Différences

Ci-dessous, les différences entre deux révisions de la page.

--- public:accueil [2023/11/07 11:57] – [Aubes de la NASA] solenekojtych
+++ public:accueil [2023/11/07 12:13] – [NASA blades] solenekojtych
@@ Ligne 793: / Ligne 793: @@
   * Antoine Lémery (summer 2023) <fc #c0c0c0> catalogue creation </fc>
+=== Remarks on the mesh files ===
+<callout type="warning" icon="true">
+The provided mesh files (''.unv'' and ''.med'') contain not only 3D elements (pentahedron) used for finite element computations but also 2D elements (triangles and quadrangles) and 1D elements (beam).
+This is a consequence of the meshing methodology used in Salome: first edges are discretized (1d elements are computed), then faces are generated (2D elements) and finally 3D elements.
+</callout>
+<accordion collapsed="true">
+<panel title="Comments on the .unv format" type="info">
+== General structure ==
+  * the ''unv'' file is split in different //dataset// describing nodes, elements, groups and field
+  * in a data set, each object is described by one or several lines, called //records//. Each line contains one or several //fields//, separated by spaces
+    * some common datasets are: 2411 (nodes), 2412 (elemnts), 2467 (groups)
+    * [[https://www.ceas3.uc.edu/sdrluff/all_files.php|official syntax for the different dataset]] (only currently used dataset are presented on the main page, use the research tool for the others)
+**file example** : [[https://gitlab.lava.polymtl.ca/depots_publics/modeles/catalogue_aubes/-/blob/master/rotor67/initial_blade/mesh/mesh.unv|initial rotor 67 blade]]
+  * <fc #4682b4>**l.13 to 16**</fc> : dataset [[https://www.ceas3.uc.edu/sdrluff/view.php|2420]] => coordinate system definition
+    <code>Global Cartesian Coordinate System
+.0000000000000000E+0    0.0000000000000000E+0    0.0000000000000000E+0   (x axis)
+.0000000000000000E+0    1.0000000000000000E+0    0.0000000000000000E+0   (y axis)
+.0000000000000000E+0    0.0000000000000000E+0    1.0000000000000000E+0   (z axis)
+.0000000000000000E+0    0.0000000000000000E+0    0.0000000000000000E+0   (origin)</code>
+  * <fc #4682b4>**l.20 to 40417**</fc> : dataset [[https://www.ceas3.uc.edu/sdrluff/view.php|2411]] => **node definition**
+    * for instance <fc #4682b4>**l.20 to 21**</fc> :
+  <code>1 (node id)         1 (id of the physical coordinate system)    1 (id of the displacement coordinate system)       11 (color)
+.4451824556310103E-01  -3.8067500825705453E-02   6.7879268792358172E-02 (coordinates)</code>
+  * <fc #4682b4>**l.40421 to 65996**</fc> : dataset [[https://www.ceas3.uc.edu/sdrluff/view.php|2412]] => **elements definition**
+    * beam element (for instance <fc #4682b4>**l.40421 to 40423**</fc>) :
+<code>
+(element id)       22 (element type, here a quadratic beam)        2 (physical property table id)        1 (material property table id)        7 (color)        3 (number of nodes on element)
+         1         1  (beam orientation, beam fore-end cross section id, beam  aft-end cross section id)
+      4681         3  (3 node labels defining element)</code>
+    * non-beam elements, for instance triangle (<fc #4682b4>**l.41105 to 41106**</fc>)
+<code>
+(element id)       42 (element type, here a quadratic triangle)          2 (physical property table id)     1 (material property table id)        7 (color)        6 (number of nodes on element)
+      4797       118      7926       224      7927 (node labels defining element)
+</code>
+  * <fc #4682b4>**l.66000 to 66620**</fc> : dataset 2467 => **definition of groups of nodes or elements**
+== References ==
+  * [[http://victorsndvg.github.io/FEconv/formats/unv.xhtml|high level description of the unv format]]
+  * [[https://www.ceas3.uc.edu/sdrluff/all_files.php|official syntax reference for all datasets]]
+</panel>
+</accordion>
 === Adding a new model to the catalogue ===