A single analysis can include multiple substructure generate steps, and
Abaqus/CAE
creates corresponding output database files for each step. Multiple preloading
steps can precede every substructure generation step in your analysis. If you
want to specify retained eigenmodes for substructure generation, you must also
include a frequency extraction step in the analysis.
You cannot have a substructure generation step in a model that contains
model instances.
- Substructure
identifier
-
You must specify a unique identifier for each substructure you create.
Substructure identifiers must begin with the letter
Z followed by a number that cannot exceed
9999.
- Recovery
options
-
You can recover the field output data for a substructure during the usage-level analysis, but you
must specify the recovery region during substructure generation. Substructure recovery
can be performed only on the sets included in the recovery region. You can specify that
recovery be performed on the whole model or for an individual node set or element set.
While performing the substructure recovery in the usage model, Abaqus/CAE must have access to the substructure's .mdl,
.prt, and .stt files. For more information
about these file types, see Generating Substructures.
- Generation
options
-
You can control several aspects of the substructure generation process,
including calculation of gravity load vectors, evaluation of
frequency-dependent material properties, and generation of a reduced mass
matrix, reduced structural damping matrix, and viscous damping matrix.
- Retained
eigenmodes
-
You can specify retained eigenmodes for generation of a coupled
acoustic-structural substructure. When you choose to specify retained
eigenmodes,
Abaqus/CAE
enables you to specify eigenmodes by mode range or by frequency range.
- Damping
-
You can specify several global damping controls and substructure damping
controls. For global damping you can choose to apply damping settings to
acoustic or mechanical options; for substructure damping you can specify
separate controls for viscous and structural damping.