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Degree of Freedom Analysis Tool
With the “Degree of Freedom Analysis” (DOF) tool you can analyze the connections and
boundary conditions of bodies to verify that bodies are sufficiently constrained. You can
view animations of the model based on the active degrees of freedom and identify bodies
that are underconstrained before you run the analysis.
The Degree of Freedom Analysis tool is a diagnostic tool that helps you visualize the
parts in a model that exhibit translational or rotational rigid body modes.
In a static study, right-click the top study icon and click DOF Analysis.
Click Calculate to run the DOF analysis. The DOF Analysis tool applies a coarse mesh
and runs the static study (using the Direct Sparse Solver) with all defined loads,
connectors, and boundary conditions.
If the DOF analysis detects bodies that can translate or rotate freely exhibiting rigid body
modes, it lists these bodies and the directional active degrees of freedom (translations
and rotations) under Unconstrained bodies.
Select one of the listed degrees of freedom (for example, Translation 1 or Rotation 1)
to view an animated translation of the underconstrained body. A green arrow in the
graphics area points to the direction of free movement. |
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