Working with Assemblies
When
working with assemblies, note the following:
Click Tools,
Interference Detection to check
interference. Make sure that the Treat
coincidence as interference option is unchecked. All parts should
be free from interference with each other for proper modeling. The shrink
fit contact option requires interfering geometry. The software allows
you to mesh components with interfering boundaries unless it encounters
difficulty in resolving imprinting components to find the common areas.
Components with free contact setting are not imprinted.
Check the interference again with the Treat
coincidence as interference option checked. This shows the common
areas shared by different components. A component that does not share
common areas with other components acts as if it is completely disconnected
unless a connector mechanism is defined to connect it with other components.
Click Tools,
Check to check for invalid faces
and invalid edges. Checking for short edges can help in diagnosing meshing
problems.
You can exclude a component or a shell from analysis
by suppressing it and then remeshing the model. If a mesh exists and you
do not remesh, the components will be considered in the analysis.
-or-
Right-click on the part and select
Exclude from Analysis. The part is excluded from the study without
suppression.
You can simplify large
assemblies by right-clicking on the part in the study and selecting:
Make
Rigid. Available for static, frequency, buckling and nonlinear
studies. The solid body cannot deform but can move (translate or rotate). Displacements are computed but results
for strains and stresses are not computed.
However, its contact interactions are considered in simulation.
This option toggles back to Make Deformable.
Fix. Available for static, frequency, buckling
and nonlinear studies only. The solid body can neither move nor deform.
Since the entire body is not allowed to move, it is effectively made rigid
as well. A fixed body can still transfer contact interactions to touching
parts. The option toggles to Float.
Note: Treating a solid body as rigid can
introduce errors in simulation. See When
to Define a Rigid Body for details.
To fix a portion
of a body, use the Fixed Geometry option
in Fixture PropertyManager.
You can update the component lists for a study.
To update all studies, right-click the assembly document's icon in the
Simulation study tree and select Update
Components for All Studies. To update one study, right click the
study's icon and select Update All Components.
Hiding a component does not exclude it from analysis.
In other words, the program meshes hidden components. You can hide components
and create exploded views for improved selection and viewing during study
definition and result viewing.
Setting component,
and local
contact options is critical to simulate the proper behavior of the model.
The Contact Sets
PropertyManager helps you define contact sets.
For multibody components, you can assign a different
material for each body.
Related Topic
Rigid Body