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rTAMAAS tamaas
westergaard.cpp
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/**
* @file
*
* @author Lucas Frérot <lucas.frerot@epfl.ch>
*
* @section LICENSE
*
* Copyright (©) 2017 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 "westergaard.hh"
#include "fft_plan_manager.hh"
#include "influence.hh"
#include "loop.hh"
#include "model.hh"
#include "static_types.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_TAMAAS__
/* -------------------------------------------------------------------------- */
template
<
model_type
type
>
Westergaard
<
type
>::
Westergaard
(
Model
*
model
)
:
BEEngine
(
model
)
{
// Copy sizes
std
::
array
<
UInt
,
trait
::
dimension
>
sizes
;
std
::
copy
(
model
->
getDiscretization
().
begin
(),
model
->
getDiscretization
().
end
(),
sizes
.
begin
());
auto
hermitian_sizes
=
GridHermitian
<
Real
,
trait
::
dimension
>::
hermitianDimensions
(
sizes
);
// Copy boundary sizes
auto
sizes_it
=
sizes
.
begin
();
std
::
array
<
UInt
,
trait
::
boundary_dimension
>
boundary_hermitian_sizes
;
// Ignoring first dimension if model is volumetric
if
(
trait
::
dimension
>
trait
::
boundary_dimension
)
++
sizes_it
;
std
::
copy
(
sizes_it
,
sizes
.
end
(),
boundary_hermitian_sizes
.
begin
());
boundary_hermitian_sizes
=
GridHermitian
<
Real
,
trait
::
boundary_dimension
>::
hermitianDimensions
(
boundary_hermitian_sizes
);
constexpr
UInt
nb_components
=
trait
::
components
;
buffer
.
setNbComponents
(
nb_components
);
buffer
.
resize
(
boundary_hermitian_sizes
);
influence
.
setNbComponents
(
nb_components
*
nb_components
);
influence
.
resize
(
hermitian_sizes
);
}
/* -------------------------------------------------------------------------- */
template
<
model_type
type
>
void
Westergaard
<
type
>::
initInfluence
()
{
TAMAAS_EXCEPTION
(
"Not implemented"
);
}
/* -------------------------------------------------------------------------- */
#define INFLUENCE_BASIC_MACRO \
do { \
constexpr UInt bdim = trait::boundary_dimension; \
auto wavevectors = \
FFTransform<Real, bdim>::computeFrequencies<true>(influence.sizes()); \
Real E_star = model->getHertzModulus(); \
VectorProxy<const Real, bdim> domain(model->getSystemSize()[0]); \
Loop::stridedLoop(influence::Basic<bdim>(E_star, domain), wavevectors, \
influence); \
influence(0) = 0; \
} while (0)
template
<>
void
Westergaard
<
model_type
::
basic_2d
>::
initInfluence
()
{
INFLUENCE_BASIC_MACRO
;
}
template
<>
void
Westergaard
<
model_type
::
basic_1d
>::
initInfluence
()
{
INFLUENCE_BASIC_MACRO
;
}
#undef INFLUENCE_BASIC_MACRO
#define INFLUENCE_SURFACE_MACRO \
do { \
constexpr UInt bdim = trait::boundary_dimension; \
auto wavevectors = \
FFTransform<Real, bdim>::computeFrequencies<true>(influence.sizes()); \
Real E = model->getYoungModulus(); \
Real nu = model->getPoissonRatio(); \
VectorProxy<const Real, bdim> domain(model->getSystemSize()[0]); \
Loop::stridedLoop(influence::Surface<bdim>(E, nu, domain), wavevectors, \
influence); \
} while (0)
template
<>
void
Westergaard
<
model_type
::
surface_1d
>::
initInfluence
()
{
INFLUENCE_SURFACE_MACRO
;
}
template
<>
void
Westergaard
<
model_type
::
surface_2d
>::
initInfluence
()
{
INFLUENCE_SURFACE_MACRO
;
}
#undef INFLUENCE_SURFACE_MACRO
/* ------------------------------------------------------------------------ */
#define NEUMANN_BASIC(type) \
template <> \
void Westergaard<type>::solveNeumann(GridBase<Real>& in, \
GridBase<Real>& out) const { \
auto apply = [](decltype(buffer)& buffer, \
const decltype(influence)& influence) { \
buffer *= influence; \
buffer(0) = 0; \
}; \
\
fourierApply(apply, in, out); \
}
#define DIRICHLET_BASIC(type) \
template <> \
void Westergaard<type>::solveDirichlet(GridBase<Real>& in, \
GridBase<Real>& out) const { \
auto apply = [](decltype(buffer)& buffer, \
const decltype(influence)& influence) { \
buffer /= influence; \
buffer(0) = 0; \
}; \
\
fourierApply(apply, in, out); \
}
NEUMANN_BASIC
(
model_type
::
basic_1d
);
NEUMANN_BASIC
(
model_type
::
basic_2d
);
DIRICHLET_BASIC
(
model_type
::
basic_1d
);
DIRICHLET_BASIC
(
model_type
::
basic_2d
);
#undef NEUMANN_BASIC
#undef DIRICHLET_BASIC
/* -------------------------------------------------------------------------- */
namespace
detail
{
/// Class needed for cuda
template
<
UInt
d
>
struct
SurfaceApply
{
void
operator
()(
GridHermitian
<
Real
,
d
>&
buffer_
,
const
GridHermitian
<
Real
,
d
>&
influence
)
{
Loop
::
stridedLoop
(
[]
CUDA_LAMBDA
(
VectorProxy
<
Complex
,
d
+
1
>
&&
buf
,
MatrixProxy
<
const
Complex
,
d
+
1
,
d
+
1
>
&&
inf
)
{
Vector
<
Complex
,
d
+
1
>
copy
(
buf
);
buf
.
mul
(
inf
,
copy
);
},
buffer_
,
influence
);
VectorProxy
<
Complex
,
d
+
1
>
buff_0
(
buffer_
(
0
));
buff_0
=
0
;
}
};
}
// namespace detail
#define NEUMANN_SURFACE(type) \
template <> \
void Westergaard<type>::solveNeumann(GridBase<Real>& in, \
GridBase<Real>& out) const { \
fourierApply(detail::SurfaceApply<trait::boundary_dimension>(), in, out); \
}
/// \TODO Find a way to make it work with cuda
NEUMANN_SURFACE
(
model_type
::
surface_1d
);
NEUMANN_SURFACE
(
model_type
::
surface_2d
);
#undef NEUMANN_SURFACE
/* -------------------------------------------------------------------------- */
template
<
model_type
type
>
void
Westergaard
<
type
>::
solveNeumann
(
GridBase
<
Real
>&
/*neumann*/
,
GridBase
<
Real
>&
/*dirichlet*/
)
const
{
TAMAAS_EXCEPTION
(
"Not yet implemented"
);
}
/* -------------------------------------------------------------------------- */
template
<
model_type
type
>
void
Westergaard
<
type
>::
solveDirichlet
(
GridBase
<
Real
>&
/*neumann*/
,
GridBase
<
Real
>&
/*dirichlet*/
)
const
{
TAMAAS_EXCEPTION
(
"Not yet implemented"
);
}
/* -------------------------------------------------------------------------- */
/* Template instanciation */
/* -------------------------------------------------------------------------- */
template
class
Westergaard
<
model_type
::
basic_1d
>
;
template
class
Westergaard
<
model_type
::
basic_2d
>
;
template
class
Westergaard
<
model_type
::
surface_1d
>
;
template
class
Westergaard
<
model_type
::
surface_2d
>
;
template
class
Westergaard
<
model_type
::
volume_1d
>
;
template
class
Westergaard
<
model_type
::
volume_2d
>
;
/* -------------------------------------------------------------------------- */
__END_TAMAAS__
/* -------------------------------------------------------------------------- */
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