Update documentation for 7.2.0

[modules/smesh.git] / doc / salome / gui / SMESH / input / adding_quadratic_elements.doc

diff --git a/doc/salome/gui/SMESH/input/adding_quadratic_elements.doc b/doc/salome/gui/SMESH/input/adding_quadratic_elements.doc
index 50d8eafb1541a8de5fa10886788b744e3c30d696..aaa7978123967b5729a7d9867b5ec293cbadf6f3 100644 (file)
--- a/doc/salome/gui/SMESH/input/adding_quadratic_elements.doc
+++ b/doc/salome/gui/SMESH/input/adding_quadratic_elements.doc
@@ -2,12 +2,29 @@
 
 \page adding_quadratic_elements_page Adding Quadratic Elements
 
 
 \page adding_quadratic_elements_page Adding Quadratic Elements
 

-\n MESH modules allows you to work with <b>Quadratic Elements</b>.
+\n MESH module allows you to work with <b>Quadratic Elements</b>.

 
 

-Quadratic Edge is not a straight but a broken line and can be defined
-by three points: first, middle and last. All more complex \b Quadratic
-\b Elements differ from ordinary ones in that they consist of Quadratic
-Edges.
+Quadratic elements are defined by the same corner nodes as the
+corresponding linear ones, but in addition they have \a midside nodes
+located between the corner nodes on element sides.
+
+If a quadratic quadrilateral element has an additional node at the
+element center, it is a bi-quadratic element (or
+QUAD9). If a quadratic hexahedral element has 7 additional nodes:
+at the element center and at the center of each side it is a
+tri-quadratic element (or HEXA27).
+
+SALOME uses the convention of nodal connectivity of MED library elements. You
+can consult the description of nodal connectivity of elements in the documentation on MED library or 
+<a href="http://www.code-aster.org/outils/med/html/connectivites.html">
+  here </a>.
+
+There are several ways to create quadratic elements in your mesh:
+- manually (this way is described below);
+- use \ref quadratic_mesh_anchor "Quadratic Mesh" hypothesis to
+generate a quadratic mesh on your geometry;
+- convert an existing linear mesh to a quadratic one 
+(see \ref convert_to_from_quadratic_mesh_page).

 
 <em>To add a quadratic element to your mesh:</em>
 <ol>
 
 <em>To add a quadratic element to your mesh:</em>
 <ol>


@@ -16,7 +33,26 @@ Edges.
 <li>From the \b Modification menu choose the \b Add item and select
 one of the following:
 
 <li>From the \b Modification menu choose the \b Add item and select
 one of the following:
 

-\image html image152.gif
+\image html image152.png
+
+\note All dialogs for quadratic element adding to the mesh
+provide the possibility to automatically add an element
+to the specified group or to create the group anew using
+<b>Add to group</b> box, that allows choosing an existing group for
+the created node or element or giving the name to a new group. By
+default, the <b>Add to group</b> check box is switched off. If the user
+swiches 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
+<b>Apply</b> or <b>Apply & Close</b> button, the warning message box
+informs the user about the necessity to input a new group name. The
+combo box lists both \ref standalone_group "standalone groups"
+and \ref group_on_geom "groups on geometry". If the user chooses a
+group on geometry, he is warned and proposed to
+\ref convert_to_standalone "convert this group to standalone".
+If the user rejects conversion operation, it is cancelled and
+a new quadratic element is not created.
+

 
 To create any <b>Quadratic Element</b> specify the nodes which will form your
 triangle by selecting them in the 3D viewer with pressed Shift
 
 To create any <b>Quadratic Element</b> specify the nodes which will form your
 triangle by selecting them in the 3D viewer with pressed Shift


@@ -26,7 +62,7 @@ selection).The edges formed by the corner nodes will appear in the
 table. To define the middle nodes for each edge double-click on the
 respective field and input the number of the node. All edges and the
 object formed by them will be displayed in the Object browser. When
 table. To define the middle nodes for each edge double-click on the
 respective field and input the number of the node. All edges and the
 object formed by them will be displayed in the Object browser. When

-all edges are defined you will be able to click \b OK or \b Apply button to
+all edges are defined you will be able to click \b Apply or <b>Apply and Close</b> button to

 add the element to the mesh.
 
 \image html aqt.png
 add the element to the mesh.
 
 \image html aqt.png