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boussinesq_helper.hh
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Mon, Nov 4, 01:50

boussinesq_helper.hh
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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/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef BOUSSINESQ_HELPER_HH
#define BOUSSINESQ_HELPER_HH
/* -------------------------------------------------------------------------- */
#include "grid.hh"
#include "grid_hermitian.hh"
#include "influence.hh"
#include "integration/accumulator.hh"
#include "kelvin_helper.hh"
#include "model.hh"
#include "model_type.hh"
/* -------------------------------------------------------------------------- */
namespace tamaas {
namespace detail {
template <model_type type, typename boussinesq_t>
struct BoussinesqHelper {
using trait = model_type_traits<type>;
static constexpr UInt dim = trait::dimension;
static constexpr UInt bdim = trait::boundary_dimension;
using BufferType = GridHermitian<Real, bdim>;
using source_t = typename KelvinTrait<boussinesq_t>::source_t;
using out_t = typename KelvinTrait<boussinesq_t>::out_t;
template <bool apply_q_power>
void apply(BufferType& tractions, std::vector<BufferType>& out,
const Grid<Real, bdim>& wavevectors, Real domain_size,
const boussinesq_t& boussinesq) {
accumulator.makeUniformMesh(out.size(), domain_size);
auto& nodes = accumulator.nodePositions();
for (UInt l : Loop::range(out.size())) {
const auto xl = nodes[l];
Loop::loop(
[xl, &boussinesq](auto qv, auto u, auto t) {
const auto q = qv.l2norm();
const auto e = std::exp(-q * xl);
// g0 part
auto tmp = boussinesq.template applyU0<apply_q_power>(t, qv);
tmp *= e;
u += tmp;
// g1 part
tmp = boussinesq.template applyU1<apply_q_power>(t, qv);
tmp *= q * xl * e;
u += tmp;
},
range<VectorProxy<const Real, bdim>>(wavevectors).headless(),
range<out_t>(out[l]).headless(),
range<source_t>(tractions).headless());
}
}
// add constant term if necessary
void makeFundamentalModeGreatAgain(BufferType& /*tractions*/,
std::vector<BufferType>& /*out*/,
influence::ElasticHelper<dim>& /*el*/) {}
// add constant term to a single layer
template <typename ST>
void makeFundamentalModeGreatAgain(StaticVector<Complex, ST, dim>& /*t*/,
out_t& /*u*/,
influence::ElasticHelper<dim>& /*el*/) {}
protected:
Accumulator<type, source_t> accumulator; ///< really only here for mesh
};
template <>
template <typename ST>
inline void
BoussinesqHelper<model_type::volume_2d, influence::Boussinesq<3, 1>>::
makeFundamentalModeGreatAgain(StaticVector<Complex, ST, dim>& t, out_t& u,
influence::ElasticHelper<dim>& el) {
u(2, 0) = -t(0) / el.mu;
u(2, 1) = -t(1) / el.mu;
u(2, 2) = -t(2) / (el.lambda + 2 * el.mu);
}
template <>
inline void
BoussinesqHelper<model_type::volume_2d, influence::Boussinesq<3, 1>>::
makeFundamentalModeGreatAgain(BufferType& tractions,
std::vector<BufferType>& out,
influence::ElasticHelper<dim>& el) {
VectorProxy<Complex, dim> t(&tractions(0));
for (auto&& grid : out) {
out_t u(&grid(0));
makeFundamentalModeGreatAgain(t, u, el);
}
}
} // namespace detail
} // namespace tamaas
#endif // BOUSSINESQ_HELPER_HH
/* -------------------------------------------------------------------------- */

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