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

[simon.paajarvi]

The *ELEMENT_BEARING seems to be limited to a rolling element bearing, but the numerical study you provided gave me a good idea how to apply unbalance forcing. :-)

The example you found from ANSYS is exactly what I am trying to achieve in LS-DYNA. The reason for choosing LS DYNA is that the final objective is to implement impact-rub simulations for the rotor, which seems to be a limiting factor for more specialized, rotordynamic modules available in e.g. ANSYS, NX NASTRAN, etc. They have very good capabilities for the rotordynamic simulations (e.g. bearing modeling, unbalance loads, etc) but do often not support contacts.

From your input, I think the superelement is the most suitable option. Do you perhaps have any accessible tutorials or examples for this? The manual does not describe a lot when it comes to the application.