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non_linear_solver_lumped.cc
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rAKA akantu
non_linear_solver_lumped.cc
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/**
* @file non_linear_solver_lumped.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date Tue Aug 25 00:57:00 2015
*
* @brief Implementation of the default NonLinearSolver
*
* @section LICENSE
*
* Copyright (©) 2010-2011 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "non_linear_solver_lumped.hh"
#include "dof_manager_default.hh"
#include "solver_callback.hh"
#include "communicator.hh"
/* -------------------------------------------------------------------------- */
namespace
akantu
{
/* -------------------------------------------------------------------------- */
NonLinearSolverLumped
::
NonLinearSolverLumped
(
DOFManagerDefault
&
dof_manager
,
const
NonLinearSolverType
&
non_linear_solver_type
,
const
ID
&
id
,
UInt
memory_id
)
:
NonLinearSolver
(
dof_manager
,
non_linear_solver_type
,
id
,
memory_id
),
dof_manager
(
dof_manager
)
{
this
->
supported_type
.
insert
(
_nls_lumped
);
this
->
checkIfTypeIsSupported
();
this
->
registerParam
(
"b_a2x"
,
this
->
alpha
,
1.
,
_pat_parsmod
,
"Conversion coefficient between x and A^{-1} b"
);
}
/* -------------------------------------------------------------------------- */
NonLinearSolverLumped
::~
NonLinearSolverLumped
()
=
default
;
/* ------------------------------------------------------------------------ */
void
NonLinearSolverLumped
::
solve
(
SolverCallback
&
solver_callback
)
{
this
->
dof_manager
.
updateGlobalBlockedDofs
();
solver_callback
.
predictor
();
auto
&
x
=
this
->
dof_manager
.
getGlobalSolution
();
const
auto
&
b
=
this
->
dof_manager
.
getResidual
();
x
.
resize
(
b
.
size
());
this
->
dof_manager
.
updateGlobalBlockedDofs
();
const
Array
<
bool
>
&
blocked_dofs
=
this
->
dof_manager
.
getGlobalBlockedDOFs
();
solver_callback
.
assembleResidual
();
const
auto
&
A
=
this
->
dof_manager
.
getLumpedMatrix
(
"M"
);
// alpha is the conversion factor from from force/mass to acceleration needed
// in model coupled with atomistic \todo find a way to define alpha per dof
// type
this
->
solveLumped
(
A
,
x
,
b
,
blocked_dofs
,
alpha
);
this
->
dof_manager
.
splitSolutionPerDOFs
();
solver_callback
.
corrector
();
}
/* -------------------------------------------------------------------------- */
void
NonLinearSolverLumped
::
solveLumped
(
const
Array
<
Real
>
&
A
,
Array
<
Real
>
&
x
,
const
Array
<
Real
>
&
b
,
const
Array
<
bool
>
&
blocked_dofs
,
Real
alpha
)
{
auto
A_it
=
A
.
begin
();
auto
x_it
=
x
.
begin
();
auto
x_end
=
x
.
end
();
auto
b_it
=
b
.
begin
();
auto
blocked_it
=
blocked_dofs
.
begin
();
for
(;
x_it
!=
x_end
;
++
x_it
,
++
b_it
,
++
A_it
,
++
blocked_it
)
{
if
(
!
(
*
blocked_it
))
{
*
x_it
=
alpha
*
(
*
b_it
/
*
A_it
);
}
}
}
/* -------------------------------------------------------------------------- */
}
// akantu
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