How do I select only outer faces?

jwkim

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.

Mike.Thompson

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