Linear buckling analysis referencing a nonlinear CNTNLSUB solution

Aleksandr Breit_21922

Hello,

I am trying to run a linear buckling solution which references a nonlinear static subcase. However, the nonlinear static subcase uses CNTNLSUB to continue results from another nonlinear static case that applies a preload to certain components.

It appears that the linear buckling solution is ignoring the "preload" entirely and is producing identical results if I have the preload turned as if I have it turned off.

Would anybody happen to know why or if I am missing something? Thank you for the help.

almeidaaap

You will need to keep the "preload" at the new load step that are using the "preload" step. So if you are using:
1) Pretension, you will need to load the pretension at the second load step and check the CNTNLSUB too, using as reference the "preload" load step;

2) Just a preload, you will need to create a new load collector using LOADADD ("preload" + load2) option, use this load collector as the load in the combined load step ("preload" + load2) and check the CNTNLSUB using the "Preload" load step as reference.