The OpenSees Community

The modes dictate which directions get the target damping ratios. All the other modes get whatever according to the damping spectrum.

That's coming from the eigenvalue solver (DSAUPD), not sure why though.

No, but here's the list of accepted parameter strings:
https://github.com/OpenSees/OpenSees/bl ... .cpp#L1164

If you have doubts, perform simple analyses and check reactions and other easily verifiable responses.

That should work

No units are assigned, you are responsible for units. Translational springs in two node link elements provide a relationship between force and deformation. Rotational springs - moment and rotation.

You can ignore that warning

I didn't see that. You'll have to figure out what's going on. Start with simple models and build up from there.

I see. Your model has no mass.

There is an error in your model definition, e.g., insufficient boundary conditions or floating nodes.

Your vecxz is parallel to the x-axis of the element

https://portwooddigital.com/2020/08/08/ ... x-z-plane/

You may want to try a virtual machine with OpenSeesSP already pre-compiled for Tcl and Python:
https://secondsees.com/opensees-ami-usage-instructions/

Even though it runs on LInux, you can access the virtual machine from Windows.

Check your boundary conditions and nodal fixities. You have a rigid body mode in your model.

https://portwooddigital.com/2021/09/12/ ... -to-solve/

It's likely sendSelf and recvSelf are not implemented for that material. You can inquire with the developer.

Which material model in the layered shell elements?