pseudo_arclength_continuation_solver.h

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/*
 * MAST: Multidisciplinary-design Adaptation and Sensitivity Toolkit
 * Copyright (C) 2013-2019  Manav Bhatia
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef __mast__pseudo_arclength_continuation_solver_h__
#define __mast__pseudo_arclength_continuation_solver_h__

// MAST includes
#include "solver/continuation_solver_base.h"


namespace MAST {
    
    class PseudoArclengthContinuationSolver:
    public MAST::ContinuationSolverBase {
        
    public:
        
        PseudoArclengthContinuationSolver();
        
        virtual ~PseudoArclengthContinuationSolver();
        
        virtual void initialize(Real dp);
        
        
    protected:
        
        virtual void
        _solve_NR_iterate(libMesh::NumericVector<Real>       &X,
                          MAST::Parameter                    &p);
        
        void
        _update_search_direction(const libMesh::NumericVector<Real> &X,
                                 const MAST::Parameter              &p,
                                 libMesh::SparseMatrix<Real>        &jac,
                                 /*libMesh::NumericVector<Real>       &dfdp,
                                 libMesh::NumericVector<Real>       &dXdp,*/
                                 libMesh::NumericVector<Real>       &t1_X,
                                 Real                               &t1_p);
        
        
        virtual Real
        _g(const libMesh::NumericVector<Real> &X,
           const MAST::Parameter              &p);
        
        
        void
        _g(const libMesh::NumericVector<Real> &X,
           const MAST::Parameter              &p,
           libMesh::NumericVector<Real>       &t1_X,
           Real                               &t1_p,
           Real                               &g);

        virtual void _save_iteration_data();

        virtual void _reset_iterations();

        std::unique_ptr<libMesh::NumericVector<Real>>  _t0_X, _t0_X_orig;
        Real                                           _t0_p, _t0_p_orig;
    };
}


#endif // __mast__pseudo_arclength_continuation_solver_h__