StructuralSEIAssignment Properties

(To be removed) Superelement interface assignment for structural model

StructuralSEIAssignment will be removed. Use the ROMInterfaces property of femodel instead. (since R2023a) For more information on updating your code, see Version History.

A StructuralSEIAssignment object contains a description of the superelement interfaces for a structural analysis model. A StructuralModel container has a vector of StructuralSEIAssignment objects in its SuperelementInterfaces.StructuralSEIAssignments property.

Properties of StructuralSEIAssignment

RegionType — Region type

'Vertex' | 'Edge' | 'Face' (for a 3-D model only)

Region type, specified as 'Vertex', 'Edge', or, for a 3-D model, 'Face'.

Data Types: char | string

RegionID — Region ID

positive integer

Geometric region ID, specified as a positive integer. Find the region IDs by using pdegplot.

Data Types: double

Version History

Introduced in R2019b

R2025a: To be removed

StructuralSEIAssignment will be removed. Use the ROMInterfaces property of femodel instead.

For example, specify the fixed and loaded boundaries as structural superelement interfaces by creating a romInterface object for each superelement interface. In this case, the reduced order model retains the degrees of freedom (DoFs) on the fixed face and the loaded vertex while condensing all other DoFs in favor of modal DoFs.

gm = multicuboid(0.1,0.01,0.01);
model = femodel(AnalysisType="structuralModal", ...
                Geometry=gm);
romObj1 = romInterface(Edge=[4 6 9 10]);
romObj2 = romInterface(Edge=[2 8 11 12]);
model.ROMInterfaces = [romObj1,romObj2];

Check the superelement interface assignment.

model.ROMInterfaces(1)
model.ROMInterfaces(2)

The unified finite element model workflow defines the type of a problem and all of its parameters as the properties of an femodel object. This object enables you to specify physical parameters for structural, thermal, and electromagnetic types of analyses. The solver in the unified workflow uses only the parameters (properties) appropriate for the current analysis type while ignoring all other properties. If you switch the analysis type by setting the AnalysisType property of the model, the solver uses the appropriate set of properties corresponding to the new analysis type.

For more help migrating your existing code that uses StructuralModel to the unified finite element workflow, see Migration from Domain-Specific to Unified Workflow and Reduced-Order Modeling Technique for Beam with Point Load.