So the eigenvalue buckling analysis of an FE model isn't responding the way I expected it to based on some Euler buckling calcs. I want to check it via more detailed hand calcs (ie eigenvalue analysis and direct stiffness method) but have little to no idea about how to go about doing it.
Are...
So I'm trying to model a column with 4 rigid links for a buckling analysis. The overall structure is simply supported and there is also a linear spring at the middle joint. Each of the rigid links are connected to the one below via a rotational spring. I attached the model for reference...
