linearDamper.C

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    Copyright (C) 2013-2016 OpenFOAM Foundation
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

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    under the terms of the GNU General Public License as published by
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    for more details.

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#include "linearDamper.H"
#include "addToRunTimeSelectionTable.H"
#include "sixDoFRigidBodyMotion.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
namespace sixDoFRigidBodyMotionRestraints
{
    defineTypeNameAndDebug(linearDamper, 0);

    addToRunTimeSelectionTable
    (
        sixDoFRigidBodyMotionRestraint,
        linearDamper,
        dictionary
    );
}
}


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::sixDoFRigidBodyMotionRestraints::linearDamper::linearDamper
(
    const word& name,
    const dictionary& sDoFRBMRDict
)
:
    sixDoFRigidBodyMotionRestraint(name, sDoFRBMRDict),
    coeff_()
{
    read(sDoFRBMRDict);
}


// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //

Foam::sixDoFRigidBodyMotionRestraints::linearDamper::~linearDamper()
{}


// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //

void Foam::sixDoFRigidBodyMotionRestraints::linearDamper::restrain
(
    const sixDoFRigidBodyMotion& motion,
    vector& restraintPosition,
    vector& restraintForce,
    vector& restraintMoment
) const
{
    restraintForce = -coeff_*motion.v();
    restraintMoment = Zero;

    if (motion.report())
    {
        Info<< " force " << restraintForce
            << endl;
    }
}


bool Foam::sixDoFRigidBodyMotionRestraints::linearDamper::read
(
    const dictionary& sDoFRBMRDict
)
{
    sixDoFRigidBodyMotionRestraint::read(sDoFRBMRDict);

    sDoFRBMRCoeffs_.readEntry("coeff", coeff_);

    return true;
}


void Foam::sixDoFRigidBodyMotionRestraints::linearDamper::write
(
    Ostream& os
) const
{
    os.writeEntry("coeff", coeff_);
}


// ************************************************************************* //