1 Importing and Repairing CADWord格式文档下载.docx

1 Importing and Repairing CADWord格式文档下载.docx

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ThebenefitsofimportingandrepairingCADare:

Correctinganyerrorsinthegeometryfromimport

Creatingthesimplifiedpartneededfortheanalysis

Meshingapartallatonce

Ensuringproperconnectivityofmesh

Obtainingadesirablemeshpatternandquality

Exercise:

ImportingandRepairingCADGeometryData

Thisexerciseusesthemodelfile,clip_repair.hm.

Step1:

Openandviewthemodelfile,clip_repair.hm.

Step2:

Viewthemodelintopologydisplaytoolbarandshadedmodetoevaluateitsintegrity.

1.

Observewherethemodelhasincorrectconnectivityandmissingorduplicatesurfaces.

2.

Gototheautocleanuppanel.

Notethatthesurfaceedgesarenowcoloredaccordingtotheirtopologystatus.ThisoccursbecauseGeometryColorissettoauto（

）. 

3.

ClickWireframeGeometry（

）andShadedGeometryandSurfaceEdges（

）toexplorethedifferentdisplaymodes.

Thetoolbarcontainsiconsthatcontrolthedisplayofthesurfacesandsurfaceedges.Surfacescanbeshadedwithorwithoutedgesorwireframe.Right-clicktheiconstoaccessthedrop-downmenuforadditionaloptions.Placeyourmouseoverthecursortoviewadescriptionofthebutton’sfunctionality.

4.

ClickVisualization（

）andnavigatetotheTopologytab.

Visualizationcontrolsthedisplayofthesurfacesandsurfaceedges.Surfacescanbeshadedorwireframe.Thecheckboxeswithinthismenuturnthedisplayofthedifferentedgetypesandfixedpoints（surfacevertices）onoroff.

5.

ClearallthecheckboxesexcepttheFreecheckbox.

Onlythefreeedgesshouldbedisplayedatthispoint.

6.

Observethefreeedgesandmakenoteofwheretheyare.

Thefree（red）edgesshowwherethereisincorrectconnectivityorgaps.

7.

Notethelocationswherethereareclosedloopsoffreeedges.Thesearelocationsthatprobablyhavemissingsurfaces.

Freeedgesindicatingsurfacediscontinuitiesoftheclipgeometry

8.

SelectonlytheNon-manifoldcheckbox.

9.

Observethenon-manifoldedgesandmakenoteofwheretheyare.

Thenon-manifoldedgesshowwheretherearemorethantwosurfacessharinganedge,whichmightindicateincorrectconnectivity.Forthispart,thereareyellowedgescompletelysurroundingtwoareas.Thisindicatesthatthereareprobablyduplicatesurfacesintheselocations.

10.

Selectallthecheckboxes.

11. 

ClicktheClosebuttontoclosetheVisualizationtab.

12.

ClickShadedGeometryandSurfaceEdges（

）

Thesurfacesshouldnowappearsolidratherthanhavingonlytheiredgesdisplayed.

13.

Rotate,zoom,andpantolocateanyerrorsinthegeometry.

14.

Makenoteoftheareastobeworkedon:

Asurfacethatoverhangsaroundcorner

Amissingsurface

Surfaceoverhanginganedgeandamissingsurface

Anedgethathasapparentlybeencollapsed

Areaofcollapsededge

）toswitchbacktowireframemode.

Step3:

Deletethesurfacethatoverhangstheroundcorner.

EntertheDeletepanelinoneofthefollowingways:

FromtheGeometrymenu,pointtoDeleteandclickSurfaces

PressF2

Inthegraphicsarea,selecttheoverhangingsurfaceshowninthepreviousfigure.

Clickdeleteentityandclickreturn.

Returntothemainmenu.

Step4:

Createsurfacestofilllargegapsinthemodel.

Accessthesurfacespanel.

Accessthespline/fillersub-panel.

Clearthekeeptangencycheckbox.

Thekeeptangencyoptionexaminessurfacesattachedtotheselectededgesandtriestocreateasurfacetangenttothem.Thishelpstoformasmoothtransitiontothesurroundingsurfaces.

Verifytheentitytypeissettolines.

Verifytheautocreate（freeedges）checkboxisselected.

Theautocreateoptionsimplifiestheselectionofthelinesboundingthemissingsurface.Oncealineisselected,HyperMeshautomaticallyselectstheremainingfreeedgesthatformaclosedloop,andthencreatethefillersurface.

Zoomintotheareaindicatedinthefollowingimage.

Areaofmissingsurfaces

Pickoneoftheredlinesboundingoneofthegaps（missingsurfaces）.

HyperMeshautomaticallycreatesafillersurfacetoclosethehole.

Repeatsub-step4.7tocreateafillersurfaceintheothergap. 

Clickreturn.

Step5:

Settheglobalgeometrycleanuptoleranceto.01.

PressOtogototheoptionspanel.

Gotothegeometrysub-panel.

Inthecleanuptol=field,type0.01tostitchthesurfaceswithagaplessthan0.01.

Clickreturntogotothemainmenu.

Step6:

Combinemultiplefreeedgepairsatonetimewiththeequivalencetool.

Entertheedgeeditpanelinoneofthefollowingways:

FromtheMenuBar,selectGeometry,thenEdit,thenedges

Fromthemainmenu,selectGeomPage,thenchooseEdgeEdit

Gototheequivalencesub-panel.

Activatetheequivfreeedgesonlycheckbox.

Selectsurfs>

all.

Verifythatthecleanuptol=issetto0.01,whichistheglobalcleanuptolerancespecifiedintheoptionspanel.

Clickthegreenequivalencebuttontocombineanyfreeedgepairswithinthespecifiedcleanuptolerance.

Mostoftheredfreeedgesarecombinedintogreensharededges.Thefewremainingarecausedbygapslargerthanthecleanuptolerance.

Step7:

Combinefreeedgepairs,onepairatatime,usingthetoggle.

Gotothetogglesub-panel.

Inthecleanuptol=field,type0.1.

Inthegraphicsarea,clickoneofthefreeedgesshowninthefollowingimage.

Rotateandzoomintotheareaifneeded.Whentheedgeisselected,itwillchangefromredtogreen,indicatingthatthefreeedgepairhasbeenequivalenced.

Areawherefreeedgesneedtobetoggled

Usetoggletoequivalencetheotheredgesshownintheimage.

Step8:

Combinetheremainingfreeedgepairusingreplace.

Gotothereplacesub-panel.

Clickuserviews（

）.

Clickrestore1tobringbackthesavedview.

Withtheselectorundermovededge:

active,clicktheleftmostfreeedgeinthegraphicsarea.

Verifythattheselectorunderretainededge:

isnowactive.

Selecttherightmostrededge.

Inthecleanuptol=field,enter0.1.

Clickreplace.

Oncethelineisselected,HyperMeshpostsamessagesimilarto:

"

Gap=（.200018）.Doyoustillwishtotoggle?

ClickYestoclosethegap.

Edgestoretainandmoveforreplacement

Step9:

Findanddeleteallduplicatesurfaces.

Youshouldstillbeinthegeomcleanuppanel.

AccesstheDefeaturepanelinoneofthefollowingways:

FromtheMenuBar,chooseGeometry,thenDefeature

Fromthemainmenu,chooseGeomPage,thenDefeature

Gototheduplicatessub-panel.

Selectsurfaces>

displayed.

Inthecleanuptol=field,type0.01.

Clickfind.

Thestatusbardisplaysthefollowingmessage,"

2surfacesareduplicated."

Clickdeletetoremoveanyduplicatesurfaces.

Step10:

Observethemodelagaintoidentifyanyremainingfreeedges,ormissingorduplicatesurfaces.

Usethetopologydisplayandshadedmodestoperformthistask. 

Alloftheedgesinthemodelshouldbedisplayedasgreensharededges,indicatingthatwehaveacompletelyenclosedthinsolidpart.

Step11（Optional）:

Saveyourwork.

Withthecleanupoperationscompleted,savethemodel.

GotoHyperMeshTutorials