Control Routines

Routines to follow a non-linear solution curve. More...

Collaboration diagram for Control Routines:

Files
file	adaptivestepsizing.hh
	Contains the AdaptiveStepSizing namespace with strategies for adaptive step sizing.
file	controlinfos.hh
	Defines the ControlInformation structure for storing control results.
file	loadcontrol.inl
	Implementation of the run function.
file	pathfollowing.inl
	Implementation of the run function.

Classes
class	Ikarus::PathFollowing< NLS, PF, ASS >
	The PathFollowing control routine for path-following analysis. More...
struct	Ikarus::SubsidiaryArgs
	Structure containing arguments for subsidiary functions. More...
struct	Ikarus::ArcLength
	Structure representing the subsidiary function for the standard arc-length method. More...
struct	Ikarus::LoadControlSubsidiaryFunction
	Structure representing the subsidiary function for the load control method. More...
struct	Ikarus::DisplacementControl
	Structure representing the subsidiary function for the displacement control method. More...

Functions
template<typename NLS >
void	Ikarus::ArcLength::initialPrediction (typename NLS::Domain &req, NLS &nonlinearSolver, SubsidiaryArgs &args)
	Performs the initial prediction for the standard arc-length method. More...

Detailed Description

Function Documentation

initialPrediction()

template<typename NLS >

void Ikarus::ArcLength::initialPrediction ( typename NLS::Domain &  req, NLS &  nonlinearSolver, SubsidiaryArgs &  args  )

inline

This method initializes the prediction step for the standard arc-length method it computes \(\psi\) and computes initial \(\mathrm{D}\mathbf{D}\) and \(\mathrm{D} \lambda\). Based on Eq. 4.13 of [10], the scaling factor psi is modified for better convergence characteristics.

Template Parameters

NLS	Type of the nonlinear solver.

Parameters

req	The solution.
nonlinearSolver	The nonlinear solver.
args	The subsidiary function arguments.