Groups
Group selection options
For the commands that let you use groups to select objects, how you select the groups depends on the command.
For some commands, you can select groups directly from the dialog box of the command.
For some commands, you can use smart selection options to select groups from the Simulation Navigator.For information on using the smart selection options to select groups, see Smart selection methods with groups.
For the Show Only post-processing command, you select the group from the Post Processing Navigator.
The following table summarizes the selection methods that are available for commands that support groups in object selection.
| Command | From the dialog box | Using smart selection | From the Post Processing Navigator |
|---|---|---|---|
| Boundary conditions(1) | X | X | |
| Manual meshing(2) | X | ||
| Export Simulation | X | ||
| Show Only (from Home tab) | X | ||
| Identify Results | X | ||
| Show Only (from Results tab) | X | X | |
| Hide (from Results tab) | X | X | |
| Show Only (from Post Processing Navigator) | X | ||
| (1) Examples include the Force, Pressure, and User Defined Constraint commands. (2) Examples include the Node Translate and Element Delete commands. |
Selecting groups for boundary conditions
For boundary condition commands, you can select a single group directly from the dialog box for the command.
In the boundary condition command dialog box, in the Model Objects group, select the Group Reference check box.All of the groups appear in the groups list.
If the model contains a large number of groups, you can optionally use the Filter by Name and Filter by Label options to reduce the number of groups in the Options list.
From the Filter Type list, select the type of FE or geometric entity type to which you want to apply the boundary condition.The options in the Filter Type list depend on the boundary condition.
From the list of groups, select the group that contains the entities to which you want to apply the boundary condition.If the group contains FE or geometric entities that are the same type as the filter type selection, the number of these FE or geometric entities in the group appears in the Select Object option. Any entities in the group that are different from the filter type are ignored.If the group does not contain FE or geometric entities that are the same type as the filter type selection, the Select Object option displays zero and you must select a different group.
Selecting groups for the Export Simulation command
For the Export Simulation command, you can select one or more groups directly from the Export Simulation dialog box.
In the Export Simulation dialog box, on the Export Options tab, in the Subset Export group, click Selected groups.All of the groups appear in the Available groups list.
From the Available groups list, select the group whose FE contents you want to export and click Add.The group appears in the Selected groups list.
To select additional groups, repeat step 2.
When you select groups for the Export Simulation command, the software allows you to select groups that contain geometric entities, even though the exported data is FE entities only. If you select a group that contains geometric entities, the software automatically finds the FE entities related to the geometric entities contained in the group.
Selecting groups for the Identify Results command
For the Identify Results post-processing command, you can select a single group of nodes or elements directly from the Identify dialog box.
In the Identify dialog box, from the Results list, select one of the following:Nodes in Group - Available when the post display is created from nodal results such as displacement.Elements in Group - Available when the post display is created from element-nodal or elemental results such as stress.
From the Group list, select the group for which you want to examine the numerical results.The software automatically filters all of the groups so that only groups whose contents include the correct type of FE entities are listed.
Click Apply Group .The software displays the number of FE entities that are selected and a statistical summary of the results.
Selecting groups for the Show Only and Hide (Result tab) commands
For the Show Only and Hide post-processing commands that you access from the Results tab, you can select one or more groups. When you select multiple groups, you can use the Boolean operations to specify how the software combines them.
In the command dialog box, from the Type list, select whether the command operates on nodes or elements.
From the Method list, select one of the following:Node in Group - Available when you select Node from the Type list.Element in Group - Available when you select Element from the Type list.
From the Boolean list, select an option.
From the Group list, select the group.
Click .The software displays the number of entities in the group that are selected.
To select additional groups, repeat steps 3 through 5.
Selecting groups for the Show Only (Post Processing Navigator) command
For the Show Only post-processing command that you access from the Post Processing Navigator, you can select one or more groups.
In the Post Processing Navigator, expand the Post View node and the Groups folder.The groups that contain FE entities appear in the Groups folder.
In the Groups folder, click the groups that you want to select.To select multiple groups, press and hold Ctrl as you click the node for each group that you want to select.
Right-click the selected groups and choose Show Only.
How do I
Create a group by manually selecting the contents
Create a group automatically from an element quality check
Create groups with the Automatic Group command
Copy a group
Edit a group
Apply a force to the entities in an existing group
Use groups to control model visibility
Learn more
Groups
Automatic group command
Group Elements by Boundary
Creating new groups from existing groups using Boolean operations
Smart selection methods with groups
Controlling the display of nodes in groups
Quick links
Command reference
Pre/Post video examples
Bulk Entry Descriptions
Simcenter 3D tutorials
Browse Simcenter 3D help by product area
Group selection options, Simcenter 3D 2021.1 Series
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Source: https://docs.sw.siemens.com/en-US/doc/289054037/PL20200601120302950.advanced/xid1169183 · retrieved 2026-07-17