Page MenuHomec4science
Files F60588318

structural_mechanics_model.cc
No OneTemporary
Actions

File Metadata

Created
Wed, May 1, 07:27

structural_mechanics_model.cc
View Options

/**
* @file structural_mechanics_model.cc
*
* @author Fabian Barras <fabian.barras@epfl.ch>
* @author Sébastien Hartmann <sebastien.hartmann@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @author Damien Spielmann <damien.spielmann@epfl.ch>
*
* @date creation: Fri Jul 15 2011
* @date last modification: Thu Oct 15 2015
*
* @brief Model implementation for StucturalMechanics elements
*
* @section LICENSE
*
* Copyright (©) 2010-2012, 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 "structural_mechanics_model.hh"
#include "group_manager_inline_impl.cc"
#include "dumpable_inline_impl.hh"
#include "aka_math.hh"
#include "integration_scheme_2nd_order.hh"
#include "static_communicator.hh"
#include "sparse_matrix.hh"
#include "solver.hh"
#ifdef AKANTU_USE_MUMPS
#include "solver_mumps.hh"
#endif
#ifdef AKANTU_USE_IOHELPER
# include "dumper_paraview.hh"
# include "dumper_elemental_field.hh"
#endif
/* -------------------------------------------------------------------------- */
__BEGIN_AKANTU__
const StructuralMechanicsModelOptions default_structural_mechanics_model_options(_static);
/* -------------------------------------------------------------------------- */
StructuralMechanicsModel::StructuralMechanicsModel(Mesh & mesh,
UInt dim,
const ID & id,
const MemoryID & memory_id) :
Model(mesh, dim, id, memory_id),
time_step(NAN), f_m2a(1.0),
stress("stress", id, memory_id),
element_material("element_material", id, memory_id),
set_ID("beam sets", id, memory_id),
stiffness_matrix(NULL),
mass_matrix(NULL),
velocity_damping_matrix(NULL),
jacobian_matrix(NULL),
solver(NULL),
rotation_matrix("rotation_matices", id, memory_id),
increment_flag(false),
integrator(NULL) {
AKANTU_DEBUG_IN();
registerFEEngineObject<MyFEEngineType>("StructuralMechanicsFEEngine", mesh, spatial_dimension);
this->displacement_rotation = NULL;
this->mass = NULL;
this->velocity = NULL;
this->acceleration = NULL;
this->force_momentum = NULL;
this->residual = NULL;
this->blocked_dofs = NULL;
this->increment = NULL;
this->previous_displacement = NULL;
if(spatial_dimension == 2)
nb_degree_of_freedom = 3;
else if (spatial_dimension == 3)
nb_degree_of_freedom = 6;
else {
AKANTU_DEBUG_TO_IMPLEMENT();
}
this->mesh.registerDumper<DumperParaview>("paraview_all", id, true);
this->mesh.addDumpMesh(mesh, spatial_dimension, _not_ghost, _ek_structural);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
StructuralMechanicsModel::~StructuralMechanicsModel() {
AKANTU_DEBUG_IN();
delete integrator;
delete solver;
delete stiffness_matrix;
delete jacobian_matrix;
delete mass_matrix;
delete velocity_damping_matrix;
AKANTU_DEBUG_OUT();
}
void StructuralMechanicsModel::setTimeStep(Real time_step) {
this->time_step = time_step;
#if defined(AKANTU_USE_IOHELPER)
this->mesh.getDumper().setTimeStep(time_step);
#endif
}
/* -------------------------------------------------------------------------- */
/* Initialisation */
/* -------------------------------------------------------------------------- */
void StructuralMechanicsModel::initFull(const ModelOptions & options) {
const StructuralMechanicsModelOptions & stmm_options =
dynamic_cast<const StructuralMechanicsModelOptions &>(options);
method = stmm_options.analysis_method;
initModel();
initArrays();
displacement_rotation->clear();
velocity ->clear();
acceleration ->clear();
force_momentum ->clear();
residual ->clear();
blocked_dofs ->clear();
increment ->clear();
Mesh::type_iterator it = getFEEngine().getMesh().firstType(spatial_dimension, _not_ghost, _ek_structural);
Mesh::type_iterator end = getFEEngine().getMesh().lastType(spatial_dimension, _not_ghost, _ek_structural);
for (; it != end; ++it) {
computeRotationMatrix(*it);
}
switch(method) {
case _implicit_dynamic:
initImplicit();
break;
case _static:
initSolver();
break;
default:
AKANTU_EXCEPTION("analysis method not recognised by StructuralMechanicsModel");
break;
}
}
/* -------------------------------------------------------------------------- */
void StructuralMechanicsModel::initArrays() {
AKANTU_DEBUG_IN();
UInt nb_nodes = getFEEngine().getMesh().getNbNodes();
std::stringstream sstr_disp; sstr_disp << id << ":displacement";
std::stringstream sstr_velo; sstr_velo << id << ":velocity";
std::stringstream sstr_acce; sstr_acce << id << ":acceleration";
std::stringstream sstr_forc; sstr_forc << id << ":force";
std::stringstream sstr_resi; sstr_resi << id << ":residual";
std::stringstream sstr_boun; sstr_boun << id << ":blocked_dofs";
std::stringstream sstr_incr; sstr_incr << id << ":increment";
displacement_rotation = &(alloc<Real>(sstr_disp.str(), nb_nodes, nb_degree_of_freedom, REAL_INIT_VALUE));
velocity = &(alloc<Real>(sstr_velo.str(), nb_nodes, nb_degree_of_freedom, REAL_INIT_VALUE));
acceleration = &(alloc<Real>(sstr_acce.str(), nb_nodes, nb_degree_of_freedom, REAL_INIT_VALUE));
force_momentum = &(alloc<Real>(sstr_forc.str(), nb_nodes, nb_degree_of_freedom, REAL_INIT_VALUE));
residual = &(alloc<Real>(sstr_resi.str(), nb_nodes, nb_degree_of_freedom, REAL_INIT_VALUE));
blocked_dofs = &(alloc<bool>(sstr_boun.str(), nb_nodes, nb_degree_of_freedom, false));
increment = &(alloc<Real>(sstr_incr.str(), nb_nodes, nb_degree_of_freedom, REAL_INIT_VALUE));
Mesh::type_iterator it = getFEEngine().getMesh().firstType(spatial_dimension, _not_ghost, _ek_structural);
Mesh::type_iterator end = getFEEngine().getMesh().lastType(spatial_dimension, _not_ghost, _ek_structural);
for (; it != end; ++it) {
UInt nb_element = getFEEngine().getMesh().getNbElement(*it);
UInt nb_quadrature_points = getFEEngine().getNbIntegrationPoints(*it);
element_material.alloc(nb_element, 1, *it, _not_ghost);
set_ID.alloc(nb_element, 1, *it, _not_ghost);
UInt size = getTangentStiffnessVoigtSize(*it);
stress.alloc(nb_element * nb_quadrature_points, size , *it, _not_ghost);
}
dof_synchronizer = new DOFSynchronizer(getFEEngine().getMesh(), nb_degree_of_freedom);
dof_synchronizer->initLocalDOFEquationNumbers();
dof_synchronizer->initGlobalDOFEquationNumbers();
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void StructuralMechanicsModel::initModel() {
getFEEngine().initShapeFunctions(_not_ghost);
}
/* -------------------------------------------------------------------------- */
void StructuralMechanicsModel::initSolver(__attribute__((unused)) SolverOptions & options) {
AKANTU_DEBUG_IN();
const Mesh & mesh = getFEEngine().getMesh();
#if !defined(AKANTU_USE_MUMPS) // or other solver in the future \todo add AKANTU_HAS_SOLVER in CMake
AKANTU_DEBUG_ERROR("You should at least activate one solver.");
#else
UInt nb_global_node = mesh.getNbGlobalNodes();
std::stringstream sstr; sstr << id << ":jacobian_matrix";
jacobian_matrix = new SparseMatrix(nb_global_node * nb_degree_of_freedom, _symmetric, sstr.str(), memory_id);
jacobian_matrix->buildProfile(mesh, *dof_synchronizer, nb_degree_of_freedom);
std::stringstream sstr_sti; sstr_sti << id << ":stiffness_matrix";
stiffness_matrix = new SparseMatrix(*jacobian_matrix, sstr_sti.str(), memory_id);
#ifdef AKANTU_USE_MUMPS
std::stringstream sstr_solv; sstr_solv << id << ":solver";
solver = new SolverMumps(*jacobian_matrix, sstr_solv.str());
dof_synchronizer->initScatterGatherCommunicationScheme();
#else
AKANTU_DEBUG_ERROR("You should at least activate one solver.");
#endif //AKANTU_USE_MUMPS
solver->initialize(options);
#endif //AKANTU_HAS_SOLVER
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void StructuralMechanicsModel::initImplicit(bool dynamic, SolverOptions & solver_options) {
AKANTU_DEBUG_IN();
if (!increment) setIncrementFlagOn();
initSolver(solver_options);
if(integrator) delete integrator;
integrator = new TrapezoidalRule2();
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
UInt StructuralMechanicsModel::getTangentStiffnessVoigtSize(const ElementType & type) {
UInt size;
#define GET_TANGENT_STIFFNESS_VOIGT_SIZE(type) \
size = getTangentStiffnessVoigtSize<type>();
AKANTU_BOOST_STRUCTURAL_ELEMENT_SWITCH(GET_TANGENT_STIFFNESS_VOIGT_SIZE);
#undef GET_TANGENT_STIFFNESS_VOIGT_SIZE
return size;
}
/* -------------------------------------------------------------------------- */
void StructuralMechanicsModel::assembleStiffnessMatrix() {
AKANTU_DEBUG_IN();
stiffness_matrix->clear();
Mesh::type_iterator it = getFEEngine().getMesh().firstType(spatial_dimension, _not_ghost, _ek_structural);
Mesh::type_iterator end = getFEEngine().getMesh().lastType(spatial_dimension, _not_ghost, _ek_structural);
for (; it != end; ++it) {
ElementType type = *it;
#define ASSEMBLE_STIFFNESS_MATRIX(type) \
assembleStiffnessMatrix<type>();
AKANTU_BOOST_STRUCTURAL_ELEMENT_SWITCH(ASSEMBLE_STIFFNESS_MATRIX);
#undef ASSEMBLE_STIFFNESS_MATRIX
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template<>
void StructuralMechanicsModel::computeRotationMatrix<_bernoulli_beam_2>(Array<Real> & rotations){
ElementType type = _bernoulli_beam_2;
Mesh & mesh = getFEEngine().getMesh();
UInt nb_element = mesh.getNbElement(type);
Array<UInt>::iterator< Vector<UInt> > connec_it = mesh.getConnectivity(type).begin(2);
Array<Real>::vector_iterator nodes_it = mesh.getNodes().begin(spatial_dimension);
Array<Real>::matrix_iterator R_it = rotations.begin(nb_degree_of_freedom, nb_degree_of_freedom);
for (UInt e = 0; e < nb_element; ++e, ++R_it, ++connec_it) {
Matrix<Real> & R = *R_it;
Vector<UInt> & connec = *connec_it;
Vector<Real> x2;
x2 = nodes_it[connec(1)]; // X2
Vector<Real> x1;
x1 = nodes_it[connec(0)]; // X1
Real le = x1.distance(x2);
Real c = (x2(0) - x1(0)) / le;
Real s = (x2(1) - x1(1)) / le;
/// Definition of the rotation matrix
R(0,0) = c; R(0,1) = s; R(0,2) = 0.;
R(1,0) = -s; R(1,1) = c; R(1,2) = 0.;
R(2,0) = 0.; R(2,1) = 0.; R(2,2) = 1.;
}
}
/* -------------------------------------------------------------------------- */
template<>
void StructuralMechanicsModel::computeRotationMatrix<_bernoulli_beam_3>(Array<Real> & rotations){
ElementType type = _bernoulli_beam_3;
Mesh & mesh = getFEEngine().getMesh();
UInt nb_element = mesh.getNbElement(type);
Array<Real>::vector_iterator n_it = mesh.getNormals(type).begin(spatial_dimension);
Array<UInt>::iterator< Vector<UInt> > connec_it = mesh.getConnectivity(type).begin(2);
Array<Real>::vector_iterator nodes_it = mesh.getNodes().begin(spatial_dimension);
Matrix<Real> Pe (spatial_dimension, spatial_dimension);
Matrix<Real> Pg (spatial_dimension, spatial_dimension);
Matrix<Real> inv_Pg(spatial_dimension, spatial_dimension);
Vector<Real> x_n(spatial_dimension); // x vect n
Array<Real>::matrix_iterator R_it =
rotations.begin(nb_degree_of_freedom, nb_degree_of_freedom);
for (UInt e=0 ; e < nb_element; ++e, ++n_it, ++connec_it, ++R_it) {
Vector<Real> & n = *n_it;
Matrix<Real> & R = *R_it;
Vector<UInt> & connec = *connec_it;
Vector<Real> x;
x = nodes_it[connec(1)]; // X2
Vector<Real> y;
y = nodes_it[connec(0)]; // X1
Real l = x.distance(y);
x -= y; // X2 - X1
x_n.crossProduct(x, n);
Pe.eye();
Pe(0, 0) *= l;
Pe(1, 1) *= -l;
Pg(0,0) = x(0); Pg(0,1) = x_n(0); Pg(0,2) = n(0);
Pg(1,0) = x(1); Pg(1,1) = x_n(1); Pg(1,2) = n(1);
Pg(2,0) = x(2); Pg(2,1) = x_n(2); Pg(2,2) = n(2);
inv_Pg.inverse(Pg);
Pe *= inv_Pg;
for (UInt i = 0; i < spatial_dimension; ++i) {
for (UInt j = 0; j < spatial_dimension; ++j) {
R(i, j) = Pe(i, j);
R(i + spatial_dimension,j + spatial_dimension) = Pe(i, j);
}
}
}
}
/* -------------------------------------------------------------------------- */
template<>
void StructuralMechanicsModel::computeRotationMatrix<_kirchhoff_shell>(Array<Real> & rotations){
ElementType type = _kirchhoff_shell;
Mesh & mesh = getFEEngine().getMesh();
UInt nb_element = mesh.getNbElement(type);
Array<UInt>::iterator< Vector<UInt> > connec_it = mesh.getConnectivity(type).begin(3);
Array<Real>::vector_iterator nodes_it = mesh.getNodes().begin(spatial_dimension);
Matrix<Real> Pe (spatial_dimension, spatial_dimension);
Matrix<Real> Pg (spatial_dimension, spatial_dimension);
Matrix<Real> inv_Pg(spatial_dimension, spatial_dimension);
Array<Real>::matrix_iterator R_it =
rotations.begin(nb_degree_of_freedom, nb_degree_of_freedom);
for (UInt e=0 ; e < nb_element; ++e, ++connec_it, ++R_it) {
Pe.eye();
Matrix<Real> & R = *R_it;
Vector<UInt> & connec = *connec_it;
Vector<Real> x2;
x2 = nodes_it[connec(1)]; // X2
Vector<Real> x1;
x1 = nodes_it[connec(0)]; // X1
Vector<Real> x3;
x3 = nodes_it[connec(2)]; // X3
Vector<Real> Pg_col_1=x2-x1;
Vector<Real> Pg_col_2 = x3-x1;
Vector<Real> Pg_col_3(spatial_dimension);
Pg_col_3.crossProduct(Pg_col_1, Pg_col_2);
for (UInt i = 0; i <spatial_dimension; ++i) {
Pg(i,0) = Pg_col_1(i);
Pg(i,1) = Pg_col_2(i);
Pg(i,2) = Pg_col_3(i);
}
inv_Pg.inverse(Pg);
// Pe *= inv_Pg;
Pe.eye();
for (UInt i = 0; i < spatial_dimension; ++i) {
for (UInt j = 0; j < spatial_dimension; ++j) {
R(i, j) = Pe(i, j);
R(i + spatial_dimension,j + spatial_dimension) = Pe(i, j);
}
}
}
}
/* -------------------------------------------------------------------------- */
void StructuralMechanicsModel::computeRotationMatrix(const ElementType & type) {
Mesh & mesh = getFEEngine().getMesh();
UInt nb_nodes_per_element = Mesh::getNbNodesPerElement(type);
UInt nb_element = mesh.getNbElement(type);
if(!rotation_matrix.exists(type)) {
rotation_matrix.alloc(nb_element,
nb_degree_of_freedom*nb_nodes_per_element * nb_degree_of_freedom*nb_nodes_per_element,
type);
} else {
rotation_matrix(type).resize(nb_element);
}
rotation_matrix(type).clear();
Array<Real>rotations(nb_element, nb_degree_of_freedom * nb_degree_of_freedom);
rotations.clear();
#define COMPUTE_ROTATION_MATRIX(type) \
computeRotationMatrix<type>(rotations);
AKANTU_BOOST_STRUCTURAL_ELEMENT_SWITCH(COMPUTE_ROTATION_MATRIX);
#undef COMPUTE_ROTATION_MATRIX
Array<Real>::matrix_iterator R_it = rotations.begin(nb_degree_of_freedom, nb_degree_of_freedom);
Array<Real>::matrix_iterator T_it =
rotation_matrix(type).begin(nb_degree_of_freedom*nb_nodes_per_element,
nb_degree_of_freedom*nb_nodes_per_element);
for (UInt el = 0; el < nb_element; ++el, ++R_it, ++T_it) {
Matrix<Real> & T = *T_it;
Matrix<Real> & R = *R_it;
T.clear();
for (UInt k = 0; k < nb_nodes_per_element; ++k){
for (UInt i = 0; i < nb_degree_of_freedom; ++i)
for (UInt j = 0; j < nb_degree_of_freedom; ++j)
T(k*nb_degree_of_freedom + i, k*nb_degree_of_freedom + j) = R(i, j);
}
}
}
/* -------------------------------------------------------------------------- */
void StructuralMechanicsModel::computeStresses() {
AKANTU_DEBUG_IN();
Mesh::type_iterator it = getFEEngine().getMesh().firstType(spatial_dimension, _not_ghost, _ek_structural);
Mesh::type_iterator end = getFEEngine().getMesh().lastType(spatial_dimension, _not_ghost, _ek_structural);
for (; it != end; ++it) {
ElementType type = *it;
#define COMPUTE_STRESS_ON_QUAD(type) \
computeStressOnQuad<type>();
AKANTU_BOOST_STRUCTURAL_ELEMENT_SWITCH(COMPUTE_STRESS_ON_QUAD);
#undef COMPUTE_STRESS_ON_QUAD
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void StructuralMechanicsModel::updateResidual() {
AKANTU_DEBUG_IN();
residual->copy(*force_momentum);
Array<Real> ku(*displacement_rotation, true);
ku *= *stiffness_matrix;
*residual -= ku;
this->updateResidualInternal();
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void StructuralMechanicsModel::implicitPred() {
AKANTU_DEBUG_IN();
if(previous_displacement) previous_displacement->copy(*displacement_rotation);
if(method == _implicit_dynamic)
integrator->integrationSchemePred(time_step,
*displacement_rotation,
*velocity,
*acceleration,
*blocked_dofs);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void StructuralMechanicsModel::implicitCorr() {
AKANTU_DEBUG_IN();
Real * incr_val = increment->storage();
bool * boun_val = blocked_dofs->storage();
UInt nb_nodes = displacement_rotation->getSize();
for (UInt j = 0; j < nb_nodes * nb_degree_of_freedom; ++j, ++incr_val, ++boun_val){
*incr_val *= (1. - *boun_val);
}
if(method == _implicit_dynamic) {
integrator->integrationSchemeCorrDispl(time_step,
*displacement_rotation,
*velocity,
*acceleration,
*blocked_dofs,
*increment);
} else {
Real * disp_val = displacement_rotation->storage();
incr_val = increment->storage();
for (UInt j = 0; j < nb_nodes *nb_degree_of_freedom; ++j, ++disp_val, ++incr_val){
*disp_val += *incr_val;
}
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void StructuralMechanicsModel::updateResidualInternal() {
AKANTU_DEBUG_IN();
AKANTU_DEBUG_INFO("Update the residual");
// f = f_ext - f_int - Ma - Cv = r - Ma - Cv;
if(method != _static) {
// f -= Ma
if(mass_matrix) {
// if full mass_matrix
Array<Real> * Ma = new Array<Real>(*acceleration, true, "Ma");
*Ma *= *mass_matrix;
/// \todo check unit conversion for implicit dynamics
// *Ma /= f_m2a
*residual -= *Ma;
delete Ma;
} else if (mass) {
// else lumped mass
UInt nb_nodes = acceleration->getSize();
UInt nb_degree_of_freedom = acceleration->getNbComponent();
Real * mass_val = mass->storage();
Real * accel_val = acceleration->storage();
Real * res_val = residual->storage();
bool * blocked_dofs_val = blocked_dofs->storage();
for (UInt n = 0; n < nb_nodes * nb_degree_of_freedom; ++n) {
if(!(*blocked_dofs_val)) {
*res_val -= *accel_val * *mass_val /f_m2a;
}
blocked_dofs_val++;
res_val++;
mass_val++;
accel_val++;
}
} else {
AKANTU_DEBUG_ERROR("No function called to assemble the mass matrix.");
}
// f -= Cv
if(velocity_damping_matrix) {
Array<Real> * Cv = new Array<Real>(*velocity);
*Cv *= *velocity_damping_matrix;
*residual -= *Cv;
delete Cv;
}
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void StructuralMechanicsModel::setIncrementFlagOn() {
AKANTU_DEBUG_IN();
if(!increment) {
UInt nb_nodes = mesh.getNbNodes();
std::stringstream sstr_inc; sstr_inc << id << ":increment";
increment = &(alloc<Real>(sstr_inc.str(), nb_nodes, spatial_dimension, 0.));
}
increment_flag = true;
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void StructuralMechanicsModel::solve() {
AKANTU_DEBUG_IN();
AKANTU_DEBUG_INFO("Solving an implicit step.");
UInt nb_nodes = displacement_rotation->getSize();
/// todo residual = force - Kxr * d_bloq
jacobian_matrix->copyContent(*stiffness_matrix);
jacobian_matrix->applyBoundary(*blocked_dofs);
jacobian_matrix->saveMatrix("Kbound.mtx");
increment->clear();
solver->setRHS(*residual);
solver->factorize();
solver->solve(*increment);
Real * increment_val = increment->storage();
Real * displacement_val = displacement_rotation->storage();
bool * blocked_dofs_val = blocked_dofs->storage();
for (UInt n = 0; n < nb_nodes * nb_degree_of_freedom; ++n) {
if(!(*blocked_dofs_val)) {
*displacement_val += *increment_val;
}
else {
*increment_val = 0.0;
}
displacement_val++;
blocked_dofs_val++;
increment_val++;
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template<>
bool StructuralMechanicsModel::testConvergence<_scc_increment>(Real tolerance, Real & error){
AKANTU_DEBUG_IN();
UInt nb_nodes = displacement_rotation->getSize();
UInt nb_degree_of_freedom = displacement_rotation->getNbComponent();
error = 0;
Real norm[2] = {0., 0.};
Real * increment_val = increment->storage();
bool * blocked_dofs_val = blocked_dofs->storage();
Real * displacement_val = displacement_rotation->storage();
for (UInt n = 0; n < nb_nodes; ++n) {
for (UInt d = 0; d < nb_degree_of_freedom; ++d) {
if(!(*blocked_dofs_val)) {
norm[0] += *increment_val * *increment_val;
norm[1] += *displacement_val * *displacement_val;
}
blocked_dofs_val++;
increment_val++;
displacement_val++;
}
}
StaticCommunicator::getStaticCommunicator().allReduce(norm, 2, _so_sum);
norm[0] = sqrt(norm[0]);
norm[1] = sqrt(norm[1]);
AKANTU_DEBUG_ASSERT(!Math::isnan(norm[0]), "Something went wrong in the solve phase");
AKANTU_DEBUG_OUT();
if(norm[1] > Math::getTolerance())
error = norm[0] / norm[1];
else
error = norm[0]; //In case the total displacement is zero!
return (error < tolerance);
}
/* -------------------------------------------------------------------------- */
template<>
bool StructuralMechanicsModel::testConvergence<_scc_residual>(Real tolerance, Real & norm) {
AKANTU_DEBUG_IN();
UInt nb_nodes = residual->getSize();
norm = 0;
Real * residual_val = residual->storage();
bool * blocked_dofs_val = blocked_dofs->storage();
for (UInt n = 0; n < nb_nodes; ++n) {
bool is_local_node = mesh.isLocalOrMasterNode(n);
if(is_local_node) {
for (UInt d = 0; d < nb_degree_of_freedom; ++d) {
if(!(*blocked_dofs_val)) {
norm += *residual_val * *residual_val;
}
blocked_dofs_val++;
residual_val++;
}
} else {
blocked_dofs_val += spatial_dimension;
residual_val += spatial_dimension;
}
}
StaticCommunicator::getStaticCommunicator().allReduce(&norm, 1, _so_sum);
norm = sqrt(norm);
AKANTU_DEBUG_ASSERT(!Math::isnan(norm), "Something goes wrong in the solve phase");
AKANTU_DEBUG_OUT();
return (norm < tolerance);
}
/* -------------------------------------------------------------------------- */
bool StructuralMechanicsModel::testConvergenceIncrement(Real tolerance) {
Real error;
bool tmp = testConvergenceIncrement(tolerance, error);
AKANTU_DEBUG_INFO("Norm of increment : " << error);
return tmp;
}
/* -------------------------------------------------------------------------- */
bool StructuralMechanicsModel::testConvergenceIncrement(Real tolerance, Real & error) {
AKANTU_DEBUG_IN();
Mesh & mesh= getFEEngine().getMesh();
UInt nb_nodes = displacement_rotation->getSize();
UInt nb_degree_of_freedom = displacement_rotation->getNbComponent();
Real norm = 0;
Real * increment_val = increment->storage();
bool * blocked_dofs_val = blocked_dofs->storage();
for (UInt n = 0; n < nb_nodes; ++n) {
bool is_local_node = mesh.isLocalOrMasterNode(n);
for (UInt d = 0; d < nb_degree_of_freedom; ++d) {
if(!(*blocked_dofs_val) && is_local_node) {
norm += *increment_val * *increment_val;
}
blocked_dofs_val++;
increment_val++;
}
}
StaticCommunicator::getStaticCommunicator().allReduce(&norm, 1, _so_sum);
error = sqrt(norm);
AKANTU_DEBUG_ASSERT(!Math::isnan(norm), "Something goes wrong in the solve phase");
AKANTU_DEBUG_OUT();
return (error < tolerance);
}
/* -------------------------------------------------------------------------- */
template<>
void StructuralMechanicsModel::computeTangentModuli<_bernoulli_beam_2>(Array<Real> & tangent_moduli) {
UInt nb_element = getFEEngine().getMesh().getNbElement(_bernoulli_beam_2);
UInt nb_quadrature_points = getFEEngine().getNbIntegrationPoints(_bernoulli_beam_2);
UInt tangent_size = 2;
Array<Real>::matrix_iterator D_it = tangent_moduli.begin(tangent_size, tangent_size);
Array<UInt> & el_mat = element_material(_bernoulli_beam_2, _not_ghost);
for (UInt e = 0; e < nb_element; ++e) {
UInt mat = el_mat(e);
Real E = materials[mat].E;
Real A = materials[mat].A;
Real I = materials[mat].I;
for (UInt q = 0; q < nb_quadrature_points; ++q, ++D_it) {
Matrix<Real> & D = *D_it;
D(0,0) = E * A;
D(1,1) = E * I;
}
}
}
/* -------------------------------------------------------------------------- */
template<>
void StructuralMechanicsModel::computeTangentModuli<_bernoulli_beam_3>(Array<Real> & tangent_moduli) {
UInt nb_element = getFEEngine().getMesh().getNbElement(_bernoulli_beam_3);
UInt nb_quadrature_points = getFEEngine().getNbIntegrationPoints(_bernoulli_beam_3);
UInt tangent_size = 4;
Array<Real>::matrix_iterator D_it = tangent_moduli.begin(tangent_size, tangent_size);
for (UInt e = 0; e < nb_element; ++e) {
UInt mat = element_material(_bernoulli_beam_3, _not_ghost)(e);
Real E = materials[mat].E;
Real A = materials[mat].A;
Real Iz = materials[mat].Iz;
Real Iy = materials[mat].Iy;
Real GJ = materials[mat].GJ;
for (UInt q = 0; q < nb_quadrature_points; ++q, ++D_it) {
Matrix<Real> & D = *D_it;
D(0,0) = E * A;
D(1,1) = E * Iz;
D(2,2) = E * Iy;
D(3,3) = GJ;
}
}
}
/* -------------------------------------------------------------------------- */
template<>
void StructuralMechanicsModel::computeTangentModuli<_kirchhoff_shell>(Array<Real> & tangent_moduli) {
UInt nb_element = getFEEngine().getMesh().getNbElement(_kirchhoff_shell);
UInt nb_quadrature_points = getFEEngine().getNbIntegrationPoints(_kirchhoff_shell);
UInt tangent_size = 6;
Array<Real>::matrix_iterator D_it = tangent_moduli.begin(tangent_size, tangent_size);
for (UInt e = 0; e < nb_element; ++e) {
UInt mat = element_material(_kirchhoff_shell, _not_ghost)(e);
Real E = materials[mat].E;
Real nu = materials[mat].nu;
Real t = materials[mat].t;
Real HH=E*t/(1-nu*nu);
Real DD=E*t*t*t/(12*(1-nu*nu));
for (UInt q = 0; q < nb_quadrature_points; ++q, ++D_it) {
Matrix<Real> & D = *D_it;
D(0,0) = HH;
D(0,1) = HH*nu;
D(1,0) = HH*nu;
D(1,1) = HH;
D(2,2) = HH*(1-nu)/2;
D(3,3) = DD;
D(3,4) = DD*nu;
D(4,3) = DD*nu;
D(4,4) = DD;
D(5,5) = DD*(1-nu)/2;
}
}
}
/* -------------------------------------------------------------------------- */
template<>
void StructuralMechanicsModel::transferBMatrixToSymVoigtBMatrix<_bernoulli_beam_2>(Array<Real> & b, bool local) {
UInt nb_element = getFEEngine().getMesh().getNbElement(_bernoulli_beam_2);
UInt nb_nodes_per_element = Mesh::getNbNodesPerElement(_bernoulli_beam_2);
UInt nb_quadrature_points = getFEEngine().getNbIntegrationPoints(_bernoulli_beam_2);
MyFEEngineType & fem = getFEEngineClass<MyFEEngineType>();
Array<Real>::const_vector_iterator shape_Np = fem.getShapesDerivatives(_bernoulli_beam_2, _not_ghost, 0).begin(nb_nodes_per_element);
Array<Real>::const_vector_iterator shape_Mpp = fem.getShapesDerivatives(_bernoulli_beam_2, _not_ghost, 1).begin(nb_nodes_per_element);
Array<Real>::const_vector_iterator shape_Lpp = fem.getShapesDerivatives(_bernoulli_beam_2, _not_ghost, 2).begin(nb_nodes_per_element);
UInt tangent_size = getTangentStiffnessVoigtSize<_bernoulli_beam_2>();
UInt bt_d_b_size = nb_nodes_per_element * nb_degree_of_freedom;
b.clear();
Array<Real>::matrix_iterator B_it = b.begin(tangent_size, bt_d_b_size);
for (UInt e = 0; e < nb_element; ++e) {
for (UInt q = 0; q < nb_quadrature_points; ++q) {
Matrix<Real> & B = *B_it;
const Vector<Real> & Np = *shape_Np;
const Vector<Real> & Lpp = *shape_Lpp;
const Vector<Real> & Mpp = *shape_Mpp;
B(0,0) = Np(0);
B(0,3) = Np(1);
B(1,1) = Mpp(0);
B(1,2) = Lpp(0);
B(1,4) = Mpp(1);
B(1,5) = Lpp(1);
++B_it;
++shape_Np;
++shape_Mpp;
++shape_Lpp;
}
// ++R_it;
}
}
/* -------------------------------------------------------------------------- */
template<>
void StructuralMechanicsModel::transferBMatrixToSymVoigtBMatrix<_bernoulli_beam_3>(Array<Real> & b, bool local) {
MyFEEngineType & fem = getFEEngineClass<MyFEEngineType>();
UInt nb_element = getFEEngine().getMesh().getNbElement(_bernoulli_beam_3);
UInt nb_nodes_per_element = Mesh::getNbNodesPerElement(_bernoulli_beam_3);
UInt nb_quadrature_points = getFEEngine().getNbIntegrationPoints(_bernoulli_beam_3);
Array<Real>::const_vector_iterator shape_Np = fem.getShapesDerivatives(_bernoulli_beam_3, _not_ghost, 0).begin(nb_nodes_per_element);
Array<Real>::const_vector_iterator shape_Mpp = fem.getShapesDerivatives(_bernoulli_beam_3, _not_ghost, 1).begin(nb_nodes_per_element);
Array<Real>::const_vector_iterator shape_Lpp = fem.getShapesDerivatives(_bernoulli_beam_3, _not_ghost, 2).begin(nb_nodes_per_element);
UInt tangent_size = getTangentStiffnessVoigtSize<_bernoulli_beam_3>();
UInt bt_d_b_size = nb_nodes_per_element * nb_degree_of_freedom;
b.clear();
Array<Real>::matrix_iterator B_it = b.begin(tangent_size, bt_d_b_size);
for (UInt e = 0; e < nb_element; ++e) {
for (UInt q = 0; q < nb_quadrature_points; ++q) {
Matrix<Real> & B = *B_it;
const Vector<Real> & Np = *shape_Np;
const Vector<Real> & Lpp = *shape_Lpp;
const Vector<Real> & Mpp = *shape_Mpp;
B(0,0) = Np(0);
B(0,6) = Np(1);
B(1,1) = Mpp(0);
B(1,5) = Lpp(0);
B(1,7) = Mpp(1);
B(1,11) = Lpp(1);
B(2,2) = Mpp(0);
B(2,4) = -Lpp(0);
B(2,8) = Mpp(1);
B(2,10) = -Lpp(1);
B(3,3) = Np(0);
B(3,9) = Np(1);
++B_it;
++shape_Np;
++shape_Mpp;
++shape_Lpp;
}
}
}
/* -------------------------------------------------------------------------- */
template<>
void StructuralMechanicsModel::transferBMatrixToSymVoigtBMatrix<_kirchhoff_shell>(Array<Real> & b, bool local) {
MyFEEngineType & fem = getFEEngineClass<MyFEEngineType>();
UInt nb_element = getFEEngine().getMesh().getNbElement(_kirchhoff_shell);
UInt nb_nodes_per_element = Mesh::getNbNodesPerElement(_kirchhoff_shell);
UInt nb_quadrature_points = getFEEngine().getNbIntegrationPoints(_kirchhoff_shell);
Array<Real>::const_matrix_iterator shape_Np = fem.getShapesDerivatives(_kirchhoff_shell, _not_ghost, 0).begin(2,nb_nodes_per_element);
Array<Real>::const_matrix_iterator shape_Nx1p = fem.getShapesDerivatives(_kirchhoff_shell, _not_ghost, 1).begin(2,nb_nodes_per_element);
Array<Real>::const_matrix_iterator shape_Nx2p = fem.getShapesDerivatives(_kirchhoff_shell, _not_ghost, 2).begin(2,nb_nodes_per_element);
Array<Real>::const_matrix_iterator shape_Nx3p = fem.getShapesDerivatives(_kirchhoff_shell, _not_ghost, 3).begin(2,nb_nodes_per_element);
Array<Real>::const_matrix_iterator shape_Ny1p = fem.getShapesDerivatives(_kirchhoff_shell, _not_ghost, 4).begin(2,nb_nodes_per_element);
Array<Real>::const_matrix_iterator shape_Ny2p = fem.getShapesDerivatives(_kirchhoff_shell, _not_ghost, 5).begin(2,nb_nodes_per_element);
Array<Real>::const_matrix_iterator shape_Ny3p = fem.getShapesDerivatives(_kirchhoff_shell, _not_ghost, 6).begin(2,nb_nodes_per_element);
UInt tangent_size = getTangentStiffnessVoigtSize<_kirchhoff_shell>();
UInt bt_d_b_size = nb_nodes_per_element * nb_degree_of_freedom;
b.clear();
Array<Real>::matrix_iterator B_it = b.begin(tangent_size, bt_d_b_size);
for (UInt e = 0; e < nb_element; ++e) {
for (UInt q = 0; q < nb_quadrature_points; ++q) {
Matrix<Real> & B = *B_it;
const Matrix<Real> & Np = *shape_Np;
const Matrix<Real> & Nx1p = *shape_Nx1p;
const Matrix<Real> & Nx2p = *shape_Nx2p;
const Matrix<Real> & Nx3p = *shape_Nx3p;
const Matrix<Real> & Ny1p = *shape_Ny1p;
const Matrix<Real> & Ny2p = *shape_Ny2p;
const Matrix<Real> & Ny3p = *shape_Ny3p;
B(0,0) = Np(0,0);
B(0,6) = Np(0,1);
B(0,12) = Np(0,2);
B(1,1) = Np(1,0);
B(1,7) = Np(1,1);
B(1,13) = Np(1,2);
B(2,0) = Np(1,0);
B(2,1) = Np(0,0);
B(2,6) = Np(1,1);
B(2,7) = Np(0,1);
B(2,12) = Np(1,2);
B(2,13) = Np(0,2);
B(3,2) = Nx1p(0,0);
B(3,3) = Nx2p(0,0);
B(3,4) = Nx3p(0,0);
B(3,8) = Nx1p(0,1);
B(3,9) = Nx2p(0,1);
B(3,10) = Nx3p(0,1);
B(3,14) = Nx1p(0,2);
B(3,15) = Nx2p(0,2);
B(3,16) = Nx3p(0,2);
B(4,2) = Ny1p(1,0);
B(4,3) = Ny2p(1,0);
B(4,4) = Ny3p(1,0);
B(4,8) = Ny1p(1,1);
B(4,9) = Ny2p(1,1);
B(4,10) = Ny3p(1,1);
B(4,14) = Ny1p(1,2);
B(4,15) = Ny2p(1,2);
B(4,16) = Ny3p(1,2);
B(5,2) = Nx1p(1,0) + Ny1p(0,0);
B(5,3) = Nx2p(1,0) + Ny2p(0,0);
B(5,4) = Nx3p(1,0) + Ny3p(0,0);
B(5,8) = Nx1p(1,1) + Ny1p(0,1);
B(5,9) = Nx2p(1,1) + Ny2p(0,1);
B(5,10) = Nx3p(1,1) + Ny3p(0,1);
B(5,14) = Nx1p(1,2) + Ny1p(0,2);
B(5,15) = Nx2p(1,2) + Ny2p(0,2);
B(5,16) = Nx3p(1,2) + Ny3p(0,2);
++B_it;
++shape_Np;
++shape_Nx1p;
++shape_Nx2p;
++shape_Nx3p;
++shape_Ny1p;
++shape_Ny2p;
++shape_Ny3p;
}
}
}
/* -------------------------------------------------------------------------- */
dumper::Field * StructuralMechanicsModel
::createNodalFieldBool(const std::string & field_name,
const std::string & group_name,
bool padding_flag) {
std::map<std::string,Array<bool>* > uint_nodal_fields;
uint_nodal_fields["blocked_dofs" ] = blocked_dofs;
dumper::Field * field = NULL;
field = mesh.createNodalField(uint_nodal_fields[field_name],group_name);
return field;
}
/* -------------------------------------------------------------------------- */
dumper::Field * StructuralMechanicsModel
::createNodalFieldReal(const std::string & field_name,
const std::string & group_name,
bool padding_flag) {
UInt n;
if(spatial_dimension == 2) {
n = 2;
} else n = 3;
dumper::Field * field = NULL;
if (field_name == "displacement"){
field = mesh.createStridedNodalField(displacement_rotation,group_name,n,0,padding_flag);
}
if (field_name == "rotation"){
field = mesh.createStridedNodalField(displacement_rotation,group_name,
nb_degree_of_freedom-n,n,padding_flag);
}
if (field_name == "force"){
field = mesh.createStridedNodalField(force_momentum,group_name,n,0,padding_flag);
}
if (field_name == "momentum"){
field = mesh.createStridedNodalField(force_momentum,group_name,
nb_degree_of_freedom-n,n,padding_flag);
}
if (field_name == "residual"){
field = mesh.createNodalField(residual,group_name,padding_flag);
}
return field;
}
/* -------------------------------------------------------------------------- */
dumper::Field * StructuralMechanicsModel
::createElementalField(const std::string & field_name,
const std::string & group_name,
bool padding_flag,
const ElementKind & kind,
const std::string & fe_engine_id){
dumper::Field * field = NULL;
if(field_name == "element_index_by_material")
field = mesh.createElementalField<UInt, Vector, dumper::ElementalField >(field_name,group_name,this->spatial_dimension,kind);
return field;
}
/* -------------------------------------------------------------------------- */
__END_AKANTU__

Event Timeline

c4science · Help