problem

Problem

A Problem is a collection of analysis steps (:class:`compas_fea2.problem._Step) applied in a specific sequence.

Steps

`Step`	Initialises base Step object.
`GeneralStep`	General Step object for use as a base class in a general static, dynamic or multiphysics analysis.
`_Perturbation`	A perturbation is a change of the state of the structure after an analysis step.
`ModalAnalysis`	Perform a modal analysis of the Model from the resulting state after an analysis Step.
`ComplexEigenValue`
`StaticStep`	StaticStep for use in a static analysis.
`LinearStaticPerturbation`
`BucklingAnalysis`
`DynamicStep`	Step for dynamic analysis.
`QuasiStaticStep`	Step for quasi-static analysis.
`DirectCyclicStep`	Step for a direct cyclic analysis.

Prescribed Fields

`_PrescribedField`	Base class for all predefined initial conditions.
`PrescribedTemperatureField`	Temperature field

Loads

`Load`	Initialises base Load object.
`PrestressLoad`	Prestress load
`NodeLoad`	Concentrated forces and moments [units:N, Nm] applied to node(s).
`EdgeLoad`	Distributed line forces and moments [units:N/m or Nm/m] applied to an edge of an element.
`FaceLoad`	Distributed area force [e.g.
`GravityLoad`	Gravity load [units:N/m3] applied to element(s).
`TributaryLoad`	Tributary load
`HarmonicPointLoad`
`HarmonicPressureLoad`
`ThermalLoad`	Thermal load

Combinations

LoadCombination

Load combination object used to combine patterns together at each step.

Displacements

GeneralDisplacement

GeneralDisplacement object.

Load Patterns

`Pattern`	A pattern is the spatial distribution of a specific set of forces, displacements, temperatures, and other effects which act on a structure.
`NodeLoadPattern`	Nodal distribution of a load case.
`PointLoadPattern`	Point distribution of a load case.
`LineLoadPattern`	Line distribution of a load case.
`AreaLoadPattern`	Area distribution of a load case.
`VolumeLoadPattern`	Volume distribution of a load case (e.g., gravity load).

Outputs

`FieldOutput`	FieldOutput object for specification of the fields (stresses, displacements, etc..) to output from the analysis.
`HistoryOutput`	HistoryOutput object for recording the fields (stresses, displacements, etc..) from the analysis.