How can I set the retained and constrained nodes of the rigid links so that the simplification shown in the following picture can be achieved?
![Image](https://i.loli.net/2021/10/08/DPlZnE5vfK4X368.jpg)
I did it like this:
rigidLink beam 1 2
rigidLink beam 1 3
rigidLink beam 4 5
rigidLink beam 6 7
rigidLink beam 5 8
rigidLink beam 7 8
the bears are simulated by zerolength elements, equaDOF command is used:
equaDOF 2 4 3 4 5 6
equaDOF 3 6 3 4 5 6
but the response of the structure turned out to be incorrect. Can anybody help me with this?