Newmark Class Reference

Newmark 2nd-order time-integrator for 6DoF solid-body motion. More...

#include <Newmark.H>

Inheritance diagram for Newmark:

Collaboration diagram for Newmark:

Public Member Functions
	TypeName ("Newmark")
	Runtime type information.
	Newmark (rigidBodyMotion &body, const dictionary &dict)
	Construct for the given body from dictionary.
virtual	~Newmark ()
	Destructor.
virtual void	solve (const scalarField &tau, const Field< spatialVector > &fx)
	Integrate the rigid-body motion for one time-step.
Public Member Functions inherited from rigidBodySolver
	TypeName ("rigidBodySolver")
	Runtime type information.
	declareRunTimeSelectionTable (autoPtr, rigidBodySolver, dictionary,(rigidBodyMotion &body, const dictionary &dict),(body, dict))
	rigidBodySolver (rigidBodyMotion &body)
virtual	~rigidBodySolver ()
	Destructor.

Additional Inherited Members
Static Public Member Functions inherited from rigidBodySolver
static autoPtr< rigidBodySolver >	New (rigidBodyMotion &body, const dictionary &dict)
Protected Member Functions inherited from rigidBodySolver
rigidBodyModelState &	state ()
	Return the motion state.
scalarField &	q ()
	Return the current joint position and orientation.
scalarField &	qDot ()
	Return the current joint quaternion.
scalarField &	qDdot ()
	Return the current joint acceleration.
scalar	deltaT () const
	Return the current time-step.
const rigidBodyModelState &	state0 () const
	Return the previous motion state.
const scalarField &	q0 () const
	Return the current joint position and orientation.
const scalarField &	qDot0 () const
	Return the current joint quaternion.
const scalarField &	qDdot0 () const
	Return the current joint acceleration.
scalar	deltaT0 () const
	Return the previous time-step.
void	correctQuaternionJoints ()
	Correct the quaternion joints based on the current change in q.
Protected Attributes inherited from rigidBodySolver
rigidBodyMotion &	model_
	The rigid-body model.

Detailed Description

Newmark 2nd-order time-integrator for 6DoF solid-body motion.

Reference:

    Newmark, N. M. (1959).
    A method of computation for structural dynamics.
    Journal of the Engineering Mechanics Division, 85(3), 67-94.

Example specification in dynamicMeshDict:

solver
{
    type    Newmark;
    gamma   0.5;    // Velocity integration coefficient
    beta    0.25;   // Position integration coefficient
}

Source files

• Newmark.H
• Newmark.C

Definition at line 67 of file Newmark.H.

Constructor & Destructor Documentation

Newmark()

Newmark	(	rigidBodyMotion &	body,
		const dictionary &	dict )

Construct for the given body from dictionary.

Definition at line 42 of file Newmark.C.

References dict, Foam::max(), rigidBodySolver::rigidBodySolver(), and Foam::sqr().

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~Newmark()

~Newmark ( )

virtual

Destructor.

Definition at line 63 of file Newmark.C.

Member Function Documentation

TypeName()

TypeName

(

"Newmark"

)

Runtime type information.

References dict.

solve()

void solve ( const scalarField & tau, const Field< spatialVector > & fx )

virtual

Integrate the rigid-body motion for one time-step.

Implements rigidBodySolver.

Definition at line 69 of file Newmark.C.

References rigidBodySolver::correctQuaternionJoints(), rigidBodySolver::deltaT(), rigidBodySolver::model_, rigidBodySolver::q(), rigidBodySolver::q0(), rigidBodySolver::qDdot(), rigidBodySolver::qDdot0(), rigidBodySolver::qDot(), rigidBodySolver::qDot0(), Foam::sqr(), and rigidBodySolver::state().

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The documentation for this class was generated from the following files:

• src/rigidBodyDynamics/rigidBodySolvers/Newmark/Newmark.H
• src/rigidBodyDynamics/rigidBodySolvers/Newmark/Newmark.C