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rAKA/src/model/model_solver.cc
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model_solver.cc
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/**
* @file model_solver.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date Wed Aug 12 13:31:56 2015
*
* @brief Implementation of ModelSolver
*
* @section LICENSE
*
* Copyright (©) 2010-2011 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 "model_solver.hh"
#include "dof_manager.hh"
#if defined(AKANTU_USE_MUMPS)
#include "dof_manager_default.hh"
#endif
#if defined(AKANTU_USE_PETSC)
#include "dof_manager_petsc.hh"
#endif
/* -------------------------------------------------------------------------- */
__BEGIN_AKANTU__
ModelSolver::ModelSolver(const Mesh & mesh, const ID & id)
: Parsable(_st_solver, id), dof_manager(NULL) {
std::pair<Parser::const_section_iterator, Parser::const_section_iterator>
sub_sect = getStaticParser().getSubSections(_st_solver);
if (sub_sect.first != sub_sect.second) {
AKANTU_EXCEPTION("More than on solver section present in the input file");
}
const ParserSection & section = *sub_sect.first;
std::string solver_type = section.getName();
if (solver_type == "petsc") {
#if defined(AKANTU_USE_PETSC)
this->dof_manager = new DOFManagerPETSc(mesh, id + ":dof_manager_petsc");
#else
AKANTU_EXCEPTION(
"To use PETSc you have to activate it in the compilations options");
#endif
} else if (solver_type == "mumps") {
#if defined(AKANTU_USE_MUMPS)
this->dof_manager = new DOFManagerDefault(mesh, id + ":dof_manager_default");
#else
AKANTU_EXCEPTION(
"To use MUMPS you have to activate it in the compilations options");
#endif
} else {
AKANTU_EXCEPTION(
"To use the solver "
<< solver_type
<< " you will have to code it. This is an unknown solver type.");
}
}
/* -------------------------------------------------------------------------- */
// /* -------------------------------------------------------------------------- */
// template <NewmarkBeta::IntegrationSchemeCorrectorType type>
// void SolidMechanicsModel::solve(Array<Real> &increment, Real block_val,
// bool need_factorize, bool has_profile_changed) {
// if(has_profile_changed) {
// this->initJacobianMatrix();
// need_factorize = true;
// }
// updateResidualInternal(); //doesn't do anything for static
// if(need_factorize) {
// Real c = 0.,d = 0.,e = 0.;
// if(method == _static) {
// AKANTU_DEBUG_INFO("Solving K inc = r");
// e = 1.;
// } else {
// AKANTU_DEBUG_INFO("Solving (c M + d C + e K) inc = r");
// NewmarkBeta * nmb_int = dynamic_cast<NewmarkBeta *>(integrator);
// c = nmb_int->getAccelerationCoefficient<type>(time_step);
// d = nmb_int->getVelocityCoefficient<type>(time_step);
// e = nmb_int->getDisplacementCoefficient<type>(time_step);
// }
// jacobian_matrix->clear();
// // J = c M + d C + e K
// if(stiffness_matrix)
// jacobian_matrix->add(*stiffness_matrix, e);
// if(mass_matrix)
// jacobian_matrix->add(*mass_matrix, c);
// #if !defined(AKANTU_NDEBUG)
// if(mass_matrix && AKANTU_DEBUG_TEST(dblDump))
// mass_matrix->saveMatrix("M.mtx");
// #endif
// if(velocity_damping_matrix)
// jacobian_matrix->add(*velocity_damping_matrix, d);
// jacobian_matrix->applyBoundary(*blocked_dofs, block_val);
// #if !defined(AKANTU_NDEBUG)
// if(AKANTU_DEBUG_TEST(dblDump))
// jacobian_matrix->saveMatrix("J.mtx");
// #endif
// solver->factorize();
// }
// // if (rhs.getSize() != 0)
// // solver->setRHS(rhs);
// // else
// solver->setOperators();
// solver->setRHS(*residual);
// // solve @f[ J \delta w = r @f]
// solver->solve(increment);
// UInt nb_nodes = displacement-> getSize();
// UInt nb_degree_of_freedom = displacement->getNbComponent() * nb_nodes;
// bool * blocked_dofs_val = blocked_dofs->storage();
// Real * increment_val = increment.storage();
// for (UInt j = 0; j < nb_degree_of_freedom;
// ++j,++increment_val, ++blocked_dofs_val) {
// if ((*blocked_dofs_val))
// *increment_val = 0.0;
// }
// }
// /* -------------------------------------------------------------------------- */
// template<SolveConvergenceMethod cmethod, SolveConvergenceCriteria criteria>
// bool SolidMechanicsModel::solveStatic(Real tolerance, UInt max_iteration,
// bool do_not_factorize) {
// AKANTU_DEBUG_INFO("Solving Ku = f");
// AKANTU_DEBUG_ASSERT(stiffness_matrix != NULL,
// "You should first initialize the implicit solver and assemble the stiffness matrix by calling initImplicit");
// AnalysisMethod analysis_method=method;
// Real error = 0.;
// method=_static;
// bool converged = this->template solveStep<cmethod, criteria>(tolerance, error, max_iteration, do_not_factorize);
// method=analysis_method;
// return converged;
// }
// /* -------------------------------------------------------------------------- */
// template<SolveConvergenceMethod cmethod, SolveConvergenceCriteria criteria>
// bool SolidMechanicsModel::solveStep(Real tolerance,
// UInt max_iteration) {
// Real error = 0.;
// return this->template solveStep<cmethod,criteria>(tolerance,
// error,
// max_iteration);
// }
// /* -------------------------------------------------------------------------- */
// template<SolveConvergenceMethod cmethod, SolveConvergenceCriteria criteria>
// bool SolidMechanicsModel::solveStep(Real tolerance, Real & error, UInt max_iteration,
// bool do_not_factorize) {
// EventManager::sendEvent(SolidMechanicsModelEvent::BeforeSolveStepEvent(method));
// this->implicitPred();
// this->updateResidual();
// AKANTU_DEBUG_ASSERT(stiffness_matrix != NULL,
// "You should first initialize the implicit solver and assemble the stiffness matrix");
// bool need_factorize = !do_not_factorize;
// if (method==_implicit_dynamic) {
// AKANTU_DEBUG_ASSERT(mass_matrix != NULL,
// "You should first initialize the implicit solver and assemble the mass matrix");
// }
// switch (cmethod) {
// case _scm_newton_raphson_tangent:
// case _scm_newton_raphson_tangent_not_computed:
// break;
// case _scm_newton_raphson_tangent_modified:
// this->assembleStiffnessMatrix();
// break;
// default:
// AKANTU_DEBUG_ERROR("The resolution method " << cmethod << " has not been implemented!");
// }
// this->n_iter = 0;
// bool converged = false;
// error = 0.;
// if(criteria == _scc_residual) {
// converged = this->testConvergence<criteria> (tolerance, error);
// if(converged) return converged;
// }
// do {
// if (cmethod == _scm_newton_raphson_tangent)
// this->assembleStiffnessMatrix();
// solve<NewmarkBeta::_displacement_corrector> (*increment, 1., need_factorize);
// this->implicitCorr();
// if(criteria == _scc_residual) this->updateResidual();
// converged = this->testConvergence<criteria> (tolerance, error);
// if(criteria == _scc_increment && !converged) this->updateResidual();
// //this->dump();
// this->n_iter++;
// AKANTU_DEBUG_INFO("[" << criteria << "] Convergence iteration "
// << std::setw(std::log10(max_iteration)) << this->n_iter
// << ": error " << error << (converged ? " < " : " > ") << tolerance);
// switch (cmethod) {
// case _scm_newton_raphson_tangent:
// need_factorize = true;
// break;
// case _scm_newton_raphson_tangent_not_computed:
// case _scm_newton_raphson_tangent_modified:
// need_factorize = false;
// break;
// default:
// AKANTU_DEBUG_ERROR("The resolution method " << cmethod << " has not been implemented!");
// }
// } while (!converged && this->n_iter < max_iteration);
// // this makes sure that you have correct strains and stresses after the solveStep function (e.g., for dumping)
// if(criteria == _scc_increment) this->updateResidual();
// if (converged) {
// EventManager::sendEvent(SolidMechanicsModelEvent::AfterSolveStepEvent(method));
// } else if(this->n_iter == max_iteration) {
// AKANTU_DEBUG_WARNING("[" << criteria << "] Convergence not reached after "
// << std::setw(std::log10(max_iteration)) << this->n_iter <<
// " iteration" << (this->n_iter == 1 ? "" : "s") << "!" << std::endl);
// }
// return converged;
// }
// void SolidMechanicsModel::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 SolidMechanicsModel::solveLumped(Array<Real> & x,
// const Array<Real> & A,
// const Array<Real> & b,
// const Array<bool> & blocked_dofs,
// Real alpha) {
// Real * A_val = A.storage();
// Real * b_val = b.storage();
// Real * x_val = x.storage();
// bool * blocked_dofs_val = blocked_dofs.storage();
// UInt nb_degrees_of_freedom = x.getSize() * x.getNbComponent();
// for (UInt n = 0; n < nb_degrees_of_freedom; ++n) {
// if(!(*blocked_dofs_val)) {
// *x_val = alpha * (*b_val / *A_val);
// }
// x_val++;
// A_val++;
// b_val++;
// blocked_dofs_val++;
// }
// }
__END_AKANTU__
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