nlinearstatic.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
 */
 
#ifndef nlinearstatic_h
#define nlinearstatic_h
 
#include "sm/EngineeringModels/linearstatic.h"
#include "sparsenonlinsystemnm.h"
#include "function.h"


#define _IFT_NonLinearStatic_Name "nonlinearstatic"
#define _IFT_NonLinearStatic_controlmode "controlmode"
#define _IFT_NonLinearStatic_deltat "deltat"
#define _IFT_NonLinearStatic_deltatfunction "deltatfunction"
#define _IFT_NonLinearStatic_stiffmode "stiffmode"
#define _IFT_NonLinearStatic_refloadmode "refloadmode"
#define _IFT_NonLinearStatic_keepll "keepll"
#define _IFT_NonLinearStatic_donotfixload "donotfixload"
#define _IFT_NonLinearStatic_nonlocstiff "nonlocstiff"
#define _IFT_NonLinearStatic_nonlocalext "nonlocalext"
#define _IFT_NonLinearStatic_loadBalancingFlag "loadbalancingflag"
#define _IFT_NonLinearStatic_forceloadBalancingFlag "forceloadbalancingflag"
#define _IFT_NonLinearStatic_updateElasticStiffnessFlag "updateelasticstiffnessflag"
 
namespace oofem {
enum NonLinearStatic_stiffnessMode {
    nls_tangentStiffness = 0, 
    nls_secantStiffness = 1, 
    nls_elasticStiffness = 2, 
    nls_secantInitialStiffness = 3, 
};

enum NonLinearStatic_controlType {
    nls_indirectControl = 0, 
    nls_directControl = 1,   
};

class NonLinearStatic : public LinearStatic
{
protected:
    double prevStepLength, currentStepLength;
    FloatArray totalDisplacement,  incrementOfDisplacement;
    FloatArray internalForces;

    FloatArray initialLoadVector;
    FloatArray incrementalLoadVector;
    FloatArray initialLoadVectorOfPrescribed;
    FloatArray incrementalLoadVectorOfPrescribed;
 
    double loadLevel, cumulatedLoadLevel;
    bool mstepCumulateLoadLevelFlag;
    int currentIterations;
    NonLinearStatic_stiffnessMode stiffMode;
    int loadInitFlag;
    int nonlocalStiffnessFlag;
    bool updateElasticStiffnessFlag;
    ConvergedReason numMetStatus;
    SparseNonLinearSystemNM *nMethod;
    NonLinearStatic_controlType controlMode;
    double deltaT;
    int dtFunction;

    SparseNonLinearSystemNM :: referenceLoadInputModeType refLoadInputMode;

    InitialGuess initialGuessType;
 
public:
    NonLinearStatic(int i, EngngModel *master = nullptr);
    virtual ~NonLinearStatic();
 
    Function *giveDtFunction();
    double giveDeltaT(int n);
    void solveYourself() override;
    void solveYourselfAt(TimeStep *tStep) override;
    void terminate(TimeStep *tStep) override;
 
    void printOutputAt(FILE *file, TimeStep *tStep) override;
 
    void updateComponent(TimeStep *tStep, NumericalCmpn, Domain *d) override;
    void updateSolution(FloatArray &solutionVector, TimeStep *tStep, Domain *d) override;
    void updateMatrix(SparseMtrx &mat, TimeStep *tStep, Domain *d) override;
    void updateAttributes(MetaStep *mStep) override;
 
    double giveUnknownComponent(ValueModeType type, TimeStep *tStep, Domain *d, Dof *dof) override;
    void initializeFrom(InputRecord &ir) override;
    TimeStep *giveSolutionStepWhenIcApply(bool force = false) override;
    NumericalMethod *giveNumericalMethod(MetaStep *mStep) override;
    TimeStep *giveNextStep() override;
    double giveLoadLevel() override { return cumulatedLoadLevel + loadLevel; }
 
    void saveContext(DataStream &stream, ContextMode mode) override;
    void restoreContext(DataStream &stream, ContextMode mode) override;
 
    void updateDomainLinks() override;
 
    // identification
    const char *giveClassName() const override { return "NonLinearStatic"; }
    fMode giveFormulation() override { return nonLinFormulation; }
    int useNonlocalStiffnessOption() override { return this->nonlocalStiffnessFlag; }
    int giveUnknownDictHashIndx(ValueModeType mode, TimeStep *tStep) override { return ( int ) mode; }
    int giveCurrentNumberOfIterations() override { return currentIterations; }
 
#ifdef __OOFEG
    void showSparseMtrxStructure(int type, oofegGraphicContext &gc, TimeStep *tStep) override;
#endif
 
    int estimateMaxPackSize(IntArray &commMap, DataStream &buff, int packUnpackType) override;
#ifdef __MPI_PARALLEL_MODE
    LoadBalancer *giveLoadBalancer() override;
    LoadBalancerMonitor *giveLoadBalancerMonitor() override;
 
#endif
 
protected:
    void assemble(SparseMtrx &answer, TimeStep *tStep, const MatrixAssembler &ma,
                  const UnknownNumberingScheme &, Domain *domain) override;
    void proceedStep(int di, TimeStep *tStep);
    virtual void updateLoadVectors(TimeStep *tStep);
    void computeExternalLoadReactionContribution(FloatArray &reactions, TimeStep *tStep, int di) override;
    void assembleIncrementalReferenceLoadVectors(FloatArray &_incrementalLoadVector,
                                                 FloatArray &_incrementalLoadVectorOfPrescribed,
                                                 SparseNonLinearSystemNM :: referenceLoadInputModeType _refMode,
                                                 Domain *sourceDomain, TimeStep *tStep);
 
    void packMigratingData(TimeStep *tStep) override;
    void unpackMigratingData(TimeStep *tStep) override;
    double giveInitialTime() override {return 1;}
 
};
} // end namespace oofem
#endif // nlinearstatic_h