Linear Algorithm: Difference between revisions

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| style="background:green; color:black; width:800px" | '''algorithm Linear <-initial> <-factorOnce>'''
| style="background:lightgreen; color:black; width:800px" | '''algorithm Linear <-initial> <-factorOnce>'''
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Revision as of 18:23, 17 May 2013




This command is used to construct a Linear algorithm object which takes one iteration to solve the system of equations.

<math> \Delta U = - K^{-1}R(U),\!</math>


algorithm Linear <-initial> <-factorOnce>


-secant optional flag to indicate to use secant stiffness
-initial optional flag to indicate to use initial stiffness
-factorOnce optional flag to indicate to only set up and factor matrix once

NOTES 1) as the tangent matrix typically will not change during the analysis in case of an elastic system it is highly advatageous to use the -factorOnce option. Do not use this option if you have a nonlinear system and you want the tangent used to be actual tangent at time of the analysis step.


Code Developed by: fmk