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Solver 401

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Nikki24

Marine/Ocean
Nov 20, 2022
3
Hello everyone
I am trying to solve a problem with a changing boundary condition using solver 401. The first case - two beams are centered relative to each other (load by displacement), the second case - the load is removed, the beam nodes at the junction are connected by constraint equations.
The trouble is that only first case works. The second case give a mechanism error, I don’t understand why. Please check my model.

Thanks for all
 
 https://files.engineering.com/getfile.aspx?folder=fa63c312-009d-4c95-99df-ecbae73e2f35&file=Connecting_beam.modfem
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