3D8 Using the TetraMesh Process Manager.docx

3D8 Using the TetraMesh Process Manager.docx

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3D8UsingtheTetraMeshProcessManager

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UsingtheTetraMeshProcessManager-HM-3270

Inthistutorial,youwilllearnaboutusingtheTetraMeshProcessManagerto:

•

ImportgeometryoranHMFile

•

Cleanupthegeometry

•

Organizethemodel（holesandfeatures）

•

Establishmeshsizeandpatternfortheorganizedgeometry

•

2-DMesh

•

Cleanupthe2-Dmesh

•

TetraMesh

TheProcessManagerisastep-by-steptoolprovidingachecklistofprocedurestoallowtheusertoquicklyorganizeandtetmeshageometricmodel. Eachstepisprovidedinahierarchallistprovidingtheorderinwhichtheprocessneedstobeperformedandprovidingspecializedtoolsateachsteptosimplifytheprocess. Thesesteps,whiletheycanbedonemanually,canbeperformedintheTetraMeshProcessManagertemplateinamuchreducedtimeframe.

Exercise

Step1:

 InitiatetheProcessManager.

1.

FromtheMenuBar,selectMesh,thenCreate,thenTetraMeshProcess,thenCreateNewtoaccesstheProcessManager.

2.

Enterasessionnameorleaveitasmy_session.

Note:

Creatingasessionnameandsavingthesessionallowstheusertostoptheprocessbeforecompletionandthenloaditagainatalatertime,pickinguptheprocessatthepointitwasleftoff.

3.

Selectaworkingfolder.

4.

ClickCreate.

Step2:

 Importgeometry.

AtthispointtheTetraMeshProcesstabwillopenintheTabareaandwillautomaticallyassembletheTetraMeshProcessFlow. Thefirststep,GeometryImport,ishighlightedandthepanelareahasbeenconfiguredwithspecificpanelsforaidingtheTetrameshProcessManagertemplate. YoucanswitchbacktothenormalHyperMeshpanelareausingtheProcessManagerTaskicon（

）. Right-clickitandselecttheHyperMeshPanelicon. YoucangobacktotheProcessManagerpanelsagainbyinsteadselectingtheProcessManagericon.

1.

Inthepanelarea,changetheImportTypetoHMModel.

2.

Onthetoolbar,clickOpen.hmFile（

）andselectthefiletetmesh_pm.hmfrom\tutorials\hm\.

3.

ClickImport.

ThemodelwillimportandagreencheckwillappearnexttoGeometryImportintheProcessManagerindicatingthatstepisnowcomplete.

Step3:

Cleanupthegeometry.

1.

FromtheGeometryColorModeselector（

） pickByTopoandclickShadedGeometry（

）.

2.

Inthepanelarea,selecttheEdgeToolstab.

3.

ClickIsolate.

Thiswillisolatethesurfaceswithfreeedgesonthem.

IsolatedSurfaceswithfreeedges.

4.

SelecttheFreeEdgestabandclickEquivalence.

Thiswillfixallthefreeedges. Ifthisdidnotcorrectallofthefreeedges,theTolerancevaluecouldbeincreaseduntilallfreeedgesareequivalenced.

5.

SelecttheEdgeToolstabandclickIsolateagain.

Awindowshouldappearwiththemessage,“Noedgesfound…”Thisconfirmsalledgeshavebeenfixed.

6.

ClickDisplayAll.

7.

ClickACCEPT.

TheGeometryCleanupstephasbeencompletedandshouldhaveagreencheckmarkbyit.

Step4:

OrganizeandCleanupholes.

Thisstepwillallowyoutoorganizethesurfacesthatformholesinthemodel. TheTetraMeshProcessManagercanautomaticallysortandorganizeholesintoseparatecomponentcollectorsbasedupontheirdiameter. Thiswillallowyoutospecifymeshtype,circumferenceelementcount,andlongitudinalelementsizefordifferentholegroups.

1.

Inthepanelarea,clickthe+（

）button.

Thiswilladdathirdlinetothetable.

2.

Onthefirstline,enter3.3intotheD

Thiswillorganizeallholeswithadiameterbetween0and3.3units,asindicatedbytheRangefield,intoacollector.

3.

Enter5intothesecondrowand10intothethird.

ThiswillallowHyperMeshtoorganizetheholesintothreecollectorsthatwillincludeholesrangingfrom0-3.3units,3.3-5unitsand5-10unitscollectively.

4.

ClickAutoOrganize.

Alloftheholesinthemodellessthan10unitswillnowbeorganizedintothreecomponentcollectors,eachwithadifferentcolor.

5.

ClicktheModeltabandexpandtheselection.

Youwillseethreenewcomponentcollectorswiththenamesolidholesfollowedbythenumericalaverageofthediameterrangeoftheholesorganized.

Transparentviewofmodelshowingallholesandboresorganized

6.

ReturntotheTetraMeshProcesstab

7.

IntheNumCircumferenceElemsfieldenter12foreachrow.

8.

IntheLongitudinalElemSizefieldenter1foreachrow.

TheNumCircumferenceElemsfieldgovernsthenumberofelementsthatwillbemeshedaroundtheholewhiletheLongitudinalElemSizefielddictatestheunitsizeoftheelementsthroughthelengthofthehole.

9.

ClickACCEPT.

TheOrganize&CleanupHolesstepisnowcompleteshouldnowhaveagreencheckmarknexttoit.

Step5:

Meshholes.

1.

InthepanelareayouwillnoticethateachholediameterrowhasaMeshTypefieldwithapull-downprovidingtheoptionsofR-triaregularandR-triaunionjack. VerifythatallaresetforR-triaregularandclickMeshAll. （TheR-triaunionjackmeshpatternwillbediscussedinalaterstep.）

Youwillnoticethisprocessprovidesaperfectlystraighttriameshdownthelengthoftheholewithnotwisting.

2.

ClickACCEPT.

ThecheckmarkintheMeshHolesstepwillnowturngreen.

Step6:

Organizeandcleanupfeatures.

Thisstepallowsyoutohighlightandorganizefeaturesthatrequirespecificmeshcontrolsbeyondtheoverallmeshpatternthatwillbeappliedtotheremainderofthepartinalaterstep. Thisorganizationaltoolwillplacetherequiredsurfacesintotheirowncollectororcollectorsandallowyoutosetmeshsizeandpatternrequirementsforeach.

1.

Inthepanelarea,clickthe+（

）button.

2.

IntheDefineNewwindowthatopens,typeFacesandclickOK.

3.

Selectallfiveoftheflatfacesaroundthecircumferenceofthepartasshowninthefollowingimage.

4.

Clickproceed.

Facesthatneedtobepicked

ThepanelwillswitchtotheOrganizepanelwithyoursurfacespre-selectedtomoveintoanewcomponentcalledgrp_Faces.

5.

Clickmove,thenreturn.

6.

Clickthe+（

）buttonagain.

7.

IntheDefineNewwindowthatopens,typeTopHoleandclickOK.

8.

Rotatethemodelsoyouarelookingatitfromunderneathintothecenter,andselectthesurfacesshowninthefollowingimage.

Note:

Withthistoolyouneedonlyselectoneofthetwosurfacesthatmakeupacylinder;whenyouclickproceedHyperMeshwillautomaticallyselecttheothersurfaces.

9.

Clickproceed.

10.

IntheOrganizepanel,clickmove,thenreturn.

Yourmodelshouldthenlooksimilartothefollowingimage,withthefacesinonecollectorandthetopholeinanother. Yourcolorsmayvaryslightly.

11.

ClickACCEPT.

Step7:

Organizeandcleanupfilets.

Oftenabettermeshcanbeachievedifyourfilletsaresplitdownthecenter. Thestepwillallowyoutoautomaticallysplityourfilletsbasedonminimumandmaximumradiuscriteria.

1.

ClickComponents.

2.

Selectthepartinanareathathasnotbeenorganizedintoanewcomponentsothatthelargepurplepartisselected.

3.

Clickproceed.

4.

LeavetheMinRadiusat0andtheMaxRadiusat5andmakesuretheSuppressFilletTangentEdgesoptionisactive.

5.

ClickCleanup.

Youwillnoticethatmanyofthefilletsnowhaveanedgerunningdownthecenterandtheoriginaledgesaresuppressed.

6.

ClickACCEPT.

Step8:

Meshfeatures.

InthisstepyouwillmeshthefeaturesthatyouorganizedinStep6. Thepanelareawillshowatablewithyourorganizedfeaturesinitandwillgiveyoutheoptionofselectingameshtypeandsizeforeachfeature.

1.

FortheFacesfeature,clickthepull-downunderMeshTypeandpicktrias.

2.

InthefieldunderElemSize,enter0.5.

3.

FortheTopHolefeature,selectR-triaunionjackfortheMeshType.

4.

ForElemSize,enter0.5.

5.

ClickMeshAll.

6.

NotethedistinctiveUnionJackmeshpattern（

）inthetopholeareaandtheconnectivityofthemeshtothepreviouslymeshedholes.

7.

ClickACCEPT.

Step9:

Organizeandcleanup.

Thisstepallowstheusertoorganizeandcleanuptheremainingportionofthemodelthatwillthenfallundertheglobalmeshingparameters. Astheremainingsurfacesarealreadyinthecomponentyouwishthemtobein,thereisnoneedforfurtherorganization.

1.

ClickACCEPT.

Step10:

Mesh/remesh.

Thisstepiswheretheremainingmodelwillbegloballymeshed. Elementsizeandtypecanbesetforallremainingcomponentsthatremainunmeshed.

1.

IntheElementSizefield,enter1.

2.

SetMeshTypetotrias.

3.

ClickMesh.

4.

ClickACCEPT.

Step11:

Cleanupelements.

Atthispointthemodelshouldbeentirelysurfacemeshed. Properadherencetothepreviousstepsensuresasurfacemeshthatisproperlyconnectedandcontrolledbythepreviouslyenteredvalues. Thisstepwillnowallowtheusertoverifyapropermeshandcleanupanyissuesthatarefound.

1.

Inthepanelarea,clickComponents.

2.

Selectallofthecomponentsandclickproceed.

3.

Leaveallofthevaluesattheirdefault（MinSize–0.25,MaxFeatureAngle–60.0,NormalsAngle–150.0）andclickAutoCleanup.

Thefollowingmessageshouldappear.

Thisindicatesthatallfailedelementshavebeenfixedandtherearenofurthererrorsinthemodel.

4.

（Optional）TheManualtaballowstheusertomanuallycheckthemodelforfreeedgesandt-junctionsandfixanythatarefound. Thereisalsotheoptiontodisplaynormals.Usetheseoptionstofindandfix