R12-03-geometric_modeling

©2009ANSYS,Inc.Allrightsreserved.113ANSYS,Inc.Proprietary©2009ANSYS,Inc.Allrightsreserved.113ANSYS,Inc.ProprietaryModelBuilding–GeometricModelling©2009ANSYS,Inc.Allrightsreserved.114ANSYS,Inc.ProprietaryTopics•ObjectShapesinIcepak•Editingfunctions•Alignmentfunctions•Units•SnaptoGrid©2009ANSYS,Inc.Allrightsreserved.115ANSYS,Inc.Proprietary©2009ANSYS,Inc.Allrightsreserved.115ANSYS,Inc.ProprietaryShapes©2009ANSYS,Inc.Allrightsreserved.116ANSYS,Inc.Proprietary3Dshapes•Prism•Cylinder:uniform/non-uniform•Polygon:uniform/non-uniform•BlockscanbeEllipsoid/EllipticalCylinder2Dshapes•Rectangular•Circular•Inclinedrectangular•PolygonPlatesOpeningsGrillesWallsFansSourcesBlocksResistancesHeatExchangerAllowableShapeTypesinIcepakCompoundObjects(PCB,Heatsink,Blower…)©2009ANSYS,Inc.Allrightsreserved.117ANSYS,Inc.ProprietaryRectangularInclinedCandefinebystart/angleaswellasdefaultoptionsChangeangledirectionPositiondefinedbyco-ordinatesoftwopointsonthediagonal2D-Shapes©2009ANSYS,Inc.Allrightsreserved.118ANSYS,Inc.ProprietaryPolygonalCircularOptionstoincrease/decreasenumbernumberofverticesSelect-selectvertexlocationwithmouseSelectoptionsformouseFanscanalsohaveaninnerradiusforthehub2D-Shapes(2)©2009ANSYS,Inc.Allrightsreserved.119ANSYS,Inc.ProprietaryRegularPrismPolygons-Uniform(highandlowfaceidentical)Polygons-Non-Uniform(highandlowfacenotidenticalbutparallel)Topandbottomfacescanhavedifferentnumberofvertices-butmustbeparallelSamevertexoptionsasfor2D-polygonalobjects3D-Shapes©2009ANSYS,Inc.Allrightsreserved.120ANSYS,Inc.ProprietaryUniformCylinder-noinnerradiusUniformCylinder-withinnerradiusNon-UniformCylinder-withinnerradiiInnerRadiussettomodelannulusOuterandInnerRadiiontopandbottomofcylindercanbedifferent3D-Shapes(2)©2009ANSYS,Inc.Allrightsreserved.121ANSYS,Inc.Proprietary©2009ANSYS,Inc.Allrightsreserved.121ANSYS,Inc.ProprietaryEditingObjects©2009ANSYS,Inc.Allrightsreserved.122ANSYS,Inc.ProprietaryAlteringthegeometryofanobject•Theshape,position,sizeandorientationofanobjectcanbemodifiedusinganyofthefollowingmethods:•FromtheCurrentObjectGeometry(COG)window–LocatedatthebottomrighthandcorneroftheGUI•Fromthecurrentobject’seditform/geometrysection•WiththemouseintheGUI•Geometryofanobjectincludes:•Shape•Positionand/orSize•LocalCo-ordinates•Plane/Orientation©2009ANSYS,Inc.Allrightsreserved.123ANSYS,Inc.ProprietaryCurrentobjectCurrentObjectGeometry(COG)Section•Currentobject’sgeometricdetailsaredisplayedinthebottomrighthandcorneroftheGUI•ClickonApplyorEnterthekeyboardaftermakingthechanges©2009ANSYS,Inc.Allrightsreserved.124ANSYS,Inc.ProprietaryName,GroupandShapeCoordinatesmaybeenteredbystart/endorstart/lengthOptionsto:Applychanges,Resettodefaults,orEditobjectformCurrentObjectGeometrySection©2009ANSYS,Inc.Allrightsreserved.125ANSYS,Inc.ProprietaryEditingPreferences•Defaultdimensionspecification•Start/end•Start/length©2009ANSYS,Inc.Allrightsreserved.126ANSYS,Inc.ProprietaryObjectModification•OpensuptheEditpanelfortheselectedobjectPlacestheselectedobject(s)inthetrashcan•OpensuptheMovepanelfortheselectedobject(s)•Fromthemovepanel,youcan•Scale•Mirror•Rotate•Translate•OpensuptheCopypanelfortheselectedobject(s)•Youcangroupthecopies,andalsohavesamefunctionalityasmoveavailabletoyouModifyingObjects©2009ANSYS,Inc.Allrightsreserved.127ANSYS,Inc.ProprietaryMouseFunctionsShift+dragleftSelectsobjects–clickedgetoselectsingleobject,DragaboundingboxtoselectmultipleobjectsTranslateobjectsShift+dragmiddleResizeobjectShift+dragrightRESIZINGANDPOSITIONINGFUNCTIONSRotatemodelin3DTranslatemodelZoom-in/zoom-outRotatemodelin2DplaneofthescreenDragleftDragmiddleDragright–up/downDragright–left/rightMODELORIENTATIONFUNCTIONS©2009ANSYS,Inc.Allrightsreserved.128ANSYS,Inc.ProprietarySelectingAssemblies-Mouse•LeftClickonanassemblyedgewillselecttheassembly•Inadditiontoselecting,thiswillopentheassemblybranchintheModelManager•Objectsintheassembliescanbeselectedonlyafteropeningtheassemblybranch•Objectsinclosedassemblybrancharenotvisible,hencecannotbeselected•Ifanedge/faceissharedbytheassemblyandobjectsinside,selectingthatedgewilltogglebetweenalledges/faces/objects–includingtheassemblyitself–thatsharetheedge©2009ANSYS,Inc.Allrightsreserved.129ANSYS,Inc.Proprietary“In-line”Edges:objectsdonottouch,butedgesalignedinoneorientationXYZY“Aligned”Edges(Objectstouch,neednotbethesamesize)“Matched”EdgesAlignmentPossibilities©2009ANSYS,Inc.Allrightsreserved.130ANSYS,Inc.Proprietary•Geometricmodificationsdonewiththemousecancontrolledtobecontinuousorfixedtoagrid(digitized).•Continuousmovement•oftencreatesunwantedsmallgapsandoverlapsbetween“inline”edges,or“aligned”edges•canleadtounnecessarycellbleeding•Fixingthemousetosnaptoagridovercomestheseproblems–sosetasnapgridtoensuremousemovesbysay0.1mmatatime.Gap:0.104mmOveralp:0.094mmMouseMovementControls©2009ANSYS,Inc.Allrightsreserved.131ANSYS,Inc.ProprietarySettinganInteractiveGridEditmenuPreferencesOptionsInteractionActivatetheX-grid,Y-gridand/orZ-gridSpecifyappropriatevaluesforLeastCount©2009ANSYS,Inc.Allrightsreserved.132ANSYS,Inc.ProprietaryD