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bem_grid_condat.cpp
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rTAMAAS tamaas
bem_grid_condat.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_condat.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_TAMAAS__
BemGridCondat
::
BemGridCondat
(
Surface
<
Real
>
&
surface
)
:
BemGridKato
(
surface
),
grad_step
(
1.8
),
q_step
(
0.1
)
{}
/* -------------------------------------------------------------------------- */
BemGridCondat
::~
BemGridCondat
()
{}
/* -------------------------------------------------------------------------- */
void
BemGridCondat
::
updateGradient
(
Grid
<
Real
,
1
>
&
q_vec
)
{
Real
tmp
[
3
]
=
{
0
};
VectorProxy
<
Real
>
q
(
q_vec
.
getInternalData
(),
3
),
g
(
nullptr
,
3
),
q_N
(
tmp
,
3
);
const
UInt
N
=
gaps
.
getNbPoints
();
q_N
=
q
;
q_N
*=
q_step
;
#pragma omp parallel for firstprivate(g)
for
(
UInt
i
=
0
;
i
<
N
;
i
++
)
{
g
.
setPointer
(
gaps
.
getInternalData
()
+
i
*
g
.
dataSize
());
g
*=
grad_step
/
lipschitz
;
g
+=
q
;
}
}
/* -------------------------------------------------------------------------- */
void
BemGridCondat
::
computeEquilibrium
(
Real
tol
,
const
Grid
<
Real
,
1
>
&
p_target
)
{
this
->
computeInfluence
();
Real
f
=
0
;
UInt
n_iter
=
0
;
TAMAAS_ASSERT
(
p_target
.
dataSize
()
==
3
,
"Applied pressure must have only 3 components"
);
TAMAAS_ASSERT
(
q_step
>
0
&&
q_step
<
1
,
"q step should be in ]0, 1["
);
TAMAAS_ASSERT
(
grad_step
*
lipschitz
<
2
*
(
1
-
q_step
),
"grad step * lipschitz should be less than 2 q steps"
);
this
->
tractions
.
uniformSetComponents
(
p_target
);
Real
q_mem
[
3
]
=
{
0
};
Real
e_mem
[
3
]
=
{
0
};
Real
pn_mem
[
3
]
=
{
0
};
Real
pn1_mem
[
3
]
=
{
0
};
Real
zero_mem
[
3
]
=
{
0
};
VectorProxy
<
Real
>
q
(
q_mem
,
3
),
e
(
e_mem
,
3
),
pn
(
pn_mem
,
3
),
pn1
(
pn1_mem
,
3
),
zero
(
zero_mem
,
3
);
Real
norm
=
p_target
(
0
)
*
p_target
(
0
)
+
p_target
(
1
)
*
p_target
(
1
)
+
p_target
(
2
)
*
p_target
(
2
);
do
{
computeDisplacementsFromTractions
();
computeGaps
(
displacements
);
updateGradient
(
q
);
beta
=
computeLambda
();
BemGrid
::
computeMeanValueError
(
tractions
,
zero
,
pn
);
tractions
-=
gaps
;
BemGrid
::
projectOnFrictionCone
(
tractions
,
mu
);
BemGrid
::
computeMeanValueError
(
tractions
,
zero
,
pn1
);
pn1
*=
2
;
q
-=
p_target
;
q
+=
pn1
;
q
-=
pn
;
lambda
-=
beta
;
f
=
computeStoppingCriterion
();
printFriendlyMessage
(
n_iter
,
f
);
}
while
((
f
>
tol
||
e
.
l2norm
()
/
std
::
sqrt
(
norm
)
>
tol
)
&&
n_iter
++
<
this
->
max_iter
);
}
__END_TAMAAS__
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