Block Format Keyword Defines cylindrical joints.


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node_ID1 node_ID2 grnd_ID              


Field Contents SI Unit Example
joint_ID Joint identifier

(Integer, maximum 10 digits)

unit_ID Unit Identifier

(Integer, maximum 10 digits)

joint_title Joint title.

(Character, maximum 100 characters)

node_ID1 Node identifier N1.


node_ID2 Node identifier N2.


grnd_ID Node group identifier.




  1. A cylindrical joint behaves like a rigid body; except for the translational DOF in a variable direction and the rotational DOF around this direction.
  2. The direction is defined by node_ID1 and node_ID2.
  3. node_ID1 and node_ID2 belong to the cylindrical joint.
  4. At each time step, the center of mass and moment of inertia of the joint are computed.
  5. The grnd_ID input is obligatory. The cylindrical joint will only be applied to nodes belonging to a node group.