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. Kill and choke lines Line and segment