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FE Model, Load case, Integer, Scalar, Scalar

FE Model, Load case, Integer, Scalar, Scalar, 1.1.0

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About this Block

What it does: Calculates the critical buckling load factors and their corresponding mode shapes, for a given Simulation Model and set of Boundary Conditions. Common uses:
  • Understanding the buckling modes of your model.
Tips:
  • 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 by to reach the critical buckling load for each mode.
  • The results are ranked by the intensity of each mode, from high to low.
  • You can bound the minimum and maximum eigenvalues, but it will return an error if there are no eigenvalues in that range.
  • The loads are assumed to be applied slowly until the model reaches a state of equilibrium (static assumption), and the relationship between loads and displacements is assumed to be linear.
  • All inertial and damping forces are neglected.
  • Boundary conditions must contain a displacement restraint for at least one node. Otherwise, the model isn’t fixed in space.
  • When the calculation is complete, a Head’s Up Display (HUD) will appear that allows you to visualize the block’s results. The block’s visibility must be on to see the results window.
  • This is a linear buckling analysis.
  • It is recommended to use a Quadratic Geometric order FE Mesh with any analysis to get the most accurate results.

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Example File

Download Example: Buckling Analysis Example Screenshot

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FE Model, Load case, Integer, Scalar, Scalar

Calculate the critical buckling loads and buckling mode shapes of an FE Model subject to prescribed boundary conditions. The resulting eigenvalues are factors by which the load must be multiplied to reach the critical buckling load for that mode.

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Inputs

NameTypeDescription
ModelFE ModelThe finite element model.
Load caseBoundary Condition ListThe restraints and applied loads.
Number of modesIntegerMaximum number of modes to calculate.
Min eigenvalueScalarLower bound of returned eigenvalues.
Max eigenvalueScalarUpper bound of returned eigenvalues.

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Outputs

Type
Buckling Result

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FE Model, Load case, Integer, Scalar, Scalar, 1.1.0

Calculate the critical buckling loads and buckling mode shapes of an FE Model subject to prescribed boundary conditions. The resulting eigenvalues are factors by which the load must be multiplied to reach the critical buckling load for that mode.

​
Inputs

NameTypeDescription
ModelFE ModelThe finite element model.
Load caseBoundary Condition ListThe restraints and applied loads.
Number of modesIntegerMaximum number of modes to calculate.
Min eigenvalueScalarLower bound of returned eigenvalues.
Max eigenvalueScalarUpper bound of returned eigenvalues.

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Outputs

Type
Buckling Result