Page MenuHomec4science
Files F68654434

kelvin.cpp
No OneTemporary
Actions

File Metadata

Created
Fri, Jun 28, 08:42

kelvin.cpp
View Options

/**
* @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 "kelvin.hh"
#include "elasto_plastic_model.hh"
#include "influence.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_TAMAAS__
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
/* Volume 2D implementation */
/* -------------------------------------------------------------------------- */
template <>
Kelvin<model_type::volume_2d, 2>::Kelvin(Model* model)
: VolumePotential(model) {
// Copy horizontal sizes
std::array<UInt, trait::boundary_dimension> sizes;
std::copy(model->getDiscretization().begin() + 1,
model->getDiscretization().end(), sizes.begin());
auto hermitian_sizes =
GridHermitian<Real, trait::boundary_dimension>::hermitianDimensions(
sizes);
/// Initializing buffers
auto initialize = [this, &hermitian_sizes](std::vector<BufferType>& buffers) {
buffers.resize(this->model->getDiscretization()[0]);
std::for_each(buffers.begin(), buffers.end(),
[&hermitian_sizes](BufferType& buffer) {
buffer.setNbComponents(trait::components);
buffer.resize(hermitian_sizes);
});
};
initialize(source_buffers);
disp_buffer.setNbComponents(trait::components);
disp_buffer.resize(hermitian_sizes);
}
template <>
void Kelvin<model_type::volume_2d, 2>::apply(GridBase<Real>& source,
GridBase<Real>& out) const {
Real nu = model->getPoissonRatio(), mu = model->getShearModulus();
VectorProxy<const Real, trait::dimension> domain(model->getSystemSize()[0]);
influence::Kelvin<trait::dimension, 0> kelvin(mu, nu);
auto apply = [this, &kelvin](UInt i, decltype(source_buffers)& source_buffers,
decltype(disp_buffer)& displacement) {
constexpr UInt dim = trait::dimension;
const Real L = this->model->getSystemSize().front();
const UInt N = this->model->getDiscretization().front();
const Real dl = L / N;
// Compute displacements u_i
displacement = 0;
for (UInt j : Loop::range(N)) {
const Real dij = j * dl - i * dl; // don't factorize!
auto& source = source_buffers[j];
#define POTENTIAL(yj_xi) \
Loop::stridedLoop( \
[&kelvin, dij, dl](VectorProxy<Complex, dim>&& u, \
VectorProxy<Complex, dim>&& f, \
VectorProxy<const Real, dim - 1>&& q) { \
/* Cutoff */ \
if (-q.l2norm() * std::abs(dij) < std::log(1e-2)) \
return; \
influence::KelvinIntegrator::integrate<yj_xi>(u, f, kelvin, q, dij, \
dl); \
}, \
displacement, source, this->wavevectors)
if (j > i) {
POTENTIAL(1);
} else if (j == i) {
POTENTIAL(0);
} else {
POTENTIAL(-1);
}
#undef POTENTIAL
}
// Setting fundamental frequency to zero
VectorProxy<Complex, dim> u_fundamental(displacement(0));
u_fundamental = 0;
};
this->fourierApply(apply, source, out);
}
template <>
Kelvin<model_type::volume_2d, 3>::Kelvin(Model* model)
: VolumePotential(model) {
// Copy horizontal sizes
std::array<UInt, trait::boundary_dimension> sizes;
std::copy(model->getDiscretization().begin() + 1,
model->getDiscretization().end(), sizes.begin());
auto hermitian_sizes =
GridHermitian<Real, trait::boundary_dimension>::hermitianDimensions(
sizes);
/// Initializing buffers
auto initialize = [this, &hermitian_sizes](std::vector<BufferType>& buffers) {
buffers.resize(this->model->getDiscretization()[0]);
std::for_each(
buffers.begin(), buffers.end(), [&hermitian_sizes](BufferType& buffer) {
buffer.setNbComponents(trait::components * trait::components);
buffer.resize(hermitian_sizes);
});
};
initialize(source_buffers);
disp_buffer.setNbComponents(trait::components);
disp_buffer.resize(hermitian_sizes);
}
template <>
void Kelvin<model_type::volume_2d, 3>::apply(GridBase<Real>& source,
GridBase<Real>& out) const {
Real nu = model->getPoissonRatio(), mu = model->getShearModulus();
VectorProxy<const Real, trait::dimension> domain(model->getSystemSize()[0]);
influence::Kelvin<trait::dimension, 1> kelvin(mu, nu);
auto apply = [this, &kelvin](UInt i, decltype(source_buffers)& source_buffers,
decltype(disp_buffer)& displacement) {
constexpr UInt dim = trait::dimension;
const Real L = this->model->getSystemSize().front();
const UInt N = this->model->getDiscretization().front();
const Real dl = L / N;
// Compute displacements u_i
displacement = 0;
for (UInt j : Loop::range(N)) {
const Real dij = j * dl - i * dl; // don't factorize!
auto& source = source_buffers[j];
#define POTENTIAL(yj_xi) \
Loop::stridedLoop( \
[&kelvin, dij, dl](VectorProxy<Complex, dim>&& u, \
MatrixProxy<Complex, dim, dim>&& f, \
VectorProxy<const Real, dim - 1>&& q) { \
/* Cutoff */ \
if (-q.l2norm() * std::abs(dij) < std::log(1e-2)) \
return; \
influence::KelvinIntegrator::integrate<yj_xi>(u, f, kelvin, q, dij, \
dl); \
}, \
displacement, source, this->wavevectors)
if (j > i) {
POTENTIAL(1);
} else if (j == i) {
POTENTIAL(0);
} else {
POTENTIAL(-1);
}
#undef POTENTIAL
}
// Setting fundamental frequency to zero
VectorProxy<Complex, dim> u_fundamental(displacement(0));
u_fundamental = 0;
};
this->fourierApply(apply, source, out);
}
template <model_type type, UInt tensor_order>
void Kelvin<type, tensor_order>::apply(GridBase<Real>& source,
GridBase<Real>& out) const {
TAMAAS_EXCEPTION("The requested operator has not been implemented");
}
/* -------------------------------------------------------------------------- */
/* Template instanciation */
/* -------------------------------------------------------------------------- */
template class Kelvin<model_type::volume_1d, 2>;
template class Kelvin<model_type::volume_2d, 2>;
/* -------------------------------------------------------------------------- */
__END_TAMAAS__

Event Timeline

c4science · Help