LOCA::MultiContinuation::ArcLengthConstraint Class Reference

Implementation of LOCA::MultiContinuation::ConstraintInterfaceMVDX for arclength continuation. More...

#include <LOCA_MultiContinuation_ArcLengthConstraint.H>

Inheritance diagram for LOCA::MultiContinuation::ArcLengthConstraint:

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Collaboration diagram for LOCA::MultiContinuation::ArcLengthConstraint:
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List of all members.

Public Member Functions

 ArcLengthConstraint (const Teuchos::RefCountPtr< LOCA::GlobalData > &global_data, const Teuchos::RefCountPtr< LOCA::MultiContinuation::ArcLengthGroup > &grp)
 Constructor.
 ArcLengthConstraint (const ArcLengthConstraint &source, NOX::CopyType type=NOX::DeepCopy)
 Copy constructor.
 ~ArcLengthConstraint ()
 Destructor.
virtual ArcLengthConstraintoperator= (const ArcLengthConstraint &source)
 Assignment.
virtual void setArcLengthGroup (const Teuchos::RefCountPtr< LOCA::MultiContinuation::ArcLengthGroup > &grp)
 Set pointer to arclength group.
Implementation of LOCA::MultiContinuation::ConstraintInterface
virtual methods

virtual ConstraintInterfaceoperator= (const ConstraintInterface &source)
 Assignment.
virtual Teuchos::RefCountPtr<
LOCA::MultiContinuation::ConstraintInterface
clone (NOX::CopyType type=NOX::DeepCopy) const
 Cloning function.
virtual int numConstraints () const
 Return number of constraints.
virtual void setX (const NOX::Abstract::Vector &y)
 Set the solution vector to y.
virtual void setParam (int paramID, double val)
 Sets parameter indexed by paramID.
virtual void setParams (const vector< int > &paramIDs, const NOX::Abstract::MultiVector::DenseMatrix &vals)
 Sets parameters indexed by paramIDs.
virtual NOX::Abstract::Group::ReturnType computeConstraints ()
 Compute continuation constraint equations.
virtual NOX::Abstract::Group::ReturnType computeDX ()
 Compute derivative of constraints w.r.t. solution vector x.
virtual NOX::Abstract::Group::ReturnType computeDP (const vector< int > &paramIDs, NOX::Abstract::MultiVector::DenseMatrix &dgdp, bool isValidG)
 Compute derivative of constraints w.r.t. supplied parameters.
virtual bool isConstraints () const
 Return true if constraint residuals are valid.
virtual bool isDX () const
 Return true if derivatives of constraints w.r.t. x are valid.
virtual const NOX::Abstract::MultiVector::DenseMatrixgetConstraints () const
 Return constraint residuals.
virtual const NOX::Abstract::MultiVectorgetDX () const
 Return solution component of constraint derivatives.
virtual bool isDXZero () const
 Return true if solution component of constraint derivatives is zero.

Protected Attributes

Teuchos::RefCountPtr< LOCA::GlobalDataglobalData
 LOCA global data object.
Teuchos::RefCountPtr< LOCA::MultiContinuation::ArcLengthGrouparcLengthGroup
 Pointer to arc-length group.
NOX::Abstract::MultiVector::DenseMatrix constraints
 Constraint values.
bool isValidConstraints
 Flag indicating whether constraints are valid.
vector< int > conParamIDs
 Continuation parameter IDs.

Detailed Description

Implementation of LOCA::MultiContinuation::ConstraintInterfaceMVDX for arclength continuation.

This class implements the arclength constraint equation for pseudo-arclength continuation:

\[ g(x,p,x_0,p_0,x^\ast,p^\ast,v,\Delta s)= (x-x^\ast)^Tv_x + (p-p^\ast) v_p - \Delta s \]

where $v_x$, $v_p$ are the solution and parameter components of the predictor direction $v$ respectively. Since the derivative of $g$ with respect to $x$ is just $v$, the predictor tangent, this class implements the MVDX version of the constraint interface.


Member Function Documentation

NOX::Abstract::Group::ReturnType LOCA::MultiContinuation::ArcLengthConstraint::computeDP const vector< int > &  paramIDs,
NOX::Abstract::MultiVector::DenseMatrix dgdp,
bool  isValidG
[virtual]
 

Compute derivative of constraints w.r.t. supplied parameters.

The first column of dgdp should be filled with the constraint residuals $g$ if isValidG is false. If isValidG is true, then the dgdp contains $g$ on input.

Implements LOCA::MultiContinuation::ConstraintInterface.


The documentation for this class was generated from the following files:
Generated on Thu Sep 18 12:40:46 2008 for NOX by doxygen 1.3.9.1