Adding nodes and elements

In MESH you can add to your mesh different elements such as:

The convention of nodal connectivity of elements used in SALOME is the MED library convention. You can consult the description of nodal connectivity of elements in the documentation on MED library or Nodal connectivity of elements.

To add a node or an element to your mesh:

  1. Select your mesh in the Object Browser or in the 3D viewer.

  2. From the Modification menu choose the Add item, the following associated sub-menu will appear:

    _images/image152.png

    From this sub-menu select the type of element which you would like to add to your mesh.

    Note

    All dialogs for new node or element adding to the mesh provide the possibility to automatically add a node or element to the specified group or to create it anew using Add to group box, that allows choosing an existing group for the created node or element or giving the name to a new group. By default, the Add to group check box is switched off. If the user switches this check box on, the combo box listing all currently existing groups of the corresponding type becomes available. By default, no group is selected. In this case, when the user presses Apply or Apply & Close button, the warning message box informs the user about the necessity to input new group name. The combo box lists groups of all the Grouping elements: both “Standalone Group”, “Group on Filter”, and “Group on Geometry”. If the user chooses a group on geometry or on filter, he is warned and proposed to convert this group to standalone.

    If the user rejects conversion operation, it is cancelled and a new node/element is not created!

See Also sample TUI Scripts of Adding Nodes and Elements operations.

Adding nodes

_images/addnode.png

In this dialog box set coordinates for your node in the Coordinates set of fields and click the Apply or Apply and Close button. Your node will be created:

_images/add_node.png

Adding 0D elements

_images/add0delement.png

In this dialog box specify nodes which will form your 0D elements by selecting them in the 3D viewer. Activate Allow duplicate elements to get several 0D elements on a node. Click the Apply or Apply and Close button. Your 0D elements will be created:

_images/add_0delement.png

Making 0D elements on Element Nodes

There is another way to create 0D elements. It is possible to create 0D elements on all nodes of the selected mesh, sub-mesh, or a group of elements or nodes.

_images/dlg_0D_on_all_nodes.png

In this dialog

  • The radio-buttons allow choosing the type of object to create 0D elements on.

    • Mesh, sub-mesh, group - this button allows selecting a mesh, a sub-mesh or a group to create 0D elements on the nodes of its elements. The name of the selected object is shown in the dialog.
    • Elements - this button allows selecting elements in the VTK viewer or typing their IDs in the dialog.
    • Nodes - this button allows selecting nodes to create 0D elements on in the VTK viewer or typing their IDs in the dialog.
  • Set Filter button allows selecting elements or nodes by filtering mesh elements or nodes with different criteria (see Filter Dialog).

  • Activate Allow duplicate elements to get several 0D elements on a node.

  • Switching on Add to group check-box allows specifying the name of the group to which all created or found (existing) 0D elements will be added. You can either select an existing group from a drop-down list, or enter the name of the group to be created. If a selected existing Grouping elements is not Standalone (Group On Geometry or Group On Filter) it will be converted to Standalone.

Warning

If Add to group is activated it has to be filled in.

Adding ball elements

_images/addball.png

In this dialog box specify the nodes, which will form your ball elements, either by selecting them in the 3D viewer or by manually entering their IDs, specify the ball diameter and click the Apply or Apply and Close button.

_images/add_ball.png

Adding edges

_images/addedge.png

In this dialog box specify the nodes which will form your edge by selecting them in the 3D viewer with pressed Shift button and click the Apply or Apply and Close button. Your edge will be created:

_images/add_edge.png

Adding triangles

_images/addtriangle.png

In this dialog box specify the nodes which will form your triangle by selecting them in the 3D viewer with pressed Shift button and click the Apply or Apply and Close button. Your triangle will be created:

_images/add_triangle.png

Adding quadrangles

_images/addquadrangle.png

In this dialog box specify the nodes which will form your quadrangle by selecting them in the 3D viewer with pressed Shift button and click the Apply or Apply and Close button. Your quadrangle will be created:

_images/add_quadrangle.png

Adding polygons

_images/addpolygon.png

In this dialog box specify the nodes which will form your polygon by selecting them in the 3D viewer with pressed Shift button and click the Apply or Apply and Close button.

_images/add_polygone.png

Adding tetrahedrons

_images/addtetrahedron.png

In this dialog box specify the nodes which will form your tetrahedron by selecting them in the 3D viewer with pressed Shift button and click the Apply or Apply and Close button. Your tetrahedron will be created:

_images/image70.jpg

Adding hexahedrons

_images/addhexahedron.png

In this dialog box specify the nodes which will form your hexahedron by selecting them in the 3D viewer with pressed Shift button and click the Apply or Apply and Close button. Your hexahedron will be created:

_images/image71.jpg

Adding hexagonal prism

In the Add Hexagonal Prism dialog box specify the nodes which will form your hexagonal prism by selecting them in the 3D viewer with pressed Shift button and click the Apply or Apply and Close button. Your hexagonal prism will be created:

_images/image_octa12.png

Adding polyhedrons

_images/a-createpolyhedralvolume.png

There are two different ways to add polyhedral volumes.

If you select Node as Elements Type you will specify the nodes which will form the faces of your polyhedron by selecting the nodes in the 3D viewer with pressed Shift button and clicking the Add button to add the face in the list of Faces by Nodes, which will form your polyhedron. Note, that it could be very useful to toggle Polyhedron Preview checkbox to see the results of your selection. The second way is somewhat simpler, however, there are cases when it does not provide you with the necessary level of precision. If you select Face as Elements Type, you will be able to select the faces which will form your polyhedron in the 3D viewer with pressed Shift button. If you’ve managed to obtain the necessary result, click the Apply or Apply and Close button. Your polyhedron will be created:

_images/add_polyhedron.png