arclength_continuation_solver.h

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/*
 * MAST: Multidisciplinary-design Adaptation and Sensitivity Toolkit
 * Copyright (C) 2013-2020  Manav Bhatia and MAST authors
 *
 * 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__arclength_continuation_solver_h__
#define __mast__arclength_continuation_solver_h__

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


namespace MAST {
    
    class ArclengthContinuationSolver:
    public MAST::ContinuationSolverBase {
        
    public:
        
        ArclengthContinuationSolver();
        
        virtual ~ArclengthContinuationSolver();
        
        virtual void initialize(Real dp);

    protected:
        
        virtual void
        _solve_NR_iterate(libMesh::NumericVector<Real>       &X,
                          MAST::Parameter                    &p);
        
        virtual void
        _dXdp(const libMesh::NumericVector<Real> &X,
              const MAST::Parameter              &p,
              libMesh::NumericVector<Real>       &dfdp,
              libMesh::NumericVector<Real>       &dXdp);
        
        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>       &dfdp,
           libMesh::NumericVector<Real>       &dXdp,
           Real                               &g,
           Real                               &dgdp,
           libMesh::NumericVector<Real>       *dgdX);
        
        virtual void _save_iteration_data() {}

        virtual void _reset_iterations() {}

        Real
        _dpds_sign;
    };
}

#endif // __mast__arclength_continuation_solver_h__