Connect a rigid link to a flexible beam element

[Roger Bergua]

Hi all,

I'm relatively new using Project Chrono and I'm struggling trying to connect a rigid link to a flexible beam element (fea). I have reduced the problem to an easy example to reproduce this.

I'm using a simple cantilever beam. I am able to clamp the lowest node. But when I try to include a rigid link to connect a lumped mass at the free end of the beam, I run into problems with the dynamic solver: HHT: Reached minimum allowable step size. For reference, the static solver runs without issues. I guess I'm not using the proper element to connect to a fea element (?)

Attached you can find the schematic representation of the system and the model in pyChrono.

Any hint on how to do this would be great. Thanks for the support!