itk::fem::LoadBCMFC Class Reference

Generic linear multi freedom displacement constraint in global coordinate system. More...

#include <itkFEMLoadBCMFC.h>

Inheritance diagram for itk::fem::LoadBCMFC:

[legend]Collaboration diagram for itk::fem::LoadBCMFC:

[legend]List of all members.

Public Types
typedef LoadBCMFC	Self
typedef Load	Superclass
typedef Self *	Pointer
typedef const Self *	ConstPointer
typedef std::vector< MFCTerm >	LhsType
Public Member Functions
virtual Baseclass::Pointer	Clone () const
virtual int	ClassID () const
	LoadBCMFC ()
	LoadBCMFC (Element::ConstPointer element, int dof, vnl_vector< Element::Float > val)
virtual void	Read (std::istream &f, void *info)
virtual void	Write (std::ostream &f) const
Static Public Member Functions
Self::Pointer	New ()
Public Attributes
LhsType	lhs
vnl_vector< Element::Float >	rhs
int	Index
Static Public Attributes
const int	CLID
Friends
class	Solver

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Detailed Description

Generic linear multi freedom displacement constraint in global coordinate system.

These constraints are implemented using the Lagrange multiplier method. We treat displacement constraints (or essential boundary conditions, which are exactly the same but with less functionality) as a special kind of load on the system.

How to store data in a LoadBCMFC object... Suppose you want to impose the following constraint to the system:

0.5*u1x + 2.1*u5y = 10.0

u1x is the first DOF in the element with global number 1, and u5y is the second DOF in an element with GN=5.

... then use the following lines of code itk::LoadBCMFC m; m.lhs.push_back( LoadBCMFC::MFCTerm( elements.Find(1), 0, 0.5 ) ); m.lhs.push_back( LoadBCMFC::MFCTerm( elements.Find(5), 1, 2.1 ) ); m.rhs=10.0;

Definition at line 55 of file itkFEMLoadBCMFC.h.

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Member Typedef Documentation

typedef const Self* itk::fem::LoadBCMFC::ConstPointer

Const pointer or SmartPointer to an object. Reimplemented from itk::fem::Load. Definition at line 57 of file itkFEMLoadBCMFC.h.

typedef std::vector<MFCTerm> itk::fem::LoadBCMFC::LhsType

Left hand side of the MFC constraint equation Definition at line 93 of file itkFEMLoadBCMFC.h.

typedef Self* itk::fem::LoadBCMFC::Pointer

Pointer or SmartPointer to an object. Reimplemented from itk::fem::Load. Definition at line 57 of file itkFEMLoadBCMFC.h.

typedef LoadBCMFC itk::fem::LoadBCMFC::Self

Standard Self typedef. Reimplemented from itk::fem::Load. Definition at line 57 of file itkFEMLoadBCMFC.h.

typedef Load itk::fem::LoadBCMFC::Superclass

Standard Superclass typedef. Reimplemented from itk::fem::Load. Definition at line 57 of file itkFEMLoadBCMFC.h.

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Constructor & Destructor Documentation

itk::fem::LoadBCMFC::LoadBCMFC (   )  [inline]

Default constructor Definition at line 105 of file itkFEMLoadBCMFC.h.

itk::fem::LoadBCMFC::LoadBCMFC (  Element::ConstPointer  element, int  dof, vnl_vector< Element::Float >  val )

With this constructor, we can easy fix the global displacement dof given by node to a value val. Parameters: element  Pointer to an element, which holds a displacements that needs to be fixed. dof  Local DOF number in an element. val  The fixed value of a DOF.

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Member Function Documentation

virtual int itk::fem::LoadBCMFC::ClassID (   )  const [inline, virtual]

Virtual function to access the class ID Implements itk::fem::FEMLightObject. Definition at line 57 of file itkFEMLoadBCMFC.h.

virtual Baseclass::Pointer itk::fem::LoadBCMFC::Clone (   )  const [virtual]

Create a new object from the existing one Implements itk::fem::FEMLightObject.

Self::Pointer itk::fem::LoadBCMFC::New (  void   )  [inline, static]

Object creation in an itk compatible way Definition at line 57 of file itkFEMLoadBCMFC.h.

virtual void itk::fem::LoadBCMFC::Read (  std::istream &  f, void *  info )  [virtual]

read a LoadBCMFC object from input stream. Reimplemented from itk::fem::FEMLightObject.

virtual void itk::fem::LoadBCMFC::Write (  std::ostream &  f  )  const [virtual]

write a LoadBCMFC object to the output stream Reimplemented from itk::fem::FEMLightObject.

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Friends And Related Function Documentation

friend class Solver [friend]

Definition at line 127 of file itkFEMLoadBCMFC.h.

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Member Data Documentation

const int itk::fem::LoadBCMFC::CLID [static]

Class ID for FEM object factory Definition at line 57 of file itkFEMLoadBCMFC.h.

int itk::fem::LoadBCMFC::Index

used internally by the Solver class Definition at line 126 of file itkFEMLoadBCMFC.h.

LhsType itk::fem::LoadBCMFC::lhs

Definition at line 94 of file itkFEMLoadBCMFC.h.

vnl_vector<Element::Float> itk::fem::LoadBCMFC::rhs

Right hand side of the linear equation that defines the constraints. It is a vector so that implementation of BC on isotropic elements is easy. Which value is applied to the master force vector is defined by optional dim parameter (defaults to 0) in AssembleF function in solver. Definition at line 102 of file itkFEMLoadBCMFC.h.

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

• itkFEMLoadBCMFC.h

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