oofem::InverseIteration Class Reference

This class implements the class NumericalMethod instance Generalized Jacobi Eigen Value Problem Solver. More...

#include <inverseit.h>

Inheritance diagram for oofem::InverseIteration:

Collaboration diagram for oofem::InverseIteration:

Public Member Functions
	InverseIteration (Domain *d, EngngModel *m)
virtual	~InverseIteration ()
virtual NM_Status	solve (SparseMtrx &A, SparseMtrx &B, FloatArray &x, FloatMatrix &v, double rtol, int nroot)
	Solves the given sparse generalized eigen value system of equations . More...
virtual const char *	giveClassName () const
Public Member Functions inherited from oofem::SparseGeneralEigenValueSystemNM
	SparseGeneralEigenValueSystemNM (Domain *d, EngngModel *m)
	Constructor. More...
virtual	~SparseGeneralEigenValueSystemNM ()
	Destructor. More...
std::string	errorInfo (const char *func)
Public Member Functions inherited from oofem::NumericalMethod
	NumericalMethod (Domain *d, EngngModel *m)
	Constructor. More...
virtual	~NumericalMethod ()
	Destructor. More...
EngngModel *	giveEngngModel ()
virtual IRResultType	initializeFrom (InputRecord *ir)
virtual void	reinitialize ()
	Reinitializes the receiver. More...
virtual void	setDomain (Domain *d)
virtual contextIOResultType	saveContext (DataStream &stream, ContextMode mode, void *obj=NULL)
virtual contextIOResultType	restoreContext (DataStream &stream, ContextMode mode, void *obj=NULL)

Private Attributes
int	nitem

Additional Inherited Members
Protected Attributes inherited from oofem::NumericalMethod
Domain *	domain
	Pointer to domain. More...
EngngModel *	engngModel
	Pointer to engineering model. More...

Detailed Description

This class implements the class NumericalMethod instance Generalized Jacobi Eigen Value Problem Solver.

DESCRIPTION : Perform solution of eigen value problem in the form K y = (omega)^2 M y

TASKS :

• solving problem solveYourselfAt.
• returning results (eigen values and associated eigen vectors).

Variable description :

  A(N,N)    = STIFFNESS MATRIX (ASSUMED POZITIVE DEFINITE)        *
  B(N,N)    = MASS MATRIX (ASSUMED POZITIVE DEFINITE)             *
  X(N,N)    = MATRIX STORING EIGENVECTORS ON SOLUTION EXIT        *
  EIGV(N)   = VECTOR STORING EIGENVALUES ON SOLUTION EXIT         *
  D(N)      = WORKING VECTOR                                      *
  N         = ORDER OF WORKING AREA MATRICES A AND B              *
  RTOL      = CONVERGENCE TOLERANCE (USUALLY SET TO 10.**-12)     *
  NSMAX     = MAXIMUM NUMBER OF SWEEPS ALLOVED                    *
                            (USUALLY SET TO 15)                   *

OUTPUT : (after call solveYourselfAt) A(N,N) = DIAGONALIZED STIFFNESS MATRIX * B(N,N) = DIAGONALIZED MASS MATRIX * X(N,N) = EIGENVECTORS STORED COLUMNWISE * EIGV(N) = EIGENVALUES *

Definition at line 86 of file inverseit.h.

Constructor & Destructor Documentation

oofem::InverseIteration::InverseIteration	(	Domain *	d,
		EngngModel *	m
	)

Definition at line 47 of file inverseit.C.

References nitem.

oofem::InverseIteration::~InverseIteration ( )

virtual

Definition at line 54 of file inverseit.C.

Member Function Documentation

virtual const char* oofem::InverseIteration::giveClassName ( ) const

inlinevirtual

Implements oofem::SparseGeneralEigenValueSystemNM.

Definition at line 96 of file inverseit.h.

NM_Status oofem::InverseIteration::solve ( SparseMtrx &  A, SparseMtrx &  B, FloatArray &  x, FloatMatrix &  v, double  rtol, int  nroot  )

virtual

Solves the given sparse generalized eigen value system of equations .

Parameters

A	coefficient matrix.
B	coefficient matrix.
v	eigen vector(s).
x	eigen value(s).
rtol	tolerance
nroot	number of required eigenvalues.

Returns

NM_Status value.

Implements oofem::SparseGeneralEigenValueSystemNM.

Definition at line 57 of file inverseit.C.

References oofem::IntArray::at(), oofem::FloatArray::at(), oofem::SparseMtrx::at(), oofem::IntArray::begin(), oofem::ClassFactory::createSparseLinSolver(), oofem::NumericalMethod::domain, oofem::IntArray::end(), oofem::NumericalMethod::engngModel, oofem::IntArray::enumerate(), oofem::GiveClassFactory(), oofem::SparseMtrx::giveNumberOfColumns(), oofem::min(), nitem, NM_Success, OOFEM_ERROR, OOFEM_LOG_INFO, OOFEM_WARNING, oofem::FloatArray::resize(), oofem::FloatMatrix::resize(), oofem::FloatMatrix::setColumn(), oofem::SparseLinearSystemNM::solve(), oofem::sort(), oofem::ST_Direct, and oofem::SparseMtrx::times().

Member Data Documentation

int oofem::InverseIteration::nitem

private

Definition at line 89 of file inverseit.h.

Referenced by InverseIteration(), and solve().

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

• inverseit.h
• inverseit.C