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bem_grid_teboulle.cpp
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rTAMAAS tamaas
bem_grid_teboulle.cpp
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/**
*
* @author Lucas Frérot <lucas.frerot@epfl.ch>
*
* @section LICENSE
*
* Copyright (©) 2016 EPFL (Ecole Polytechnique Fédérale de
* Lausanne) Laboratory (LSMS - Laboratoire de Simulation en Mécanique des
* Solides)
*
* Tamaas 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.
*
* Tamaas 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 Tamaas. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "bem_grid_teboulle.hh"
#include "surface_statistics.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_TAMAAS__
BemGridTeboulle
::
BemGridTeboulle
(
Surface
<
Real
>
&
s
)
:
BemGridKato
(
s
),
z
(
s
.
sizes
(),
s
.
lengths
(),
3
),
tractions_old
(
s
.
sizes
(),
s
.
lengths
(),
3
)
{}
/* -------------------------------------------------------------------------- */
BemGridTeboulle
::~
BemGridTeboulle
()
{}
/* -------------------------------------------------------------------------- */
void
BemGridTeboulle
::
computeEquilibrium
(
Real
tol
,
const
Grid
<
Real
,
1
>
&
g_target
)
{
this
->
computeInfluence
();
Real
f
=
0
,
l
=
0
;
Real
t
[
2
]
=
{
1
,
1
};
UInt
n_iter
=
0
;
TAMAAS_ASSERT
(
g_target
.
dataSize
()
==
3
,
"Applied pressure must have only 3 components"
);
// Real surface_mean = SurfaceStatistics::computeAverage(this->surface, 0);
// this->surface -= (surface_mean + g_target(2));
do
{
applyInfluenceFunctions
(
z
,
displacements
);
computeGaps
(
displacements
);
updateGradient
(
const_cast
<
Grid
<
Real
,
1
>&>
(
g_target
));
beta
=
computeLambda
();
gaps
/=
lipschitz
;
z
-=
gaps
;
BemGrid
::
projectOnFrictionCone
(
z
,
mu
);
tractions
=
z
;
t
[
1
]
=
(
1.
+
std
::
sqrt
(
4
*
t
[
0
]
*
t
[
0
]
+
1
))
/
2.
;
l
=
1
+
(
t
[
0
]
-
1
)
/
t
[
1
];
z
-=
tractions_old
;
z
*=
l
;
z
+=
tractions_old
;
t
[
0
]
=
t
[
1
];
tractions_old
=
tractions
;
lambda
-=
beta
;
f
=
computeStoppingCriterion
();
printFriendlyMessage
(
n_iter
,
f
);
}
while
(
f
>
tol
&&
n_iter
++
<
this
->
max_iter
);
gaps
*=
lipschitz
;
//computeDisplacementsFromTractions();
//computeGaps(displacements);
}
__END_TAMAAS__
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