Specifies the node number on the tank surface at the point where the nozzle intersects the tank shell.
This is optional. If you do not specify one, then the nozzle node is connected by the stiffnesses to a point fixed rigidly in space. If you type this value, then the nozzle node is connected by the stiffnesses to the tank node.
Specify the tank node when you want to model through the tank from the nozzle connection to the foundation.