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Displacements Overview

The options in the Displacements menu in the RS2 Model program, are used to specify:

  • the displacement boundary conditions (restraints) for the model
  • other displacement related analysis options

The following options are available.

Displacement Boundary Conditions (Restraints)

The following options are used to apply displacement boundary conditions to the model.

  • Restrain XY (i.e. pinned)
  • Restrain X (i.e. free to move in the Y direction only)
  • Restrain Y (i.e. free to move in the X direction only)
  • Restrain Normal (i.e. restrained normal to the boundary but free to move tangential to the boundary)
  • Free (i.e. free in both X and Y directions)
  • Auto Restrain Surface / Underground - shortcuts to apply default external boundary restraints to underground or surface models
  • A fixed, non-zero displacement can be applied as a boundary condition using the Set Displacement option.
  • Infinite Elements can be used on the External boundary. This is set in the Default External boundary condition dialog.

Reset All Displacements

The Reset All Displacements option allows you to reset all calculated displacements to zero after any stage of a multi-stage model. This option can be used to filter out displacements that are not of interest, to provide a known reference state. For example, the initial displacements which are calculated in the first stage of a surface excavation model, where the first stage is used to "settle" the model under it's own weight.

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