neumannmomentload.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 NEUMANNMOMENTLOAD_H
#define NEUMANNMOMENTLOAD_H
 
#include "boundaryload.h"
#include "element.h"
 
#define _IFT_NeumannMomentLoad_Name "momentload"
#define _IFT_NeumannMomentLoad_Gradient "gradient"
#define _IFT_NeumannMomentLoad_Constant "constant"
#define _IFT_NeumannMomentLoad_CenterSet "cset"

namespace oofem {
class OOFEM_EXPORT NeumannMomentLoad : public SurfaceLoad
{
private:
    FloatArray xbar;
    int cset;
    IntArray celements;
    FloatArray g;
    double p;

    void computeXbar();

    void computeNormal(FloatArray &answer, Element *e, int side);
public:
    NeumannMomentLoad(int i, Domain * d) : SurfaceLoad(i, d) { }
    virtual ~NeumannMomentLoad() {}
 
    void computeValueAt(FloatArray &answer, TimeStep *tStep, const FloatArray &coords, ValueModeType mode) override;
    int giveApproxOrder() override { return 0; }
 
    FormulationType giveFormulationType() override { return FT_Global; }
 
    void computeValueAtBoundary(FloatArray &answer, TimeStep *tStep, const FloatArray &coords, ValueModeType mode, Element *e, int boundary);
    void updateLoad(const FloatArray &newValue) { componentArray = newValue; }
 
    void initializeFrom(InputRecord &ir) override;
    bcGeomType giveBCGeoType() const override { return SurfaceLoadBGT; }
 
    const char *giveClassName() const override { return "NeumannMomentLoad"; }
    const char *giveInputRecordName() const override { return _IFT_NeumannMomentLoad_Name; }
 
private:
    void computeNArray(FloatArray &answer, const FloatArray &coords) const override { answer.clear(); }
};
} // end namespace oofem
 
 
#endif // NEUMANNMOMENTLOAD_H