Using superelements in an assembly FEM

In Pre/Post, you can replace individual components in your assembly FEM with external superelements to define a system model.

Note:

Pre/Post fully supports only external superelements created with Simcenter Nastran version 8 (or above), or with Simcenter Samcef V18 (or above).

To replace a component in your assembly FEM with an external superelement, you modify the component attributes to reference the binary results file:

• *_O.op2 from a Simcenter Nastran SOL101 Superelement or SOL103 Superelement analysis.

• .u18/.sdb from a Simcenter Samcef Superelement Creation analysis or Simcenter Nastran SOL 414,103 Eigenvalues and Superelement Reduction in a rotor dynamics analysis.

You can replace multiple instances of a component in the assembly FEM with the same superelement.

Using external superelements, you can reduce the number of DOFs (and consequently the number of equations) to a manageable number in an arbitrarily large model.

Top: A system model. (1) The residual (nodes and elements). (2) Substructures (external superelements).

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Using superelements in an assembly FEM, Simcenter 3D 2021.1 Series

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