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Surface support group (Geometry)

Last modified by Iwona Budny Bjergø on 2022/01/18 12:22

Surface support group propertyDescription
Modules where available1585147609675-338.png 1585147625600-452.png
Motion component directionParallel with Global Z axis in 1585147615467-180.png
 Arbitrary direction in 1585147622331-404.png
Rotation component directionNot available 1585147611865-207.png 1585147631816-158.png
GeometryArbitrary region shape; holes can be placed into it
Available analysis resultsReaction forces
Load can be assignedSurface support motion load 1585147642676-248.png
Default Short CommandSSF

Definition steps

warning.pngWhile support definition, keep in mind not to create unstable situation! For example in 3D modules, model a hinged support under a wall with hinged line support added to a wall at its rigid edge or with rigid line support added to a wall at its hinged wall. In case of unstable situation the program sends a warning message during calculation.


Figure: Modeling same wall support condition in two ways

  1. If needed (and available in the current FEM-Design module), set a proper position for the working plane.
  2. Start the required support command from 1585147714874-154.png  tabmenu and choose 1585147720438-421.png  Define.
  3. In case of single Support, choose the displacement type you would like to be define:
    • 1585147726470-776.png  Motion
    • 1585147731498-596.png  Rotation
  4. Set the support properties as mentioned before in the applied support’s Default settings dialog. See the settings possibilities and options at Properties (Non-Linear Behaviors).
    In the settings dialog of a curved line support, the support direction has to set fixed or variable along the support’s reference line.
     Figure: Possible support directions in case of curved reference line
  5. Define the required support component direction for the single Support or set the reference system for the Support group.
  6. Choose a geometry definition method for the support’s reference point/line/region.
  7. Define the support in the model view based on the chosen geometry method.

Optional steps:

  1. Modify the geometry with the Edit menu commands valid for line/region elements.
  2. Modify the support properties with the 1586841858016-895.png  Properties tool of the support’s tool palette.
  3. Set the display settings of supports at Settings > All > Display > Support.1585147746066-552.png
    warning.pngLabel” represents the supports’ ID number generated by analysis/design calculation or by clicking Refresh numbering (Tools menu).

    Rotation support is displayed with symbol strongly different from motion representation.

    Figure: Typical symbols by support types

    light.pngSupport groups can also be separated from the single Supports by displaying their Local system.


    Figure: Local system separates a one-component Support group from a same directional single Support

  4. The supports are stored on “Supports” Object layers. At layer settings, the default color of the single Supports and pen width of all support types can be set. The color and the symbol line type (e.g. dotted) of selected supports can be modified by Edit > Properties > Change appearance.