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Line support (Geometry)

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

Line support propertyDescription
Modules where available1585146606730-287.png 1585146628771-636.png 1585146649139-916.png 1585146676795-124.png
Motion component directionParallel with Global Z axis in 1585146612044-707.png
 Arbitrary direction in Global XY plane in 1585146638136-647.png 1585146652608-368.png
 Arbitrary direction in 1585146677640-957.png
Rotation component directionArbitrary direction in Global XY plane in 1585146618602-446.png
 Not available in 1585146630379-260.png 1585146655449-543.png
 Arbitrary direction in 1585146683177-999.png
GeometryStraight or curved reference line
Available analysis resultsReaction forces and moments
Load can be assignedLine support motion load 1585146663741-917.png
Default Short CommandSLN

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 1585146737346-777.png  tabmenu and choose 1585146743110-711.png  Define.
  3. In case of single Support, choose the displacement type you would like to be define:
    • 1585146749972-587.png  Motion
    • 1585146755863-260.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 1585146773209-529.png  Properties tool of the support’s tool palette.
  3. Set the display settings of supports at Settings > All > Display > Support.1585146780731-890.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.