Buckling is the failure of a structural member when subjected to a high compressive stress. Buckling occurs on a long thin column even when the compressive stress is below the material's ultimate compressive stress. Once the geometry has started to deform, it can no longer withstand a fraction of the initial force. Use buckling analysis to determine if a specified set of loads cause buckling and to find the shape of the buckling mode. You can then design supports or stiffeners to prevent local buckling.
The software is calculating linear or eigenvalue-based buckling.
The following list contains a few examples that Structural Buckling analyses might be appropriate: