linearAxialAngularSpring.H

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    Copyright (C) 2011-2013 OpenFOAM Foundation
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License
    This file is part of OpenFOAM.
 
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Class
    Foam::sixDoFRigidBodyMotionRestraints::linearAxialAngularSpring
 
Description
    sixDoFRigidBodyMotionRestraints model.  Linear axial angular spring.
 
SourceFiles
    linearAxialAngularSpring.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef linearAxialAngularSpring_H
#define linearAxialAngularSpring_H
 
#include "sixDoFRigidBodyMotionRestraint.H"
#include "point.H"
#include "tensor.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
namespace sixDoFRigidBodyMotionRestraints
{
 
/*---------------------------------------------------------------------------*\
                   Class linearAxialAngularSpring Declaration
\*---------------------------------------------------------------------------*/
 
class linearAxialAngularSpring
:
    public sixDoFRigidBodyMotionRestraint
{
    // Private data
 
        //- Reference orientation where there is no moment
        tensor refQ_;
 
        //- Global unit axis around which the motion is sprung
        vector axis_;
 
        //- Spring stiffness coefficient (Nm/rad)
        scalar stiffness_;
 
        //- Damping coefficient (Nms/rad)
        scalar damping_;
 
 
public:
 
    //- Runtime type information
    TypeName("linearAxialAngularSpring");
 
 
    // Constructors
 
        //- Construct from components
        linearAxialAngularSpring
        (
            const word& name,
            const dictionary& sDoFRBMRDict
        );
 
        //- Construct and return a clone
        virtual autoPtr<sixDoFRigidBodyMotionRestraint> clone() const
        {
            return autoPtr<sixDoFRigidBodyMotionRestraint>
            (
                new linearAxialAngularSpring(*this)
            );
        }
 
 
    //- Destructor
    virtual ~linearAxialAngularSpring();
 
 
    // Member Functions
 
        //- Calculate the restraint position, force and moment.
        //  Global reference frame vectors.
        virtual void restrain
        (
            const sixDoFRigidBodyMotion& motion,
            vector& restraintPosition,
            vector& restraintForce,
            vector& restraintMoment
        ) const;
 
        //- Update properties from given dictionary
        virtual bool read(const dictionary& sDoFRBMRCoeff);
 
        //- Write
        virtual void write(Ostream&) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace solidBodyMotionFunctions
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //