linearstability.h

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/*
 *
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 *
 *
 *             OOFEM : Object Oriented Finite Element Code
 *
 *               Copyright (C) 1993 - 2013   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 linearstability_h
#define linearstability_h

#include "../sm/EngineeringModels/structengngmodel.h"
#include "geneigvalsolvertype.h"
#include "sparsegeneigenvalsystemnm.h"
#include "sparselinsystemnm.h"
#include "sparsemtrx.h"
#include "floatmatrix.h"
#include "floatarray.h"
#include "nummet.h"


#define _IFT_LinearStability_Name "linearstability"
#define _IFT_LinearStability_nroot "nroot"
#define _IFT_LinearStability_rtolv "rtolv"
#define _IFT_LinearStability_stype "stype"


namespace oofem {
class LinearStability : public StructuralEngngModel
{
private:
    std :: unique_ptr< SparseMtrx > stiffnessMatrix;
    std :: unique_ptr< SparseMtrx > initialStressMatrix;
    FloatArray loadVector;
    FloatArray displacementVector;
    FloatMatrix eigVec;
    FloatArray eigVal;
    int numberOfRequiredEigenValues;
    double rtolv;
    GenEigvalSolverType solverType;
    std :: unique_ptr< SparseGeneralEigenValueSystemNM > nMethod;
    std :: unique_ptr< SparseLinearSystemNM > nMethodLS;

public:
    LinearStability(int i, EngngModel * _master = NULL) : StructuralEngngModel(i, _master),
        loadVector(), displacementVector(), eigVec(), eigVal()
    {
        numberOfSteps = 1;
        ndomains = 1;
    }
    virtual ~LinearStability() { }

    virtual void solveYourself();
    virtual void solveYourselfAt(TimeStep *tStep);

    virtual void doStepOutput(TimeStep *tStep);
    virtual void printOutputAt(FILE *file, TimeStep *tStep);
    //virtual void printOutputAt(FILE *file, TimeStep *tStep, const IntArray &nodeSets, const IntArray &elementSets);
    void terminateLinStatic(TimeStep *tStep);
    int requiresNewLsh() { return 0; }
    virtual void updateYourself(TimeStep *tStep);

    // the intrinsic time of time step defines active eigen value and corresponding vector,
    // for which values can be requested using
    // giveUnknownComponent method.
    // When DisplacementVector is requested, then if time==0 linear elastic solution displacement are returned,
    // otherwise corresponding eigen vector is considered as displacement vector
    virtual double giveUnknownComponent(ValueModeType type, TimeStep *tStep, Domain *d, Dof *dof);
    virtual IRResultType initializeFrom(InputRecord *ir);
    virtual contextIOResultType saveContext(DataStream &stream, ContextMode mode);
    virtual contextIOResultType restoreContext(DataStream &stream, ContextMode mode);
    virtual TimeStep *giveNextStep();

    virtual double giveEigenValue(int eigNum) { return eigVal.at(eigNum); }
    virtual void setActiveVector(int i);

    virtual NumericalMethod *giveNumericalMethod(MetaStep *mStep);
    SparseLinearSystemNM *giveNumericalMethodForLinStaticProblem(TimeStep *tStep);

    // identification
    virtual const char *giveInputRecordName() const { return _IFT_LinearStability_Name; }
    virtual const char *giveClassName() const { return "LinearStability"; }
    virtual fMode giveFormulation() { return TL; }
};
} // end namespace oofem
#endif // linearstability_h