Difference between revisions of "XML Input Files for NairnFEA"

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All <tt>XML</tt> input command files for FEA calculations must begin with an <code>XML</code> declaration, an optional document type declaration, and the main input file tag and end with the corresponding closing tags. For FEA calculations, the global file structure is:
Input <tt>XML</tt> files for [[NairnFEA]] must conform to the definition on this page.
__TOC__
== FEA Input XML File Definition ==


<table rowspacing="0">
All <tt>XML</tt> input command files for FEA calculationsin [[NairnFEA]] must conform to the following document definition including order of all <tt>XML</tt> elements. This template lists only the top-level main element and their next-level subordinate elements. For the subordinate elements, those separated by a vertical bar (|) mean any one of those elements in any order while those separated by commas mean in exactly that order. A more formal definition for FEA input <tt>XMlL</tt> files is given in the <tt>DTD</tt> file provided in the source code files at <tt>NairnFEA/input/NairnFEA.dtd</tt>.
 
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<pre style="border-style:none;margin:0px;padding:0px 10px;">
&lt;?xml version='1.0'?&gt;
&lt;?xml version='1.0'?&gt;
&lt;!DOCTYPE JANFEAInput SYSTEM &quot;NairnFEA.dtd&quot;
&lt;!DOCTYPE JANFEAInput SYSTEM &quot;NairnFEA.dtd&quot;
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]&gt;
]&gt;
</pre></td>
</pre></td>
<td>XML file start with optional entity</td>
<td style="padding-left:10px;">XML declaration[[#Notes|<sup>1,2</sup>]]</td>
</tr>
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<t>
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<td><pre style="border-style:none;">
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&lt;JANFEAInput version='3'&gt;
&lt;JANFEAInput version='3'&gt;
</pre></td>
</pre></td>
<td>This element encloses all input commands</td>
<td style="padding-left:10px;">Top level element[[#Notes|<sup>3</sup>]]</td>
</tr>
</tr>


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&lt;?xml version='1.0'?&gt;
&lt;!DOCTYPE JANFEAInput SYSTEM &quot;NairnFEA.dtd&quot;
[
  &lt;!ENTITY force &quot;100&quot;&gt;
]&gt;
&lt;JANFEAInput version='3'&gt;
 
   <Header>
   <Header>
     ( Analysis | Description | Output | Select | DevelFlag )
     ( Analysis | Description | Output
              | Select | DevelFlag )
   </Header>
   </Header>


</pre></td>
<td style="padding-left:10px;">One <tt>Analysis</tt> is required.</td>
</tr>
<tr>
<td style="border-left:thin dashed blue;border-right:thin dashed blue;">
<pre style="border-style:none;margin:0px;padding:0px 10px;">
   <Mesh>
   <Mesh>
     ( Keypoints, Path+, Area+ )
     ( Keypoints, Path, Area )
  (XML Commands to define the calculation)
        or
  ...
    ( NodeList, ElementList)
  </Mesh>
 
</pre></td>
<td style="padding-left:10px;">The mesh can be generated (with keypoints, paths and areas) or explicit, but not both</td>
</tr>
 
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<td style="border-left:thin dashed blue;border-right:thin dashed blue;">
<pre style="border-style:none;margin:0px;padding:0px 10px;">
  <BMP>…</BMP>
  <Region>…</Region>
  <Hole>…</Hole>
</pre></td>
<td style="padding-left:10px;">These blocks used when [[Create a Mesh with Images and Shapes|creating a mesh with images and shapes]]</td>
</tr>
 
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<pre style="border-style:none;margin:0px;padding:0px 10px;">
  <Material>
    ( property commands )
  </Material >
 
</pre></td>
<td style="padding-left:10px;">Define each material in a separate <tt>Material</tt> block</td>
</tr>
 
<tr>
<td style="border-left:thin dashed blue;border-right:thin dashed blue;">
<pre style="border-style:none;margin:0px;padding:0px 10px;">
  <GridBCs>
    ( Cracktip )
    ( DisplacementBCs | LoadBCs | EdgeBCs
                      | BCLine | BCPt | Periodic )
    ( Resequence )
  </GridBCs>
 
</pre></td>
<td style="padding-left:10px;">Define all boundary conditions[[#Notes|<sup>4</sup>]]</td>
</tr>
 
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<td style="border-left:thin dashed blue;border-right:thin dashed blue;">
<pre style="border-style:none;margin:0px;padding:0px 10px;">
  <Thermal>
    ( Temperature, StressFreeTemp)
  </Thermal>
 
</pre></td>
<td style="padding-left:10px;">Optional</td>
</tr>
 
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<pre style="border-style:none;margin:0px;padding:0px 10px;">
&lt;/JANFEAInput&gt;
&lt;/JANFEAInput&gt;
</pre>
</pre></td>
<td style="padding-left:10px;">&nbsp;</td>
</tr>
 
</table>


The <tt>!DOCTYPE</tt> element defines the file type and has the <tt>SYSTEM</tt> option to provide a path to a Document Type Definition (or <tt>DTD</tt>) file. The path is needed when you [[Options for Running Calculations|run the code]] with the validation option (<tt>-v</tt>), which is highly recommended. The required <tt>DTD</tt> file for FEA calculations is provided in the <tt>/input</tt> folder of the source code files.
== Sample Input XML File ==


The <tt>!DOCTYPE</tt> element can define any number of entities. These entities can be used elsewhere in the text of the <tt>XML</tt> file and they will be replaced by the text in the entity definition. Entities can define values that make it easier to read input <tt>XML</tt> files and easier to modify them for new calculations.
Click this link to see a [[Sample FEA Input Command File#XML FEA Input Command File|sample XML FEA input command file]] for analysis of an end-loaded cantilever beam.


The remainder of the file is included within a <tt>JANFEAInput</tt> block. The <tt>version</tt> attribute is currently not needed, but may be important in the future. To be consistent with the document definition in the <tt>DTD</tt> file, all elements with the <tt>JANFEAInput</tt> block must be entered in the ordered defined in the [[#toc|table of contents]] on this page. Elements that are not used can be omitted, but all needed elements must be in that specific order.
== Notes ==


Click this link to see a [[Sample FEA Input Command File|sample XML FEA input command file]] for analysis of an end-loaded cantilever beam.
# The <tt>!DOCTYPE</tt> element defines the file type and has the <tt>SYSTEM</tt> option to provide a path to a Document Type Definition (or <tt>DTD</tt>) file. The path is needed when you [[Options for Running Calculations|run the code]] with the validation option (<tt>-v</tt>), which is highly recommended. The required <tt>DTD</tt> file for FEA calculations is provided in the <tt>/input</tt> folder of the source code files.
# The <tt>!DOCTYPE</tt> element can define any number of entities. These entities can be used elsewhere in the text of the <tt>XML</tt> file and they will be replaced by the text in the entity definition. Entities can define values that make it easier to read input <tt>XML</tt> files and easier to modify them for new calculations.
# All input commands are in the top-level <JANFEAInput> element. The <tt>version</tt> attribute is option, but might be used in the future.
# if the optional <tt>CrackTip</tt> and <tt>Resequence</tt> commands are used, they must be first and last, respectively, in the <tt>GridBCs</tt> element. The rest of the subordinate commands can be in any order.

Latest revision as of 23:06, 14 January 2014

Input XML files for NairnFEA must conform to the definition on this page.

FEA Input XML File Definition

All XML input command files for FEA calculationsin NairnFEA must conform to the following document definition including order of all XML elements. This template lists only the top-level main element and their next-level subordinate elements. For the subordinate elements, those separated by a vertical bar (|) mean any one of those elements in any order while those separated by commas mean in exactly that order. A more formal definition for FEA input XMlL files is given in the DTD file provided in the source code files at NairnFEA/input/NairnFEA.dtd. 

<?xml version='1.0'?>
<!DOCTYPE JANFEAInput SYSTEM "NairnFEA.dtd"
[
  <!ENTITY force "100">
]>
XML declaration1,2 
<JANFEAInput version='3'>
Top level element3 
  <Header>
    ( Analysis | Description | Output
               | Select | DevelFlag )
  </Header>
One Analysis is required. 
  <Mesh>
    ( Keypoints, Path, Area )
        or
    ( NodeList, ElementList)
  </Mesh>
The mesh can be generated (with keypoints, paths and areas) or explicit, but not both 
  <BMP>…</BMP>
  <Region>…</Region>
  <Hole>…</Hole>
These blocks used when creating a mesh with images and shapes 
  <Material>
    ( property commands )
  </Material >
Define each material in a separate Material block 
  <GridBCs>
    ( Cracktip )
    ( DisplacementBCs | LoadBCs | EdgeBCs 
                      | BCLine | BCPt | Periodic )
    ( Resequence )
  </GridBCs>
Define all boundary conditions4 
  <Thermal>
    ( Temperature, StressFreeTemp)
  </Thermal>
Optional 
</JANFEAInput>
 

Sample Input XML File

Click this link to see a sample XML FEA input command file for analysis of an end-loaded cantilever beam.

Notes

  1. The !DOCTYPE element defines the file type and has the SYSTEM option to provide a path to a Document Type Definition (or DTD) file. The path is needed when you run the code with the validation option (-v), which is highly recommended. The required DTD file for FEA calculations is provided in the /input folder of the source code files.
  2. The !DOCTYPE element can define any number of entities. These entities can be used elsewhere in the text of the XML file and they will be replaced by the text in the entity definition. Entities can define values that make it easier to read input XML files and easier to modify them for new calculations.
  3. All input commands are in the top-level <JANFEAInput> element. The version attribute is option, but might be used in the future.
  4. if the optional CrackTip and Resequence commands are used, they must be first and last, respectively, in the GridBCs element. The rest of the subordinate commands can be in any order.
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