How to run a buckling analysis


Learn how to perform a Buckling Analysis.

This article uses Simulation/Optimization and both of them in nTop have two requirements: FE Mesh and Boundary Conditions (BCs). Follow the instructions in the links below to prepare your model for simulation.

FE Mesh

Boundary Conditions (BCs)

1. Run a Buckling Analysis 

    • Add a Buckling Analysis block
    • Insert the FE Model into the Model input
    • Add the Force BC to the BC List input 
    • Press the '+' in the BC List to add another input
    • Insert the Restraint BC into the new input slot
    • Enter the Maximum Number of modes you wish to calculate.
    • You can bound the Min and Max eigenvalues, but it will return an error if there are no eigenvalues in that range.

Note: This is a linear buckling analysis. All inertial and damping forces are neglected. Using a Quadratic Geometric order FE Mesh with any analysis is recommended to get the most accurate results.


2. Reading the Results

Once you run an analysis, a Heads Up Display (HUD) will appear, showing the results. The HUD allows you to toggle through Total displacement and Displacement across X, Y, and Z axes.

  • The result of the buckling simulation (‘buckling load factor" property in the block’s properties) is a list of factors by which the model’s load(s) must be multiplied to reach the critical buckling load for each mode.
  • The results are ranked by the intensity of each mode, from high to low.


And that’s it! You’ve successfully run a buckling analysis

Are you still having issues? Contact the support team, and we’ll be happy to help!

Download the Example file:

More on this topic:


 analysis fea design displacement buckling value how-to eigen 
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