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--- doc:user:integration:general:mim_tim [2014/10/07 15:32] – joris
+++ doc:user:integration:general:mim_tim [2024/07/16 10:15] (current) – papeleux
@@ Line 1: / Line 1: @@
-====== Mechanical and thermal iterations manager ======
+====== Managing N.-R. Iterations ======
 Mechanical iterations parameters are imposed by functions associated to ''metafor.getMechanicalIterationManager()'', when thermal iterations parameters are imposed by functions associated to  ''metafor.getThermalIterationManager()''.
@@ Line 17: / Line 17: @@
     mim.setConstrainedDofsVAComputationMethod(VACMeth)
     mim/tim.setPreviousResidualsDecreaseCriterion()
+    mim/tim.setCpuDependency(cpuDep)
+    mim/tim.setForceOneIte(bool)
+where ''meth'' defines the method used to compute the  $Residual$ .
-where ''meth'' defines the method used to calculated the  $Residual$ .
+=== Method1ResidualComputation(limitNormFactor) ===
+<note important>important : since revision 2946 Method1ResidualComputation is **not anymore** the default value</note>
-=== Method1RedisualComputation(limitNormFactor) ===
+The residual is adimensionalized by the norm of external forces and internal reactions .
-The residual is adimensionalized from the norm of external forces and internal reactions (**default value**).
 First :
@@ Line 45: / Line 47: @@
 === Method2ResidualComputation(limitNormFactor) ===
-The residual is adimensionalized from the square of the norm of external forces and internal reactions. First:
+The residual is adimensionalized by the square of the norm of external forces and internal reactions. First:
  $Rmin = \frac{\sqrt{||FreeExternalForces||^2 + ||CstrInternalForces||^2+||CstrInertialForces||^2}}{nreac}$
@@ Line 66: / Line 68: @@
 === Method3ResidualComputation(limitNormFactor) ===
-The residual is adimensionalized from the norm of external and inertial forces, and internal reactions (**value to use preferentially for thermal simulations. Careful, the user must define it**).
+The residual is adimensionalized by the norm of external and inertial forces, and internal reactions (**value to use preferentially for thermal simulations. Careful, the user must define it**).
 If
@@ Line 77: / Line 79: @@
  $Residual = \frac{||FreeResidual||}{ndofs*Rmin}$
-=== Method4ResidualComputation(limitNormFactor) ===
+=== Method4ResidualComputation(limitNormFactor) (**default value**) ===
+<note important>important : since revision 2946 Method4ResidualComputation is the new **default value**</note>
-This method is the same as ''Method1ResidualComputation()'' but without dividing by the number of dofs, so
+This method is the same as ''Method1ResidualComputation()'' but without dividing by the number of dofs nor nreac, so
  $Rmin = ||FreeExternalForces|| + ||CstrInternalForces||+||CstrInertialForces||$
@@ Line 118: / Line 120: @@
 | ''lsp1'' |  1.0  | accuracy that the line-search residual must reach  |
 | ''lsp2'' |  1.E-8  | stop criterion when the line search parameter is not updated enough  |
-| ''predMeth'' |  ''EXTRAPOLATION_DEFAULT''  | ''EXTRAPOLATION_DEFAULT'' = Extrapolation of the scheme by default (for example method to calculate the displacement predictor by Newmark formula in the case of  [[doc:user:integration:scheme:dynimpl#la_famille_alpha-generalisee|alpha-generalized scheme]])  |
+| ''predMeth'' |  ''EXTRAPOLATION_DEFAULT''  | ''EXTRAPOLATION_DEFAULT'' = Extrapolation of the scheme by default (for example method to compute the displacement predictor by Newmark formula in the case of  [[doc:user:integration:scheme:dynimpl#la_famille_alpha-generalisee|alpha-generalized scheme]])  |
-|              |                        | ''EXTRAPOLATION_MRUA'' = method to calculate the displacement predictor by MRUA formula (for now only possible for [[doc:user:integration:scheme:dynimpl#la_famille_alpha-generalisee|alpha-generalized algorithms]]) |
+|              |                        | ''EXTRAPOLATION_MRUA'' = method to compute the displacement predictor by MRUA formula (for now only possible for [[doc:user:integration:scheme:dynimpl#la_famille_alpha-generalisee|alpha-generalized algorithms]]) |
 |              |                        | ''EXTRAPOLATION_ZERO'' = New positions are equal to the old ones, speed (and acceleration for dynamic schemes) equal to zero (for now only possible for  [[doc:user:integration:scheme:quasistatique|quasi-static algorithms]] and [[doc:user:integration:scheme:dynimpl#la_famille_alpha-generalisee|alpha-generalized algorithms]]) . |
 | ''VACMeth'' | ''VAC_SCHEMECONSISTANT'' | ''VAC_SCHEMECONSISTANT'' : Calculation of speed and acceleration with Newmark formula |
-|             | | ''VAC_BACKWARDEULER'' : Calculation of speed and acceleration using Backward Euler (to stabilize Newmark with dofs with a non zero fixed displacement. see JPP's thesis pg VIII.28) |
+|             | | ''VAC_BACKWARDEULER'' : Calculation of speed and acceleration using Backward Euler (to stabilize Newmark with dofs with a non zero fixed displacement. See JPP's thesis pg VIII.28) |
+| ''cpuDep'' | ''False'' | Specify if the criterion for updating the stiffness matrix (irea > 1) depends on the User CPU time. (Metafor Version > 2422). |
+| ''forceOneIte'' | ''False'' | If True, Force the resolution of at least one iteration (mechanical or thermal according to the iteration manager even if the tolerance is allready met at iteration 0. |