49.20 RandomResponseStep object

The RandomResponseStep object is used to give the linearized response of a model to random excitation.

The RandomResponseStep object is derived from the AnalysisStep object.

Access
import step
mdb.models[name].steps[name]


49.20.1 RandomResponseStep(...)

This method creates a RandomResponseStep object.

Path
mdb.models[name].RandomResponseStep

Required arguments

name

A String specifying the repository key.

previous

A String specifying the name of the previous step. The new step appears after this step in the list of analysis steps.

freq

A RandomResponseFrequencyArray object specifying frequencies over ranges of modes.

Optional arguments

description

A String specifying a description of the new step. The default value is an empty string.

scale

A SymbolicConstant specifying the frequency scale. Possible values are LINEAR and LOG. The default value is LOG.

directDamping

A DirectDamping object.

compositeDamping
rayleighDamping

A RayleighDamping object.

structuralDamping
directDampingByFrequency
rayleighDampingByFrequency
structuralDampingByFrequency
maintainAttributes

A Boolean specifying whether to retain attributes from an existing step with the same name. The default value is False.

Return value

A RandomResponseStep object.

Exceptions

RangeError.


49.20.2 setValues(...)

This method modifies the RandomResponseStep object.

Required arguments

None.

Optional arguments

The optional arguments to setValues are the same as the arguments to the RandomResponseStep method, except for the name, previous, and maintainAttributes arguments.

Return value

None

Exceptions

RangeError.


49.20.3  Members

The RandomResponseStep object can have the following members:

name

A String specifying the repository key.

scale

A SymbolicConstant specifying the frequency scale. Possible values are LINEAR and LOG. The default value is LOG.

previous

A String specifying the name of the previous step. The new step appears after this step in the list of analysis steps.

description

A String specifying a description of the new step. The default value is an empty string.

freq

A RandomResponseFrequencyArray object specifying frequencies over ranges of modes.

directDamping

A DirectDamping object.

compositeDamping
rayleighDamping

A RayleighDamping object.

structuralDamping
directDampingByFrequency
rayleighDampingByFrequency
structuralDampingByFrequency
explicit

A SymbolicConstant specifying whether the step has an explicit procedure type (procedureType=ANNEAL, DYNAMIC_EXPLICIT, or DYNAMIC_TEMP_DISPLACEMENT).

perturbation

A Boolean specifying whether the step has a perturbation procedure type.

nonmechanical

A Boolean specifying whether the step has a mechanical procedure type.

procedureType

A SymbolicConstant specifying the Abaqus procedure. Possible values are:

  • ANNEAL

  • BUCKLE

  • COMPLEX_FREQUENCY

  • COUPLED_TEMP_DISPLACEMENT

  • COUPLED_THERMAL_ELECTRIC

  • DIRECT_CYCLIC

  • DYNAMIC_IMPLICIT

  • DYNAMIC_EXPLICIT

  • DYNAMIC_SUBSPACE

  • DYNAMIC_TEMP_DISPLACEMENT

  • COUPLED_THERMAL_ELECTRICAL_STRUCTURAL

  • FLOW

  • FREQUENCY

  • GEOSTATIC

  • HEAT_TRANSFER

  • MASS_DIFFUSION

  • MODAL_DYNAMICS

  • RANDOM_RESPONSE

  • RESPONSE_SPECTRUM

  • SOILS

  • STATIC_GENERAL

  • STATIC_LINEAR_PERTURBATION

  • STATIC_RIKS

  • STEADY_STATE_DIRECT

  • STEADY_STATE_MODAL

  • STEADY_STATE_SUBSPACE

  • VISCO

suppressed

A Boolean specifying whether the step is suppressed or not. The default value is OFF.

fieldOutputRequestState

A repository of FieldOutputRequestState objects.

historyOutputRequestState

A repository of HistoryOutputRequestState objects.

diagnosticPrint

A DiagnosticPrint object.

monitor

A Monitor object.

restart

A Restart object.

adaptiveMeshConstraintStates

A repository of AdaptiveMeshConstraintState objects.

adaptiveMeshDomains

A repository of AdaptiveMeshDomain objects.

control

A Control object.

solverControl

A SolverControl object.

boundaryConditionStates

A repository of BoundaryConditionState objects.

interactionStates

A repository of InteractionState objects.

loadStates

A repository of LoadState objects.

loadCases

A repository of LoadCase objects.

predefinedFieldStates

A repository of PredefinedFieldState objects.


49.20.4  Corresponding analysis keywords

*DAMPING
*MODAL DAMPING
*RANDOM RESPONSE
*STEP