ICEM11.0培训资料2

11.0NewFeatures1/10/2007©2006ANSYS,Inc.Allrightsreserved.11.0NewFeaturesANSYS,Inc.ProprietaryInventory#0023821-1GeometryHandling1/10/2007©2006ANSYS,Inc.Allrightsreserved.Inventory#0023821-211.0NewFeaturesANSYS,Inc.ProprietaryTrainingManualANSYSv11.0Anaccuratesolutionreflectstheunderlyinggeometry.Togetsuch,ICEMCFDprovides:•Geometryimport–DirectlyfromCADpackage–3rdpartyformats–viaWorkbench/DesignModeler•Surfacegeometrykernel–Importedsolidsareconvertedtosurfaces•ManyinternalCADtools–Geometrycreation–Geometrymodification–GeometryfixingGeometryhandlingThisJetenginemodelwithfunctioningthrustreverserswasbuiltwithICEMCFDgeometrytools1/10/2007©2006ANSYS,Inc.Allrightsreserved.Inventory#0023821-311.0NewFeaturesANSYS,Inc.ProprietaryTrainingManualANSYSv11.0GeometryImportCADfromjustaboutanysource•DirectCADInterfaces–SetupICEMCFD/AI*EmeshingrequirementswithinCADenvironment•SavedwithinCADpart•Retainedforparametricgeometrychanges–DirectlywriteoutICEMformattedgeometry(tetinfile)•No3rdpartyexchange(clean!)–ProE–Unigraphics–SolidWorks•Directimport–ACIS(.sat)–CATIAV4–DWG/DXF–STEP/IGES–Pro/E♫–Unigraphics♫–CatiaV4–SolidEdge–IDEAS–GEMS–IDEAS(IDI)–Parasolid•♫Pro/EandUGdirectimportrequiresactualCADlibraries;actualCADsoftwareandlicensingmustbeavailable1/10/2007©2006ANSYS,Inc.Allrightsreserved.Inventory#0023821-411.0NewFeaturesANSYS,Inc.ProprietaryTrainingManualANSYSv11.0GeometryImport-othersourcesWhenCADisnotavailable,anoldlegacymodelorthex-rayscanofthepartcanbeimportedasgeometry.Thisinputisacollectionoffacets.•FacetedData–Nastran–Patran–Othersolverformats(indirectlyfrommeshconversion)–STL(mostcommon)–VRML•FormattedPointData–Autocurve/surfacecreation1/10/2007©2006ANSYS,Inc.Allrightsreserved.Inventory#0023821-511.0NewFeaturesANSYS,Inc.ProprietaryTrainingManualANSYSv11.0OpenGeometry•Geometrysavedas“tetin”(*.tinfile)–Legacynameasanabbreviationof“tetrainput.”–Surfacegeometrykernel•Anyimportedsolidmodelsarerepresentedasaseriesofwatertightsurfaces–Surfacesareinternallyrepresentedastriangulateddata•ResolutionorapproximationoftruesplinesurfacedatasetbyTriangulationTolerance•Smallervalue=betterresolution•0.001worksbestformostmodels•Allowsforfastermeshcomputation/projection•Notusedifsurfacesarealreadyfacetized(e.g.STL,VRML)1/10/2007©2006ANSYS,Inc.Allrightsreserved.Inventory#0023821-611.0NewFeaturesANSYS,Inc.ProprietaryTrainingManualANSYSv11.0BasicGeometryCreationTools•ScreenSelect•ExplicitCoordinates•BasePointandDelta•Centerof3Points•ParameterAlongaVector•CurveEnds•Curve-CurveIntersection•ParameteralongaCurve•ProjectPointtoCurve•ProjectPointtoSurface•FromPoints•ArcThrough3Points•ArcfromCenterPoint/2PointsonPlane•SurfaceParameter•Surface-SurfaceIntersection•ProjectCurveonSurface•SegmentCurve•ConcatenateCurves•SurfaceBoundary•ModifyCurves–Reversedirection–Extend–Matchcurves–Bridgecurves•FromCurves•CurveDriven•SweepSurface•SurfaceofRevolution•OffsetSurface•Midsurface•Adjustvaryingthickness•LoftSurfaceOverSeveralCurves•CurtainSurface•Segment/TrimSurface•Merge/ReapproximateSurface•GeometrySimplification–ConvexHull–CartesianShrinkwrap•CreateStdGeometry–Sphere–Box–Cylinder–Plane–Disc–Trimnormaltocurve1/10/2007©2006ANSYS,Inc.Allrightsreserved.Inventory#0023821-711.0NewFeaturesANSYS,Inc.ProprietaryTrainingManualANSYSv11.0FacetedHandling•ConvertfromB-spline•CreateCurve•Movenodes•Mergenodes•Createsegment•Deletesegment•Splitsegment•Restrictsegments•Movetonewcurve•Movetoexistingcurve•ConvertfromB-spline•CoarsenSurface•CreateSurface•MergeEdges•SplitEdges•SwapEdges•MoveNodes•MergeNodes•CreateTriangles•DeleteTriangles•SplitTriangles•RestrictTriangles•Movetonew/existingPart•MergeSurfacesCreate/ModifyFaceted•AlignEdgetoCurve•CloseFacetedHoles•TrimbyScreenLoop•TrimbySurfaceLoop1/10/2007©2006ANSYS,Inc.Allrightsreserved.Inventory#0023821-811.0NewFeaturesANSYS,Inc.ProprietaryTrainingManualANSYSv11.0GeometryHandling•BuildDiagnosticTopology•CloseHoles•RemoveHoles•Stitch/MatchEdges•Surfaceextension•Un-trimsurface•Splitbycurvature•Modifysurfacenormals•Boltholedetection•Buttondetection•Filletdetection•Translate•Rotate•Mirror•Scale•Translate&Rotate–ThreePoints–CurvetoCurve•Curves/pointsoriginallymadeinactive-ignoredbymeshingtools•Restoretoactivateagain-seenasconstraintsbymeshingtoolsRestoreDormantEntityTransformationToolsRepairGeometry•Delete•Points•Curves•Surfaces•Bodies•AnyEntity1/10/2007©2006ANSYS,Inc.Allrightsreserved.Inventory#0023821-911.0NewFeaturesANSYS,Inc.ProprietaryTrainingManualANSYSv11.0BuildingTopology•Todiagnosepotentialgeometryproblems•Automaticallybuildcurvesandpointsformeshingconstraints•Geometry-RepairGeometry-BuildDiagnosticTopology–Tolerance•Proximityofsurfacestooneanother•Sizeshouldbesetreasonablytoignoresmallgaps,butnotallowleakageorremoveimportantfeatures•Connectivityissetupbetweensurfaceedgesthatmeetwithinthetolerance–Filterbyangle•FilterPoints:Pointsbetweentwocurveswhosetangencyisbelowthefeatureanglewillbe“filteredout”(madedormant)•FilterCurves:Curvesbetweentwosurfaceswhosetangencyisbelowthefeatureanglewillbe“filteredout”(madedormant)Tolerance