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Add Uniform Load

Uniform loads can be applied by

- Defining projection shape (Add Load option)

- selecting faces, edges, or vertices of geometry (Add Load to Selected)

(faces, edges, or vertices) with the Add Load option and specifying Uniform Load as the Load Type.

Uniform distributed load on crest of slope

Uniform Distributed Load on Crest of Slope

To add a Uniform Load by projecting a region onto geometry:

  1. Select the Loading & Support Loading and Support Tab workflow tab.
  2. Select Add Loads Add Load Icon from the toolbar or the Loading menu.
  3. You will see the Add Load dialog. In this dialog:
      • Select the Load Type = Uniform Load
      • Enter the load Magnitude and specify the load Orientation (e.g. Normal, Local +x, Local +y, Local +z, Vector (x,y,z), or Trend/Plunge) specify shape and and dimension of the load region
      • Specify location and orientation of the load region
  4. See below for details about the load magnitude and orientation.

  5. When finished specifying the load properties and preview of the applied load, select OK. The Uniform Load will be applied to faces, below load region.
  6. Check the direction of the arrows and the magnitude, to make sure that this is the load you wished to apply. If there is a mistake, you can select Undo and repeat the above steps to apply the correct load, or select and edit the load using the Properties pane to change the load parameters.

To add a Uniform Load to a face:

  1. Select the Loading & Support Loading and Support Tab workflow tab.
  2. Select Faces Selection Cube Front Face Icon as the Selection Mode.
  3. Select the face(s) on which to apply the load.
  4. Select Add Loads to Selected Add Loads to Selected Icon from the toolbar or the Loading menu.
  5. TIP: with the face(s) selected, you can also right-click on the viewing screen and select Add Loads from the Loading sub-menu.

  6. You will see the Add Load dialog. In this dialog:
      • Select the Load Type = Uniform Load
      • Enter the load Magnitude and specify the load Orientation (e.g. Normal, Local +x, Local +y, Local +z, Vector (x,y,z), or Trend/Plunge)
  7. See below for details about the load magnitude and orientation.

  8. When finished specifying the load properties and the preview of the applied load, select OK. The Uniform Load will be applied to the selected face(s), as indicated by the display of red arrows and the magnitude.
  9. Check the direction of the arrows and the magnitude, to make sure that this is the load you wished to apply. If there is a mistake, you can select Undo and repeat the above steps to apply the correct load, or select and edit the load using the Properties pane to change the load parameters.
To apply a Uniform Load to an edge (uniform line load) or vertex (point load) repeat the Steps 1 to 7, but use Edges Selection Cube Edge Icon or Vertices Selection Cube Vertex Icon to select the edge(s) or vertices, respectively, on which to apply the load.

Load Magnitude

A distributed load magnitude is generally entered as a positive value. The direction of load application is specified by selecting an appropriate Orientation method (see below) in the Add Load dialog. If a negative load magnitude is entered, the direction of the applied load will be reversed.

Load Orientation

The load Orientation may be specified using one of the following options:

  • Normal - loads are applied normal to the boundaries
  • Local +x - loads are applied to the boundaries in the positive x-direction (i.e. +x)
  • Local +y - loads are applied to the boundaries in the positive y-direction (i.e. +y)
  • Local +z - loads are applied to the boundaries in the positive z-direction (i.e. +z)
  • Vector (x,y,z) - specify a vector from the x, y, and z-directions
  • Trend/Plunge - specify a trend and plunge (see Sign Convention for more information)

Flip Orientation

While adding a load, the orientation may sometimes be opposite from the intended direction (i.e. 180 degrees off). If this occurs you can select the Flip checkbox in the Add Load dialog to reverse the orientation of a load. After a load has been added, you can select the load in the Visibility pane and use the Properties pane Flip Orientation checkbox to reverse the load orientation.

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