Mode shape (unconstrained) result
The Mode shape (unconstrained) result shows the shape of the buckled component with automatically generated constraints that are applied to eliminate rigid motion, but which do not inhibit the free deformation of the component. Various mode shapes can occur at different load factors.
These mode shapes are also known as eigenmodes. The buckling analysis does not calculate actual displacements for such a mode shape. The mode shape is simply an arbitrarily scaled set of displacements.
Using this result
The eigenvalue associated with the buckling mode is displayed in the legend. The eigenvalue represents the factor by which the applied load, in the case of Stress analysis, or the internal loads in the case of Warp analysis, must be multiplied in order to induce this buckling mode. If this eigenvalue is less than one it means that the part will buckle with less than 100% of the applied load.
Step Forward to view each mode shape in turn if the analysis has output more than one eigenvalue.