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Constrain beam and rigid element

Constrain beam and rigid element

Constrain beam and rigid element

(OP)
Good day!

I am trying to model a shaft with three rigid blades attaches in the middle of the shaft like so.



As you can see I was able to model the blades as beam elements (picture is rendered, that is why beam have cross-sections). To assemble the model using "Tie" constraint and it all behaved well.

My goal was to model blades as rigid and I did so. This is when I got a bit lost. I had to assign the reference point for each rigid body, and I did so. After that I tried to "Tie" all three blades to the node in the middle of the shaft (as i did for blades modeled as rigid) and i get this error: (Error in job rot: 2 nodes are used more than once as a slave node in *TIE keyword. These constraints are not removed either due to the presence of *CONSTRAINT CONTROLS,NO CHANGES keyword or because removing the constraints might affect the model. The nodes have been identified in node set ErrNodeOverconTieSlave.)

Thanks for your time and help.

Kev

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