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solid_mechanics_model_mass.cc
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Tue, May 7, 01:54

solid_mechanics_model_mass.cc
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/**
* @file solid_mechanics_model_mass.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Tue Oct 05 2010
* @date last modification: Thu Jun 05 2014
*
* @brief function handling mass computation
*
* @section LICENSE
*
* Copyright (©) 2010-2012, 2014 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 "material.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_AKANTU__
/* -------------------------------------------------------------------------- */
void SolidMechanicsModel::assembleMassLumped() {
AKANTU_DEBUG_IN();
UInt nb_nodes = mesh.getNbNodes();
if (!mass) {
std::stringstream sstr_mass; sstr_mass << id << ":mass";
mass = &(alloc<Real>(sstr_mass.str(), nb_nodes, spatial_dimension, 0));
} else
mass->clear();
assembleMassLumped(_not_ghost);
assembleMassLumped(_ghost);
/// for not connected nodes put mass to one in order to avoid
/// wrong range in paraview
Real * mass_values = mass->storage();
for (UInt i = 0; i < nb_nodes; ++i) {
if (fabs(mass_values[i]) < std::numeric_limits<Real>::epsilon() || Math::isnan(mass_values[i]))
mass_values[i] = 1.;
}
synch_registry->synchronize(_gst_smm_mass);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void SolidMechanicsModel::assembleMassLumped(GhostType ghost_type) {
AKANTU_DEBUG_IN();
FEEngine & fem = getFEEngine();
Array<Real> rho_1(0,1);
Mesh::type_iterator it = mesh.firstType(spatial_dimension, ghost_type);
Mesh::type_iterator end = mesh.lastType(spatial_dimension, ghost_type);
for(; it != end; ++it) {
ElementType type = *it;
computeRho(rho_1, type, ghost_type);
AKANTU_DEBUG_ASSERT(dof_synchronizer,
"DOFSynchronizer number must not be initialized");
fem.assembleFieldLumped(rho_1, spatial_dimension,*mass,
dof_synchronizer->getLocalDOFEquationNumbers(),
type, ghost_type);
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void SolidMechanicsModel::assembleMass() {
AKANTU_DEBUG_IN();
if(!mass_matrix) {
std::stringstream sstr; sstr << id << ":mass_matrix";
mass_matrix = new SparseMatrix(*jacobian_matrix, sstr.str(), memory_id);
}
assembleMass(_not_ghost);
// assembleMass(_ghost);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void SolidMechanicsModel::assembleMass(GhostType ghost_type) {
AKANTU_DEBUG_IN();
MyFEEngineType & fem = getFEEngineClass<MyFEEngineType>();
Array<Real> rho_1(0,1);
//UInt nb_element;
mass_matrix->clear();
Mesh::type_iterator it = mesh.firstType(spatial_dimension, ghost_type);
Mesh::type_iterator end = mesh.lastType(spatial_dimension, ghost_type);
for(; it != end; ++it) {
ElementType type = *it;
computeRho(rho_1, type, ghost_type);
fem.assembleFieldMatrix(rho_1, spatial_dimension, *mass_matrix, type, ghost_type);
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void SolidMechanicsModel::computeRho(Array<Real> & rho,
ElementType type,
GhostType ghost_type) {
AKANTU_DEBUG_IN();
Material ** mat_val = &(materials.at(0));
FEEngine & fem = getFEEngine();
UInt nb_element = fem.getMesh().getNbElement(type,ghost_type);
Array<UInt> & elem_mat_val = element_index_by_material(type, ghost_type);
UInt nb_quadrature_points = fem.getNbQuadraturePoints(type, ghost_type);
rho.resize(nb_element * nb_quadrature_points);
Real * rho_1_val = rho.storage();
/// compute @f$ rho @f$ for each nodes of each element
for (UInt el = 0; el < nb_element; ++el) {
Real mat_rho = mat_val[elem_mat_val(el, 0)]->getParam<Real>("rho"); /// here rho is constant in an element
for (UInt n = 0; n < nb_quadrature_points; ++n) {
*rho_1_val++ = mat_rho;
}
}
AKANTU_DEBUG_OUT();
}
__END_AKANTU__

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