#include <inverseit.h>

Inheritance diagram for oofem::InverseIteration:

Collaboration diagram for oofem::InverseIteration:

Public Member Functions
	InverseIteration (Domain d, EngngModel m)
virtual	~InverseIteration ()
ConvergedReason	solve (SparseMtrx &A, SparseMtrx &B, FloatArray &x, FloatMatrix &v, double rtol, int nroot) override
const char *	giveClassName () const override
Public Member Functions inherited from oofem::SparseGeneralEigenValueSystemNM
	SparseGeneralEigenValueSystemNM (Domain d, EngngModel m)
	Constructor.
virtual	~SparseGeneralEigenValueSystemNM ()
	Destructor.
std::string	errorInfo (const char *func)
Public Member Functions inherited from oofem::NumericalMethod
	NumericalMethod (Domain d, EngngModel m)
virtual	~NumericalMethod ()
	Destructor.
EngngModel *	giveEngngModel ()
virtual void	initializeFrom (InputRecord &ir)
virtual void	reinitialize ()
virtual void	setDomain (Domain *d)
virtual void	saveContext (DataStream &stream, ContextMode mode)
virtual void	restoreContext (DataStream &stream, ContextMode mode)

Private Attributes
int	nitem
	Max number of iterations.

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

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 82 of file inverseit.h.

Constructor & Destructor Documentation

◆ InverseIteration()

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

Definition at line 47 of file inverseit.C.

References nitem, and oofem::SparseGeneralEigenValueSystemNM::SparseGeneralEigenValueSystemNM().

◆ ~InverseIteration()

virtual oofem::InverseIteration::~InverseIteration ( )

inlinevirtual

Definition at line 90 of file inverseit.h.

Member Function Documentation

◆ giveClassName()

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

inlineoverridevirtual

Implements oofem::SparseGeneralEigenValueSystemNM.

Definition at line 93 of file inverseit.h.

◆ solve()

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

overridevirtual

Solves the given sparse generalized eigen value system of equations \( Av = x^2 Bv \).

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 55 of file inverseit.C.

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

Member Data Documentation

◆ nitem

int oofem::InverseIteration::nitem

private

Max number of iterations.

Definition at line 86 of file inverseit.h.

Referenced by InverseIteration(), and solve().

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

Public Member Functions

Private Attributes

Additional Inherited Members