linearDamper.C

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2013-2016 OpenFOAM Foundation
-------------------------------------------------------------------------------
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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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    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_);
}
 
 
// ************************************************************************* //