Prismatic joint definition

@EDGE_NAME {EdgeName}
@COMMENTS {CommentText}


  1. A prismatic joint is a constraint element that allows the relative displacement of two bodies along a specific body attached axis, see fig. 1. The prismatic joint is associated with an edge, EdgeName. Vertices Vertex0Name and Vertex1Name are associated with this edge. Find more information about: the representation of multibody systems, and the formulation of constraints in multibody systems.
  2. Figure 1. Configuration of a prismatic joint.
  3. The geometry of the prismatic joint is inherited from edge, EdgeName, which must have an associated triad, TriadName. The relative displacement of the two bodies is allowed along the third axis of this triad only.
  4. The relative displacement element, PruName, gives access to the relative displacement, Δ, at the prismatic joint.
  5. It is possible to attach comments to the definition of the object; these comments have no effect on its definition.

Graphical parameters

  1. The appearance of the prismatic joint during the visualization phase of the analysis can be controlled by associating visualization parameters, VizPrmName, to the element.
  2. The following representations are valid for prismatic joints: RprType = SYMBOL or TRIAD. The SYMBOL representation depicts the prismatic joint as a symbol centered at the point that defined the element. The TRIAD representation depicts the prismatic joint as two triads sharing a common origin and oriented according to the configuration of the two bodies connected to the joint. Default value: SYMBOL. No vector fields can be associated with prismatic joints.


Sensors can be defined to extract information about prismatic joints.

  1. The following SensorType and associated FrameName specifications are allowed for prismatic joints: ACCELERATIONS_0, ACCELERATIONS_1, DISPLACEMENTS_0, DISPLACEMENTS_1, CONFIGURATION_0, CONFIGURATION_1, VELOCITIES_0, and VELOCITIES_1. (Default value: DISPLACEMENTS_0).
  2. No u value or v value are accepted for prismatic joints.