📄 node11.html
字号:
<!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>2.1 Capabilities</TITLE><LINK REL=STYLESHEET TYPE="text/css" HREF="./Modulef.css" TITLE="Modulef CSS"><meta name="description" value="2.1 Capabilities"><meta name="keywords" value="Guide1"><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=tex2html333 HREF="node10.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/previous_motif.gif" ALT="previous"></A><A NAME=tex2html339 HREF="node10.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/up_motif.gif" ALT="up"></A><A NAME=tex2html341 HREF="node12.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/next_motif.gif" ALT="next"></A><A NAME=tex2html343 HREF="node2.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/contents_motif.gif" ALT="contents"></A><A HREF="../Guide1-18/node11.html"><IMG BORDER=0 SRC="../icons/zoom18.gif" ALIGN=BOTTOM ALT="[BIG]"></A><A HREF="../Guide1-14/node11.html"><IMG BORDER=0 SRC="../icons/zoom14.gif" ALIGN=BOTTOM ALT="[Normal]"></A><A HREF="../Guide1-10/node11.html"><IMG BORDER=0 SRC="../icons/zoom10.gif" ALIGN=BOTTOM ALT="[small]"></A><BR><B> Next: </B> <A NAME=tex2html342 HREF="node12.html">2.2 The MODULEF code</A><B>Up: </B> <A NAME=tex2html340 HREF="node10.html">2 The MODULEF library</A><B> Prev: </B> <A NAME=tex2html334 HREF="node10.html">2 The MODULEF library</A><B><A HREF="node2.html" >Contents</A></B><HR SIZE=3 WIDTH="75%"><H1><A NAME=SECTION03210000000000000000>2.1 Capabilities</A></H1><P><P><P>The following capabilities are available in the MODULEF library:<P><UL><LI> Automatic generation and modification of two- and three-dimensional meshes.<LI> Specification of material characteristics or external forces by sub-domain or boundary section.<LI> Choice of type of finite element method, for example, conforming, non-conforming, hybrid, or mixed. Fornon-conforming methods the flow and stresses can be computed along with the temperature or displacement, or separately.<LI> The finite element library contains about 30 elements for thermal analysis:<P><UL><LI> two- and three-dimensional, and axisymmetric elements,</UL><P>and about 55 elements for elasticity for isotropic and anisotropic materials:<P><UL><LI> two-dimensional plane stress or plane strain elements,<LI> three-dimensional elements,<LI> axisymmetric elements,<LI> plate and shell elements, and<LI> elements for hyper-elastic compressible and incompressible materials in non-linear elasticity.</UL><P>and 3 elements for magnetics.<P><LI> Linear systems can be solved using direct or iterative methods:<P><UL><LI> Direct methods:<P>Cholesky, Crout or Gauss factorization is used depending on the nature of the system matrix.The matrix storing technique is a skyline storage in main or secondary memory.<P><LI> Iterative methods:<P>Symmetric or non-symmetric linear systems are solved iteratively using a choice of conjugate gradient methods with or without preconditioning, or relaxation. Compact storage is used to store thematrices (only non-zero entries are stored).<P></UL><P><LI> Solution methods for eigenproblems include inverse iteration, subspace iteration, Lanczos and QR methods.<LI> The solution of time-dependent thermal problems and dynamic problems by:<UL><LI> classical multi-step,<LI> Gear multi-step predictor-corrector, <LI> 3rd - order semi implicit Runga-Kutta.</UL> The step-size is selected automatically in the last two methods, as well as the order of the scheme for theGear method. <LI> Non-linear elasticity:<UL><LI> the solution of unilateral contact problems without friction by iterative algorithms,<LI> the calculation of stresses in two- or three-dimensional elasto-plasticity and the visualization of plastic zones,<LI> the calculation of large deformations of compressible or incompressible hyper-elastic solids (two- or three-dimensional, or axisymmetric). </UL><LI> Solution of variational inequalities subject to bounded constraints by relaxation and complementarity.<LI> Solution of the Dirichlet problem for a biharmonic operator by a mixed finite elementmethod of order 1 or 2.<LI> Calculation of velocities and pressure of a viscous incompressible fluid (Navier-Stokes equations).<LI> The computation of homogenized coefficients of composite structures.<LI> Decomposition of domains. <LI> Calculation of stresses and interpretation of results, for example:<UL><LI> calculation of error norms,<LI> calculation of the sum of the element residues,<LI> gluing together of two adjacent meshes and their corresponding solutions, etc.</UL><LI> Several modules are available for the display of results, interactively or in batch, for example to plot two- or three-dimensional meshes, deformations, stresses, isovalues, velocities and streamlines in fluid mechanics, etc.<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=tex2html333 HREF="node10.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/previous_motif.gif" ALT="previous"></A><A NAME=tex2html339 HREF="node10.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/up_motif.gif" ALT="up"></A><A NAME=tex2html341 HREF="node12.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/next_motif.gif" ALT="next"></A><A NAME=tex2html343 HREF="node2.html"><IMG BORDER=0 ALIGN=BOTTOM SRC="../icons/contents_motif.gif" ALT="contents"></A><A HREF="../Guide1-18/node11.html"><IMG BORDER=0 SRC="../icons/zoom18.gif" ALIGN=BOTTOM ALT="[BIG]"></A><A HREF="../Guide1-14/node11.html"><IMG BORDER=0 SRC="../icons/zoom14.gif" ALIGN=BOTTOM ALT="[Normal]"></A><A HREF="../Guide1-10/node11.html"><IMG BORDER=0 SRC="../icons/zoom10.gif" ALIGN=BOTTOM ALT="[small]"></A><BR><B> Next: </B> <A NAME=tex2html342 HREF="node12.html">2.2 The MODULEF code</A><B>Up: </B> <A NAME=tex2html340 HREF="node10.html">2 The MODULEF library</A><B> Prev: </B> <A NAME=tex2html334 HREF="node10.html">2 The MODULEF library</A><B><A HREF="node2.html" >Contents</A></B><BR> <HR><P><ADDRESS></ADDRESS></BODY></HTML>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -