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test_lumped_mass.cc
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Thu, Jun 27, 21:35

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: Thu Mar 27 2014
* @date last modification: Thu Oct 15 2015
*
* @brief test the lumping of the mass matrix
*
* @section LICENSE
*
* Copyright (©) 2014, 2015 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"
using namespace akantu;
/* -------------------------------------------------------------------------- */
int main(int argc, char *argv[])
{
UInt spatial_dimension = ElementClass<TYPE>::getSpatialDimension();
const ElementType type = TYPE;
akantu::initialize("material.dat", argc, argv);
Mesh mesh(spatial_dimension);
std::stringstream filename; filename << TYPE << ".msh";
mesh.read(filename.str());
SolidMechanicsModel model(mesh);
/// model initialization
model.initFull();
model.assembleMassLumped();
Real rho = model.getMaterial(0).getRho();
FEEngine & fem = model.getFEEngine();
UInt nb_element = mesh.getNbElement(type);
UInt nb_quadrature_points = fem.getNbIntegrationPoints(type) * nb_element;
Array<Real> rho_on_quad(nb_quadrature_points, 1, rho, "rho_on_quad");
Real mass = fem.integrate(rho_on_quad, type);
Array<Real>::const_vector_iterator mass_it = model.getMass().begin(spatial_dimension);
Array<Real>::const_vector_iterator mass_end = model.getMass().end(spatial_dimension);
Vector<Real> sum(spatial_dimension, 0.);
for(; mass_it != mass_end; ++mass_it) {
sum += *mass_it;
}
std::cout << mass << std::endl << sum << std::endl;
if(!(std::abs((mass - sum[0])/mass) < 2e-15)) {
std::cerr << "total mass is not correct" << std::endl;
return EXIT_FAILURE;
}
for(UInt i = 1; i < spatial_dimension; ++i)
if(!(std::abs((sum[0] - sum[i])/mass) < 1e-15)) {
std::cerr << "total mass is not correct" << std::endl;
return EXIT_FAILURE;
}
finalize();
return EXIT_SUCCESS;
}

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