Rigid body connection definition

@EDGE_NAME {EdgeName}
@SHAPE_NAME {ShapeName}
@COMMENTS {CommentText}


  1. A rigid body connection is a holonomic constraint element that is associated with an edge EdgeName. Vertices Vertex0Name and Vertex1Name are associated with this edge. The rigid body connection enforces the motion of two points to be compatible with that of two points belonging to a single rigid body, as shown in fig. 1. Find more information about: the representation of multibody systems, and the formulation of constraints in multibody systems.
  2. Figure 1. Configuration of a rigid body connection.
  3. An external shape ShapeName can be optionally defined for the associated rigid body. This external shape is exclusively used in the visualization post-processor and has no effect on the analysis procedure.
  4. 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 associated rigid body connections during the visualization phase of the analysis can be controlled by associating graphical parameters GrfParamName to the element.
  2. The following representations are valid for rigid body connections: RprType = MESH, SURFACE, SYMBOL or TRIAD. The TRIAD representation depicts the rigid body with a triad. The SYMBOL representation depicts the rigid body connection as a box symbol. The other two representations are allowed only if a shape ShapeName is defined for the rigid body connection; SURFACE shows the shape as an outer surface of the body, and MESH depicts the shape as an orthogonal mesh of curves. Default value: SURFACE if a ShapeName is defined, SYMBOL otherwise.


  1. Sensors can be defined to extract information about rigid body connections. The following SensorType and associated FrameName specifications are allowed for rigid body connections: ACCELERATIONS_0, ACCELERATIONS_1, DISPLACEMENTS_0, DISPLACEMENTS_1, POSITIONS_0, POSITIONS_1, VELOCITIES_0, and VELOCITIES_1. (Default value: DISPLACEMENTS).
  2. No u value or v value are accepted for rigid body connections.