Rayleigh damping factors. More...

#include <RayleighDampingFactors.h>

Inheritance diagram for XC::RayleighDampingFactors:

Public Member Functions
	RayleighDampingFactors (void)
	Constructor.

	RayleighDampingFactors (const double &alphaM, const double &betaK, const double &betaK0, const double &betaKc)
	Constructor. More...

	RayleighDampingFactors (const Vector &)
	constructor

const double &	getAlphaM (void) const
	return the damping factor applied to elements or nodes mass matrix

void	setAlphaM (const double &d)
	set the damping factor applied to elements or nodes mass matrix

const double &	getBetaK (void) const
	return the damping factor applied to elements current stiffness matrix

void	setBetaK (const double &d)
	set the damping factor applied to elements current stiffness matrix

const double &	getBetaK0 (void) const
	return the damping factor applied to elements initial stiffness matrix

void	setBetaK0 (const double &d)
	set the damping factor applied to elements initial stiffness matrix

const double &	getBetaKc (void) const
	return the damping factor applied to elements committed stiffness matrix

void	setBetaKc (const double &d)
	set the damping factor applied to elements committed stiffness matrix

bool	nullValues (void) const
	Returns true if all Rayleigh factors are zero.

bool	nullKValues (void) const
	Returns true if all Rayleigh stiffness factors are zero.

int	updateParameter (int parameterID, Information &info)
	Update the value of a parameter.

int	sendSelf (CommParameters &)
	Sends object through the channel being passed as parameter.

int	recvSelf (const CommParameters &)
	Receives object through the channel being passed as parameter.

void	Print (std::ostream &s, int flag=0) const
	Print Rayleigh factors values.

Public Member Functions inherited from XC::MovableObject
	MovableObject (int classTag, int dbTag)
	Constructor. More...

	MovableObject (int classTag)
	Constructor. More...

	MovableObject (const MovableObject &)
	Copy constructor. Doesn't copy the dbTag.

MovableObject &	operator= (const MovableObject &)
	Assignment operator. Doesn't copy the dbTag.

int	getClassTag (void) const
	Return the class identifier.

int	getDbTag (void) const
	Return the object identifier in the database.

int	getDbTag (CommParameters &)
	Return the object identifier in the database.

void	setDbTag (int dbTag)
	Sets the object identifier in the database.

void	setDbTag (CommParameters &)
	Sets the object identifier in the database if not already set. More...

virtual int	setParameter (const std::vector< std::string > &argv, Parameter &param)
	Sets the value `param` to the parameter `argv`.

virtual int	activateParameter (int parameterID)
	Activates the parameter identified by `parameterID`.

virtual int	setVariable (const std::string &variable, Information &)
	Set the value of the variable idenfified by `var`.

virtual int	getVariable (const std::string &variable, Information &)
	Return the value of the variable idenfified by `var`.

Public Member Functions inherited from XC::DistributedBase
	DistributedBase (void)
	Constructor.

virtual DbTagData &	getDbTagData (void) const
	Returns a vector to store class dbTags.

const int &	getDbTagDataPos (const int &i) const
	Returns the data at the i-th position.

void	setDbTagDataPos (const int &i, const int &v)
	Sets the data at the i-th position.

void	inicComm (const int &dataSize) const
	Initializes communication.

Protected Member Functions
int	sendData (CommParameters &)
	Send object members through the channel being passed as parameter.

int	recvData (const CommParameters &)
	Receives object members through the channel being passed as parameter.

Detailed Description

Rayleigh damping factors.

Objects of this class are used to assign damping to all previously-defined elements and nodes. When using rayleigh damping in XC, the damping matrix for an element or node, D is specified as a combination of stiffness and mass-proportional damping matrices: D = alphaM * M + betaK * Kcurrent + betaKinit * Kinit + betaKcomm * KlastCommit References:

The following paper is something that you should read if you are new to the damping and nonlinear analysis. Finley A. Charney, "Unintended Consequences of Modeling Damping in Structures", J. Struct. Engrg. Volume 134, Issue 4, pp. 581-592 (April 2008).
Petrini, Lorenza , Maggi, Claudio , Priestley, M. J. Nigel and Calvi, G. Michele (2008) "Experimental Verification of Viscous Damping Modeling for Inelastic Time History Analyzes", Journal of Earthquake Engineering, 12:S1, pp. 125 — 145
Hall, J. F.(2006) "Problems encountered from the use (or misuse) of Rayleigh damping" Earthquake Engineering and Structural Dynamic, 35, 525–545

Constructor & Destructor Documentation

§ RayleighDampingFactors()

XC::RayleighDampingFactors::RayleighDampingFactors	(	const double &	aM,
		const double &	bK,
		const double &	bK0,
		const double &	bKc
	)

Constructor.

Parameters

aM	factor applied to elements or nodes mass matrix.
bK	factor applied to elements current stiffness matrix.
bK0	factor applied to elements initial stiffness matrix.
bKc	factor applied to elements committed stiffness matrix.

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

src/domain/mesh/element/utils/RayleighDampingFactors.h
src/domain/mesh/element/utils/RayleighDampingFactors.cc

Public Member Functions

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

§ RayleighDampingFactors()