1. Rigid supernode connections

In present version only to be applied for static and non-linear dynamic analysis.

This option enables the user to model rigid connections between supernodes. A rigid connection is modelled by specifying a master - and a slave node. Both the master and the slave have initially to be defined as free nodes. The theoretical formulation is a special application of linear constraints between degrees of freedom.

NRICON input lines.

CHMAST CHSLAV

  • CHMAST: character: Reference to supernode identifier, SNOD-ID, specified as the master node

  • CHSLAV: character: Reference to supernode identifier, SNOD-ID, specified as the slave node

Note that:

  • Both the master and the slave node have initially to be defined as free nodes.

  • A master node can not be slave of another master node.

  • A slave node can only be slave of one master node.

  • An arbitrary number of slave nodes can have the same master node.

  • The number of DOFs at the slave node must not exceed the number of DOFs at the master node.