10-16-2010, 01:17 PM
The concept of the "Master-Slave" facility is that the slave node will deflect as it's master node. Precisely speaking, if the master sustains a rigid rotation of theta, the slave will undergo a displacement of the value of the translational displacement of the master plus R* sin (theta) – where R is the distance between the master and the slave. Thus, when you model a rigid link via master-slave it is important to know, which node will primarily be displaced due to the loads applied and which will follow the former due to rigidity in connection. The former should be specified as master and the nodes following it should be specified as slaves. Thus, a specification of master-slave would need an understanding of the deflection pattern of the model under the loads.