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test_lumped_mass.cc
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/**
* @file test_lumped_mass.cc
*
* @author Daniel Pino Muñoz <daniel.pinomunoz@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Tue Dec 05 2017
* @date last modification: Tue Jan 30 2018
*
* @brief test the lumping of the mass matrix
*
* @section LICENSE
*
* Copyright (©) 2016-2018 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu 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.
*
* Akantu 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 Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "solid_mechanics_model.hh"
#include "test_gtest_utils.hh"
/* -------------------------------------------------------------------------- */
#include <gtest/gtest.h>
#include <tuple>
/* -------------------------------------------------------------------------- */
using namespace akantu;
template <typename tuple_>
class TestLumpedMassesFixture : public ::testing::Test {
public:
static constexpr ElementType type = tuple_::value;
static constexpr size_t dim = ElementClass<type>::getSpatialDimension();
void SetUp() override {
debug::setDebugLevel(dblError);
getStaticParser().parse("material_lumped.dat");
std::stringstream element_type;
element_type << type;
mesh = std::make_unique<Mesh>(dim);
mesh->read(element_type.str() + ".msh");
SCOPED_TRACE(element_type.str().c_str());
model = std::make_unique<SolidMechanicsModel>(*mesh);
model->initFull(_analysis_method = _explicit_lumped_mass);
}
void TearDown() override {
model.reset(nullptr);
mesh.reset(nullptr);
}
protected:
std::unique_ptr<Mesh> mesh;
std::unique_ptr<SolidMechanicsModel> model;
};
template <typename T> constexpr ElementType TestLumpedMassesFixture<T>::type;
template <typename T> constexpr size_t TestLumpedMassesFixture<T>::dim;
using mass_types = gtest_list_t<TestElementTypes>;
TYPED_TEST_SUITE(TestLumpedMassesFixture, mass_types);
TYPED_TEST(TestLumpedMassesFixture, TestLumpedMass) {
this->model->assembleMassLumped();
auto rho = this->model->getMaterial(0).getRho();
auto & fem = this->model->getFEEngine();
auto nb_element = this->mesh->getNbElement(this->type);
auto nb_quadrature_points =
fem.getNbIntegrationPoints(this->type) * nb_element;
Array<Real> rho_on_quad(nb_quadrature_points, 1, rho, "rho_on_quad");
auto mass = fem.integrate(rho_on_quad, this->type);
const auto & masses = this->model->getMass();
Vector<Real> sum(this->dim, 0.);
for (auto & mass : make_view(masses, this->dim)) {
sum += mass;
}
for (UInt s = 0; s < sum.size(); ++s)
EXPECT_NEAR(0., (mass - sum[s]) / mass, 2e-15);
}

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