The Eigenvalue Buckling system predicts the theoretical buckling strength of an ideal elastic structure. This method corresponds to the textbook approach of elastic buckling analysis; for instance, an Eigenvalue Buckling analysis of a column matches the classical Euler solution. However, imperfections and nonlinearities prevent most real-world structures from achieving their theoretical elastic buckling strength. The Eigenvalue Buckling analysis often yields quick but non-conservative results.
This analysis is configured in Ansys Mechanical, using the Ansys or the Samcef solver to compute the solution.
An Eigenvalue Buckling analysis must follow a prestressed static structural analysis. Follow the instructions in Static Structural to build a prestressed Static Structural system, and then complete the following instructions to build and link an Eigenvalue Buckling system.
To work through an Eigenvalue Buckling system:
From the Static Structural system, right-click the Solution cell and select > .
A new Eigenvalue Buckling system is created, with the Engineering Data, Geometry, Model, and Setup cells linked from the static structural system.
To open the Mechanical application, from the Eigenvalue Buckling system, right-click the Setup cell and select from the context menu or double-click the Setup cell.
In the Mechanical application window, complete your analysis using the application's tools and features.
See Eigenvalue Buckling Analysis in the Mechanical User's Guide for more information on conducting this analysis.
On the Project tab toolbar, click .