Reply To: Cross-coupled stiffness elements in LS-DYNA

[Reno Genest]

Hello Simon,

I checked with a developer and he said: "superelements sounds reasonable, assuming small displacements. There is also the flexible body approach, *part_modes, but not sure how well this works".

Also, have you tried modeling your rotor dynamics with Ansys? There is a section in the help about rotor dynamics:

5.15.13. Rotordynamics Analysis

And bearings:

9.12. Bearings

"As required, define the stiffness coefficients (K11, K22, K12, K21) and the damping coefficients (C11, C12, C21, C22). These may be entered as Constant values or using Tabular Data entries."

 

I think this is exactly what you are trying to do.

 

Let me know how it goes.

 

Reno.