocessofsurfaceconstructionbasedonlaserscannedpointcloudarepresented；theprocessof3Dexpressionbasedonrealpartsisindicated；themethodsofvariantdesignthroughreverseengineeringofrealparts；theprocessof

8、variantdesignbasedonassemblymodelsispresentedWiththeproject“TheConstructionofdigitalmockupforsomebrandofcar’’supportedbysomeautomobilecorporation，Ltdandtheproject“TheRapidDevelopmentandVariantDesignofsomebrandofmotorcycl

9、e’’supportedbysomemotorcyclecorporation，theauthorsummarizestheexperienceof3一Dreconstructionforvirtualprototyping，andprovidessoundprooffortheviewpointsinthethesisKeywords：virtualprototyping，fairing，mastermodel，pointcloudI