3.2.7. analysis Command

This is the command issued to create an analysis.

analysis analysisType? <-numSublevels $x -numSubSteps $y>

Argument	Type	Description
$analysisType	string	type of analysis object to be constructed. Currently 3 valid options:
		Static - for static analysis
		Transient - for transient analysis with constant time step
		VariableTransient - for transient analysis with variable time step
$x	integer	number of sublevels transient analysis should try if failure
$y	integer	number of subdivisions to be tried at each sublevel

Note

The <-numSublevels $x -numSubSteps $y> only works for the Transient type

The components of the analysis, i.e. numberer, constraint handler, system, test, integrator, algorithm, should all be issued BEFORE the analysis object is created.

The VariableTransient option is still available. The optional additions for the Transient analysis have been found to provide better options for nonlinear problems with convergence issues.

Warning

When switching from one type of analysis to another, e.g. Static to Transient, it is necessary to issue a wipeAnalysis Command.

Static Analysis Example

The following example shows how to construct a Static analysis.

Tcl Code

system SuperLU
constraints Transformation
numberer RCM
test NormDispIncr 1.0e-12  10 3
algorithm Newton
integrator LoadControl 0.1
analysis Static

Python Code

system('SuperLU');
constraints('Transformation')
numberer('RCM')
test('NormDispIncr',1.0e-12, 10, 3)
algorithm('Newton')
integrator('LoadControl', 0.1)
analysis Static

Transient Analysis Example

The following example shows how to construct a Transient analysis.

Tcl Code

system SuperLU
constraints Transformation
numberer RCM
test NormDispIncr 1.0e-12  10 3
algorithm Newton
integrator Newmark 0.5 0.25
analysis Transient -numSubLevels 3  -numSubSteps 10

Python Code

system('SuperLU');
constraints('Transformation')
numberer('RCM')
test('NormDispIncr',1.0e-12, 10, 3)
algorithm('Newton')
integrator('Newmark', 0.5, 0.25)
analysis('Transient')

Code Developed by fmk