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Fri, Nov 8, 02:42

bem_uzawa.hh
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/**
*
* @author Valentine Rey <valentine.rey@epfl.ch>
*
* @section LICENSE
*
* Copyright (©) 2016 EPFL (Ecole Polytechnique Fédérale de
* Lausanne) Laboratory (LSMS - Laboratoire de Simulation en Mécanique des
* Solides)
*
* Tamaas 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.
*
* Tamaas 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 Tamaas. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef BEM_UZAWA_H
#define BEM_UZAWA_H
/* -------------------------------------------------------------------------- */
#include "bem_fft_base.hh"
/* -------------------------------------------------------------------------- */
namespace tamaas {
class BemUzawa : public BemFFTBase {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
BemUzawa(Surface<Real>& p)
: BemFFTBase(p), search_direction(p.size(), p.getL()),
multipliers(p.size(), p.getL()), surface_r(p.size(), p.getL()),
mean_disp_search_direction(p.size(), p.getL()) {
e_star = 1.;
max_iterations = 10000;
};
virtual ~BemUzawa(){};
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
//! compute the equilibrium situation
Real computeEquilibrium(Real epsilon, Real pressure,
Real penalization_parameter);
void computeSearchDirection(Real mean_displacement,
Real penalization_parameter);
void updateMultipliers(Real penalization_parameter);
Real updatePenalization(Real penalization_parameter, Real old_pen,
Real new_pen);
Real computeInterpenetration(Surface<Real>& displacements);
void updateUnknown(Real tau, Real mean_displacement);
Real computeStoppingCriterion();
void computePressures();
Real computeOptimalStep();
virtual void computeTractionsFromDisplacements();
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
//! get the number of iterations
UInt getNbIterations() const { return this->nb_iterations; };
//! get the convergence steps of iterations
const std::vector<Real>& getConvergenceIterations() const {
return this->convergence_iterations;
};
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
//! exploration direction for the Gigi algo
Surface<Real> search_direction;
//! exploration direction for the polonski algo
Surface<Real> multipliers;
//! projected exploration direction for the polonski algo
Surface<Real> surface_r;
//! exploration direction for optimization of mean displacement
Surface<Real> mean_disp_search_direction;
};
} // namespace tamaas
#endif /* BEM_Uzawa_H */

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