犀牛软件与icem的转换.docx

犀牛软件与icem的转换.docx

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犀牛软件与icem的转换

HowToRhino&ICEM

Simple2Dmodel

1）Newfilesetup:

chooseMillimeter（automaticallyconvertstoMetersifimportedtoICEM）

2）Setunits:

FilePropertiesUnits:

Modelunits:

shouldalreadybeMillimeters

Abs.tolerance=sizeofsmallestfeature（treatedasMetersbyCSMP）=i.e.0.01

Rel.tolerance=ratiobetweensmallestandlargestobject（in%）=i.e.1.0

Angletolerance=similartoabs.tolerance,butforangles=i.e.0.01（SKM:

0.1）

Question:

doesithavetobeMillimeters?

No,becauseCSMPtreatsitasMetersanyway!

3）Drawaroundorigin（bestcentered!

）,otherwisesignificantdigitscanbelost

（Y=up,X=left-rightdrawin“TOP”viewfor2D）

Doesn’tmatterifboxorlinedrawing（mustbeNURBScurvescheckinObjectProperties!

）

Usesnappingtoexactlycloselinesatintersections:

4）Assignobjectstocertainlayers（toe.g.separatefracturesfrombedding）:

selectseveralobjectswithSHIFTright-clickonlayer“SelectObjectLayer”

5）Splitacurve:

selectthecurvecommand“Split”orselectcuttingobjects（dothiswithallintersections!

）,usecutcurvestocuttheotherones（“cuttingtheotherway

round”）

Explodeclosedcurveswith

（ToolinICEM:

“Topology”splitsautomatically,butmightdestroythingsonestillneeds!

）

6）ICEMneedstoknowwherethebeginningandendofobjectsare（putsnodethere）:

createstartandendpointsforallcurves:

selectallcurvesCurvePointObjectMarkCurveStart&End,createpointsatintersections:

CurveCurveFromObjectsIntersection（orcommand“Intersection”）

Question:

aremultiplepointsaproblem?

Towhatlayerdotheyhavetobelongto?

（Toremoveduplicates:

EditSelectObjectsDuplicateObjectsDELETE）

7）Renamelayers:

LEFT,RIGHT,TOP,BOTTOM（doesn’thavetobeuppercase,ICEMautomaticallyconvertsintouppercase）putboundarylinesintospecificlayers

（IRREGULARnotpossiblein2D!

!

!

）

8）Createonesurfacethatcoversallobjects:

SelectallSurfacePlanarCurve

9）Splitthesurface:

selectthesurfacecommand“Split”orselectthecurvesthatshouldcutit

Movenewsurfacestoseparate（new）layers

（Splittingofsurfacesbyfracturesthatdonotcutallthroughisnotpossible）

Question:

doweneedtodrawoutliningcurvestothesurfaces?

（Toshowsurfacesinlayercolors:

Right-clickonViewcorner“TOP”Shaded）

10）SaveasRhinoversion3（.3dm）–watchout:

alllayersofobjectsthatshouldbeexported,shouldbevisible（lightbulbon）!

11）Drag&dropthefileonto3dm2tin.exe（ANSYS12makesitautomaticallyitself!

）

ICEM

（screenshotsfromANSYS12）

1）OpenthegeometryinICEMCFD:

ANSYS11:

FileGeometryOpenGeometry（choose.tin）

ANSYS12（?

）:

FileImportGeometryRhino3DM（choose.3dm;ICEMautomaticallycreatesa.tin）checkUseObjectNamesforPartsandIncludeHiddenLayersclickApply

Question:

FilefromRhinov3orv4?

（leftwindow:

“Parts”containobjectsfromtheRhinolayers,withaccordinglabels）

2）Changetheappearanceofobjects,ifnecessary:

Right-clickon“Geometry”objects

3）Ifaline/surface/...ismissing（e.g.bottomline）,drawyourownline/surface/...:

Right-clickon“Parts”CreatePartcallitBOTTOM

SelectthetwocornerpointsdrawalinewithoneoftheCurvetools:

（#2）

（sometimesdoactionsseveraltimes（becauseofbugs）!

!

!

）

4）Movingobjectsintoanotherlayer/”part”:

Right-clickonpartAddtoPartclickonarrownexttotheEntityfield（insectionAddtoPartbySelection）

selectlinetypeforentityselectthelinewithleft-clickacceptwithmiddle-click（orundowithright-click）

GlobalMeshSetup（changedefaultvalues,ifnecessary）:

（#1）

1.Global:

Maxelement:

ifsmall,meshwillbefine–iflarge,meshwillbecoarse（=max.sizeameshelementwillhave）

2.Surface:

Meshtype=e.g.AllTri（dependingonwhatkindofmeshelementsiswanted）,MeshMethod=PatchIndependent（=mostrobust）

3.Volume（onlyfor3D）:

Meshtype=Tetra/Mixed,MeshMethod=Robust（Octree）

4.Growprismlayers（onlyfor3D,orifuniformmeshneeded）

（check“Display”toshowe.g.resultingmin/maxelementsizes）

5）Meshsizesforparts:

（#2）table

Checkfracturesas“IntWall”,becausetheyareobjectswithonedimensionless,thatneedtohaveotherpropertiesassigned

6）SurfaceandCurveMeshSetup:

（#3and4）

Forsurfaces:

Selectasurfaceacceptwithmiddle-clickMaximumsize=e.g.0.4（=max.elementsizeinmeters）clickApply

（Similarrulesapplyforcurves）

Torefinecertainpartsofthemesh,createa“Density”:

（#5）

Eitherdrawwithpointsordoitviaentityboundaries

7）ComputeMesh:

（#8）

PossibletooverwriteglobalsettingsclickCompute

（for3D:

optiontorunitwithbatchprocessinGlobalVolumeMeshingParameters;step5）

8）Visualizeassolid,turnoffallgeometriesdetecte