先进制造技术复习题汇总.doc

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1、MODEL1ComputerAidedDesign—CAD1.WhafsthedefinitionofCAD?CADisanadvancedinformationhandlingtechnologytosolvedesignproblemsforengineers.CADcombinespeopledabilitiesofdeducingandcreationwithcomputer'sfunctionsofprocessingandinformationstorage（i

2、机辅助设计（CAD）的结合能力和创造打推导计算机的功能、信息存储处理）2.W

3、hat'sthehistoricaldevelopmentofCAD?（1）2DDrawingand3DWireframe（线框）modelingin1960s（2）Surfacemodeling（曲面造型）in1970s;（3）Solidmodeling（实体造型）in1980s;（4）Parameterizedandvariablemodeling（变量参数化建模）in1990s.3.Whatarethethreemethodsofproductdesigninclude?Pleasegivetheircharacterizes.RoutineD

4、esign（常规设计）:onlychangingsomeparametersInnovativeDesign（革新设计）:changingsomepartsCreativeDesign（仓U新设计）:developinganewproduct4.PleaseRivethephases（阶段）thatproductdesignprocessisdividedinto.DemandAnalysis—>ConceptualDesign—>DetailDesign^ProductionPlanning5.Whatarethethreephasesofconc

5、eptualdesign?Generate>Value>Select6.Whatarethtfunctions（功能）ofCAD?（1）Geometrymodeling（2）Designreviewandanalysis（3）Dynamicimitating（动态模拟）（4）Designdocumentation（设计文件编制）7.Whatarethethreemethodsofgeometrymodeling?Andgivethedisadvantageofeachmethod.WireframeModeling（线框建模）：Disadvantag

6、e:（l）Unabletoexpresscurvemodels（ilh线模型表达）（2）Amultivocal（多义的）modelAdvantage:Lessinformation;Lessstoragespace;Easydata-processing;Fastprocessingspeed;Lessneedofcomputerhardware.SurfaceModeling:disad：（l）Onlysuitableforshell（壳体）；（2）Noinformationaboutsolidorhollow,insideoroutside;（3

7、）Noinformationaboutqualityandvolume;（4）Unsuitableforanalysis.Ad：Morerigorousandintegrated;Findingintersectionpointsautomatically;Suitableforcomplicatedsurfacesuchascar'sbodyandplane'saerofoil.SolidModeling:disad:（l）Lackofengineeringinformation（tolerance（公差），roughness（粗糙度）,mater

8、ial（材料））；（2）CarffrealizeintegrationofCAD/CAM（不能实现CAD/CAM一体化）.Ad:Integralinformation（geometryandtopologicalinformation）;Removingelementsofhiding.8.Whatarethepopularmethodsofsolidmodeling?%1Constructivesolidgeometry（CSG）%1Sweeprepresentation9.HowdoesFEA（右限元分析）work?Andwhichparamet

9、ers（参数）doesFEAdemand?1）Breakinganobjectupintomanysmall