DBFGS.H

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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
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    for more details.
 
    You should have received a copy of the GNU General Public License
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Class
    Foam::DBFGS
 
Description
    The quasi-Newton BFGS formula with the dampening proposed by Powell
 
SourceFiles
    DBFGS.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef DBFGS_H
#define DBFGS_H
 
#include "quasiNewton.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                            Class DBFGS Declaration
\*---------------------------------------------------------------------------*/
 
class DBFGS
:
    public quasiNewton
{
protected:
 
    // Protected data
 
        //- Curvature threshold
        scalar curvatureThreshold_;
 
        //- Threshold for damping
        scalar gamma_;
 
 
    // Protected Member Functions
 
        //- Update approximation of the inverse Hessian
        void updateHessian();
 
        //- Update design variables
        void update();
 
 
private:
 
    // Private Member Functions
 
        //- No copy construct
        DBFGS(const DBFGS&) = delete;
 
        //- No copy assignment
        void operator=(const DBFGS&) = delete;
 
 
public:
 
    //- Runtime type information
    TypeName("DBFGS");
 
 
    // Constructors
 
        //- Construct from components
        DBFGS
        (
            const fvMesh& mesh,
            const dictionary& dict,
            autoPtr<designVariables>& designVars,
            const label nConstraints,
            const word& type
        );
 
 
    //- Destructor
    virtual ~DBFGS() = default;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //