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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>1.2 Changing the finite element type</TITLE><LINK REL=STYLESHEET TYPE="text/css" HREF="./Modulef.css" TITLE="Modulef CSS"><meta name="description" value="1.2 Changing the finite element type"><meta name="keywords" value="Guide6"><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=tex2html576 HREF="node7.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/previous_motif.gif" ALT="previous"></A><A NAME=tex2html582 HREF="node6.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/up_motif.gif" ALT="up"></A><A NAME=tex2html584 HREF="node9.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/next_motif.gif" ALT="next"></A><A NAME=tex2html586 HREF="node2.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/contents_motif.gif" ALT="contents"></A><A HREF="../Guide6-18/node8.html"><IMG BORDER=0 SRC="../icons/zoom18.gif" ALIGN=BOTTOM ALT="[BIG]"></A><A HREF="../Guide6-14/node8.html"><IMG BORDER=0 SRC="../icons/zoom14.gif" ALIGN=BOTTOM ALT="[Normal]"></A><A HREF="../Guide6-10/node8.html"><IMG BORDER=0 SRC="../icons/zoom10.gif" ALIGN=BOTTOM ALT="[small]"></A><BR><B> Next: </B> <A NAME=tex2html585 HREF="node9.html">1.3 Changing the mesh structure</A><B>Up: </B> <A NAME=tex2html583 HREF="node6.html">1 Mesh manipulation</A><B> Prev: </B> <A NAME=tex2html577 HREF="node7.html">1.1 Geometric transformations</A><B><A HREF="node2.html" >Contents</A></B><HR SIZE=3 WIDTH="75%"><H1><A NAME=SECTION03220000000000000000>1.2 Changing the finite element type</A></H1><P><P><P>Module NOP2P1 converts a <b> NOPO</b> data structure containing P2 elements into astructure composed of P1 elements only. In practice, the module splitstriangular P2 elements into 4 P1 triangles (the point coordinates on the edges are calculated atthe center of these edges).<P><PRE> SUBROUTINE NOP2P1(M,NFNOP1,NINOP1,NFNOP2,NINOP2)C ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++C AIM : GEOMETRIC TRANSFORMATION OF A P2 D.S. NOPO INTO A P1 D.S. NOPOC +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++</PRE><P>where<UL><LI> M is the super array,<LI> NFNOP1, NINOP1 are the file number and level of the input D.S. <b> NOPO</b>,<LI> NFNOP2, NINOP2 are the file number and level of the output D.S. <b> NOPO</b>. </UL><P>An analogous module, NOQ2Q1 converts Q2 elements with 9 nodes to Q1 elements.<P><PRE> SUBROUTINE NOQ2Q1(M,NFNOP1,NINOP1,NFNOP2,NINOP2)C ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++C AIM : GEOMETRIC TRANSFORMATION OF A Q2 D.S. NOPO INTO A Q1 D.S. NOPOC --- (Q2 WITH 9 NODES ONLY)C +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++</PRE><P>Module NOTRP1 converts a <b> NOPO</b> data structure containing triangular elementswith 7 nodes into a structure composed of P1 elements only. In practice, the modulesplits the initial triangles into 6 P1 triangles.<P><PRE> SUBROUTINE NOTRP1(M,NFNOP1,NINOP1,NFNOP2,NINOP2)C ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++C AIM : GEOMETRIC TRANSFORMATION OF A D.S. NOPO CONTAINING RUASC --- TRIANGLES WITH 7 NODES INTO A P1 D.S. NOPOC +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++</PRE><P>where<P><UL><LI> M is the super array,<LI> NFNOP1, NINOP1 are the file number and level of the input D.S. <b> NOPO</b>,<LI> NFNOP2, NINOP2 are the file number and level of the output D.S. <b> NOPO</b>. </UL><P><P><P><HR SIZE=3 WIDTH="75%"><IMG SRC="../icons/smallmod.gif" WIDTH=211 HEIGHT=50 ALIGN=BOTTOM ALT="Modulef"><A NAME=tex2html576 HREF="node7.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/previous_motif.gif" ALT="previous"></A><A NAME=tex2html582 HREF="node6.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/up_motif.gif" ALT="up"></A><A NAME=tex2html584 HREF="node9.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/next_motif.gif" ALT="next"></A><A NAME=tex2html586 HREF="node2.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/contents_motif.gif" ALT="contents"></A><A HREF="../Guide6-18/node8.html"><IMG BORDER=0 SRC="../icons/zoom18.gif" ALIGN=BOTTOM ALT="[BIG]"></A><A HREF="../Guide6-14/node8.html"><IMG BORDER=0 SRC="../icons/zoom14.gif" ALIGN=BOTTOM ALT="[Normal]"></A><A HREF="../Guide6-10/node8.html"><IMG BORDER=0 SRC="../icons/zoom10.gif" ALIGN=BOTTOM ALT="[small]"></A><BR><B> Next: </B> <A NAME=tex2html585 HREF="node9.html">1.3 Changing the mesh structure</A><B>Up: </B> <A NAME=tex2html583 HREF="node6.html">1 Mesh manipulation</A><B> Prev: </B> <A NAME=tex2html577 HREF="node7.html">1.1 Geometric transformations</A><B><A HREF="node2.html" >Contents</A></B><BR> <HR><P><ADDRESS></ADDRESS></BODY></HTML>⌨️ 快捷键说明
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