linearAxialAngularSpring.H

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License
    This file is part of OpenFOAM.
 
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Class
    Foam::RBD::restraints::linearAxialAngularSpring
 
Description
    Linear axial angular spring restraint.
 
SourceFiles
    linearAxialAngularSpring.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef linearAxialAngularSpring_H
#define linearAxialAngularSpring_H
 
#include "rigidBodyRestraint.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace RBD
{
namespace restraints
{
 
/*---------------------------------------------------------------------------*\
                  Class linearAxialAngularSpring Declaration
\*---------------------------------------------------------------------------*/
 
class linearAxialAngularSpring
:
    public restraint
{
    // 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& dict,
            const rigidBodyModel& model
        );
 
        //- Construct and return a clone
        virtual autoPtr<restraint> clone() const
        {
            return autoPtr<restraint>
            (
                new linearAxialAngularSpring(*this)
            );
        }
 
 
    //- Destructor
    virtual ~linearAxialAngularSpring();
 
 
    // Member Functions
 
        //- Accumulate the retraint internal joint forces into the tau field and
        //  external forces into the fx field
        virtual void restrain
        (
            scalarField& tau,
            Field<spatialVector>& fx,
            const rigidBodyModelState& state
        ) const;
 
        //- Update properties from given dictionary
        virtual bool read(const dictionary& dict);
 
        //- Write
        virtual void write(Ostream&) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace RBD
} // End namespace RBD
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //