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This task
shows how to create a clamp on a geometry. Clamps are restraints applied to surface or curve
geometries, for which all points are to be blocked in the subsequent
analysis.
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means that there is no translation degree of freedom left in that
direction.
Clamp objects belong to Restraints sets.
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Clamps can be applied to the following types of supports:
Geometrical Feature |
Mechanical Feature |
Analysis Feature |
Spatial Groups |
Geometrical Groups |
Groups by Neighborhood |
Groups by Boundary |
Others |
Point/Vertex
Edge
Face |
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Virtual Part |
To know more, refer to Authorized
Supports. |
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Open the
sample02.CATAnalysis document from the samples directory.
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Click Clamp
in the Restraints toolbar.
The Clamp dialog box appears.
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If needed, modify the name of the restraint in the
Name box.
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Select one or several supports (multi-selection of
supports is available).
In this particular example, select in sequence the two following
faces:
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Any selectable geometry is highlighted when you pass the cursor over
it.
You can select several supports in sequence, to apply
the clamp to all supports simultaneously.
Symbols representing a fixed translation in all directions of the
selected geometry are displayed. |
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If needed, click Select Mesh Part
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this button is available only if a geometrical
support is selected.
To know more, refer to Selecting Mesh Parts. |
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Click OK.
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A Clamp object appears in the
specification
tree under the active Restraints set.
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- You can either select the support and then set the clamp
specifications, or set the clamp specifications and then select the
support.
- If several Analysis Cases have been defined in the Finite Element
Model, you must activate a restraints set in the specification tree
before creating a clamp.
- Restraints are required for Stress Analysis computations. They are
optional for modal analysis computations (if not created, the program
will compute vibration modes for the free, unrestrained part).
- Clamp objects can be edited by a double click on the corresponding
object or icon in the specification tree.
- Make sure you fixed all the global degrees of freedom of
your assembly, otherwise a global singularity will be detected at the time
of the Static Computation (such a model is unsolvable). To allow you to
easily correct the model (Static Analysis Cases only), the singular
displacement of the assembly will be simulated and visualized after
computation.
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The ELFINI Structural Analysis product offers the
following additional functionalities:
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