How to ensure that the rotation and displacement of two nodes are the same?

[Adehyl]

In the 3D model, I built two elasticbeamcolumn elements (ELE1: node1, node2; ele2, node3, node4) I want to keep the rotation and displacement of node1 and node3 the same. After checking the command, I feel that "equaldof * * 1233456" and "rigidlink beam" command seems to be able to meet my needs. At the same time, after I looked at the forum, someone suggested that the elasticbeamcolumn element with large stiffness should also meet the requirements. I would like to ask you, will the above three methods achieve the same results? I would also like to ask about the applicable conditions of the above three methods。

This is very important to me, thank you for your answers!

[mhscott]

Well, try them out and see if they give the same results

[selimgunay]

They would give the same result, but equaldof or the rigidlink is preferrable, because the elasticbeamcolumn element with large stiffness is more likely to cause numerical issues

[Adehyl]

They would give the same result, but equaldof or the rigidlink is preferrable, because the elasticbeamcolumn element with large stiffness is more likely to cause numerical issues

Thanks a lot!