How do I select only outer faces?

jwkim
jwkim Member Posts: 7
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in Structures

Hi, Team

I'm writing code for automation in Ansys Mechanical and I need to select only the outer faces, but I am not sure how to approach it.

I would appreciate if you could give me some ideas or point me to some code that allows me to make a named selection of the outer faces.

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  • Mike.Thompson
    Mike.Thompson Member, Employee Posts: 345
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    edited February 28

    See this example. It uses code from the Bolt Tools Add On to make this easier. This code is also in the project file as a suppressed python code object in the tree. There are two examples: fully enclosed block and a block that is open on one end.

    #import from the bolt tools add on
import sys
BoltToolsDir = ExtAPI.ExtensionManager.GetExtensionByName("BoltTools").InstallDir
if not BoltToolsDir in sys.path:
    sys.path.append(BoltToolsDir)
import GeoConnectivityHelper
GeoConnectivityHelper.Initialize(ExtAPI, Ansys)

#Use the bolt tools add on module to get the face connectivity from a starting face
StartFacesNs = ExtAPI.DataModel.GetObjectsByName("StartFaces")[0]
StopFacesNs = ExtAPI.DataModel.GetObjectsByName("StopFaces")[0]

ConnectivityMap = GeoConnectivityHelper.FaceConnectivityMap()
ConnectivityMap.BoundaryDefinition="Explicit"
ConnectivityMap.StartFaces=StartFacesNs.Entities
ConnectivityMap.StopFaces=StopFacesNs.Entities
Zones = ConnectivityMap.GetZones()

i=1
for Zone in Zones:
    #Create a new NS to represent the output
    NewNs = Model.AddNamedSelection()
    SelInfo = ExtAPI.SelectionManager.CreateSelectionInfo(SelectionTypeEnum.GeometryEntities)
    SelInfo.Entities = Zone.Faces
    NewNs.Location = SelInfo
    NewNs.Name = "Zone Faces: "+str(i)
    i+=1

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