sparsenonlinsystemnm.h

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/*
 *
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 *
 *
 *             OOFEM : Object Oriented Finite Element Code
 *
 *               Copyright (C) 1993 - 2025   Borek Patzak
 *
 *
 *
 *       Czech Technical University, Faculty of Civil Engineering,
 *   Department of Structural Mechanics, 166 29 Prague, Czech Republic
 *
 *  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 program 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
 */
 
 
//   *************************************
//   *** CLASS SparseNonLinearSystemNM ***
//   *************************************
 
 
#ifndef sparsenonlinsystemnm_h
#define sparsenonlinsystemnm_h
 
#include "nummet.h"
#include "convergedreason.h"
#include "floatarray.h"
#include "intarray.h"


#define _IFT_NonLinearStatic_randPertAmplitude "rpa"
#define _IFT_NonLinearStatic_randSeed "rseed"
#define _IFT_NonLinearStatic_pert "pert"
#define _IFT_NonLinearStatic_pertw "pertw"
 
namespace oofem {
class EngngModel;
class SparseMtrx;
class FloatArray;
class TimeStep;
class SparseLinearSystemNM;

class OOFEM_EXPORT SparseNonLinearSystemNM : public NumericalMethod
{
protected:
    double deltaL=0.0;

    double randPertAmplitude=0.0;
    int randSeed=0;
    bool pert_init_needed;
    IntArray igp_PertDmanDofSrcArray;
    FloatArray igp_PertWeightArray;
    IntArray igp_Map;
    FloatArray igp_Weight;
public:
    enum referenceLoadInputModeType {
        rlm_total=0, 
        rlm_incremental=1, 
    };

    SparseNonLinearSystemNM(Domain * d, EngngModel * m) : NumericalMethod(d, m), igp_PertDmanDofSrcArray(), igp_PertWeightArray(), igp_Map(), igp_Weight() { pert_init_needed = false; }
    virtual ~SparseNonLinearSystemNM() { }

    virtual ConvergedReason solve(SparseMtrx &K, FloatArray &R, FloatArray *R0,
                            FloatArray &X, FloatArray &dX, FloatArray &F,
                            const FloatArray &internalForcesEBENorm, double &s, referenceLoadInputModeType rlm,
                            int &nite, TimeStep *tStep) = 0;

    virtual double giveCurrentStepLength() { return this->deltaL; }
    virtual void setStepLength(double s) { this->deltaL = s; }
    virtual bool referenceLoad() const { return false; }
    virtual void printState(FILE *outputStream) { }

    virtual SparseLinearSystemNM *giveLinearSolver() { return nullptr; }
 
    void initializeFrom(InputRecord &ir) override;
    virtual void convertPertMap();
    virtual void applyPerturbation(FloatArray* displacement);
 
    virtual const char *giveClassName() const { return "SparseNonLinearSystemNM"; }
    std :: string errorInfo(const char *func) const { return std :: string(giveClassName()) + "::" + func; }
};
} // end namespace oofem
#endif // sparsenonlinsystemnm_h