Newmark.H

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    Copyright (C) 2015 OpenFOAM Foundation
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License
    This file is part of OpenFOAM.
 
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    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
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Class
    Foam::sixDoFSolvers::Newmark
 
Group
    grpSixDoFRigidBodySolvers
 
Description
    Newmark 2nd-order time-integrator for 6DoF solid-body motion.
 
    Reference:
    \verbatim
        Newmark, N. M. (1959).
        A method of computation for structural dynamics.
        Journal of the Engineering Mechanics Division, 85(3), 67-94.
    \endverbatim
 
    Example specification in dynamicMeshDict:
    \verbatim
    solver
    {
        type    Newmark;
        gamma   0.5;    // Velocity integration coefficient
        beta    0.25;   // Position integration coefficient
    }
    \endverbatim
 
SourceFiles
    Newmark.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Newmark_H
#define Newmark_H
 
#include "sixDoFSolver.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace sixDoFSolvers
{
 
/*---------------------------------------------------------------------------*\
                           Class Newmark Declaration
\*---------------------------------------------------------------------------*/
 
class Newmark
:
    public sixDoFSolver
{
    // Private data
 
        //- Coefficient for velocity integration (default: 0.5)
        const scalar gamma_;
 
        //- Coefficient for position and orientation integration (default: 0.25)
        const scalar beta_;
 
 
public:
 
    //- Runtime type information
    TypeName("Newmark");
 
 
    // Constructors
 
        //- Construct from a dictionary and the body
        Newmark
        (
            const dictionary& dict,
            sixDoFRigidBodyMotion& body
        );
 
        //- Construct and return a clone
        virtual autoPtr<sixDoFSolver> clone() const
        {
            return autoPtr<sixDoFSolver>::NewFrom<Newmark>(dict_, body_);
        }
 
 
    //- Destructor
    virtual ~Newmark();
 
 
    // Member Functions
 
        //- Drag coefficient
        virtual void solve
        (
            bool firstIter,
            const vector& fGlobal,
            const vector& tauGlobal,
            scalar deltaT,
            scalar deltaT0
        );
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace sixDoFSolvers
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //