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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 3.2 Final//FR"><!-- Converted with LaTeX2HTML 95.1 (Fri Jan 20 1995) --><!-- by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds --><!-- Modified Simulog 03/97 --><HTML><HEAD><TITLE>2.3.1 The NOPO data structure</TITLE><LINK REL=STYLESHEET TYPE="text/css" HREF="./Modulef.css" TITLE="Modulef CSS"><meta name="description" value="2.3.1 The NOPO data structure"><meta name="keywords" value="Guide3"><meta name="resource-type" value="document"><meta name="distribution" value="global"></HEAD><BODY BGCOLOR="#FFFFFF"><P> <IMG SRC="../icons/smallmod.gif" WIDTH=211 HEIGHT=50 ALIGN=BOTTOM ALT="Modulef"><A NAME=tex2html1257 HREF="node32.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/previous_motif.gif" ALT="previous"></A><A NAME=tex2html1263 HREF="node32.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/up_motif.gif" ALT="up"></A><A NAME=tex2html1265 HREF="node34.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/next_motif.gif" ALT="next"></A><A NAME=tex2html1267 HREF="node2.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/contents_motif.gif" ALT="contents"></A><A NAME=tex2html1268 HREF="node28.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/index_motif.gif" ALT="index"></A><A HREF="../Guide3-18/node33.html"><IMG BORDER=0 SRC="../icons/zoom18.gif" ALIGN=BOTTOM ALT="[BIG]"></A><A HREF="../Guide3-14/node33.html"><IMG BORDER=0 SRC="../icons/zoom14.gif" ALIGN=BOTTOM ALT="[Normal]"></A><A HREF="../Guide3-10/node33.html"><IMG BORDER=0 SRC="../icons/zoom10.gif" ALIGN=BOTTOM ALT="[small]"></A><BR><B> Next: </B> <A NAME=tex2html1266 HREF="node34.html">2.3.2 Modification of the numbers</A><B>Up: </B> <A NAME=tex2html1264 HREF="node32.html">2.3 Main ideas</A><B> Prev: </B> <A NAME=tex2html1258 HREF="node32.html">2.3 Main ideas</A><B><A HREF="node28.html" >Index</A></B><B><A HREF="node2.html" >Contents</A></B><HR SIZE=3 WIDTH="75%"><H2><A NAME=SECTION00531000000000000000>2.3.1 The NOPO data structure</A></H2><P>This structure contains the following information (see chapter <A HREF="node4.html#chap1">1</A>):<P><UL><LI> the <i> nature</i> of the element;<LI> the list of the <i> vertices</i> of the element; <LI> the element <i> connectivity</i> and <i> topology</i>;<LI> the <i> number</i> and list of the nodes; <LI> the <i> coordinates</i> of the vertices;<LI> the <i> physical attributes</i> of the element:<UL><LI> a <i> sub-domain number</i> number and <i> references</i>. </UL></UL><P>The MODULEF code stores this information in a <b> NOPO</b> type data structure, constituting the natural interfacebetween the different mesh modules.<P><P><P><b> Remark:</b><P><UL><LI> The sub-domains<A NAME=3873> </A>: The notion of materials is refined to distinguish between two identical media subject to different conditions: as many sub-domain numbers are assigned as required to make this distinction;<LI> The references<A NAME=3874> </A>: This attribute has two functions:<UL><LI> to characterize the items (edges, faces and points) with respect to a boundary condition type treatment (loads, prescribed values, etc.) <LI> to describe a boundary from a geometric point of view: i.e. to associate a curve or surface equation to a portion of the boundary.</UL><P>As many reference numbers are assigned as required in order to incorporate the entire set of descriptions.<P></UL><P><P><P><HR SIZE=3 WIDTH="75%"><IMG SRC="../icons/smallmod.gif" WIDTH=211 HEIGHT=50 ALIGN=BOTTOM ALT="Modulef"><A NAME=tex2html1257 HREF="node32.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/previous_motif.gif" ALT="previous"></A><A NAME=tex2html1263 HREF="node32.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/up_motif.gif" ALT="up"></A><A NAME=tex2html1265 HREF="node34.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/next_motif.gif" ALT="next"></A><A NAME=tex2html1267 HREF="node2.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/contents_motif.gif" ALT="contents"></A><A NAME=tex2html1268 HREF="node28.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/index_motif.gif" ALT="index"></A><A HREF="../Guide3-18/node33.html"><IMG BORDER=0 SRC="../icons/zoom18.gif" ALIGN=BOTTOM ALT="[BIG]"></A><A HREF="../Guide3-14/node33.html"><IMG BORDER=0 SRC="../icons/zoom14.gif" ALIGN=BOTTOM ALT="[Normal]"></A><A HREF="../Guide3-10/node33.html"><IMG BORDER=0 SRC="../icons/zoom10.gif" ALIGN=BOTTOM ALT="[small]"></A><BR><B> Next: </B> <A NAME=tex2html1266 HREF="node34.html">2.3.2 Modification of the numbers</A><B>Up: </B> <A NAME=tex2html1264 HREF="node32.html">2.3 Main ideas</A><B> Prev: </B> <A NAME=tex2html1258 HREF="node32.html">2.3 Main ideas</A><B><A HREF="node28.html" >Index</A></B><B><A HREF="node2.html" >Contents</A></B><BR> <HR><P><ADDRESS></ADDRESS></BODY></HTML>⌨️ 快捷键说明
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