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Transform Constraint

In one sentence: Apply displacement boundary conditions in a local coordinate system rather than the global X/Y/Z frame.

Overview

Workbench: FEM
Menu: FEM → Model → Geometrical Analysis Features → Transform Constraint

Applies displacement boundary conditions in a local coordinate system (cylindrical or Cartesian) rather than global X/Y/Z. This allows constraints that are impossible to express cleanly in global coordinates.

When to use it

  • Cylindrical symmetry: Fix radial displacement on a cylindrical face while allowing circumferential and axial displacement.
  • Inclined surface: Constrain motion normal to an inclined surface (e.g. a 30° chamfer must not penetrate a mating part).

Step-by-step

  1. Choose FEM → Model → Geometrical → Transform Constraint.
  2. Select the face to constrain.
  3. Set the coordinate system type (Cylindrical or Cartesian) and orientation.
  4. Set which components are fixed in the local system.
  5. Click OK.

See also