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Boundary conditions > Using fields and expressions to define boundary conditions

Breakout modeling workflow

The typical workflow for breakout modeling is:

  1. Build a model of a structure, using a coarse mesh.

  2. Solve the model for displacements.

  3. Identify the portion of the model that you want to study further. Make a group of the nodes and elements to study.

  4. In Post processing, save results (for example, displacements) for the group to a .csv file. For more information, see Write identified data to a spreadsheet or CSV file.

  5. Create a new FEM that includes geometry that defines the nodes and elements in the group.

  6. Mesh the new model with a finer mesh.

  7. Create boundary conditions on the borders of the breakout model. For example, to define an enforced displacement, create a field that uses the displacement results from the original analysis.

  8. Solve the new model, and review the results.

How do I

Define a time-varying force with a formula field

Define a spatially-distributed force with a formula field

Define a spatial normal pressure load

Define a spatial pressure load in parameter space

Learn more

Using fields and expressions to define boundary conditions

Breakout modeling

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Breakout modeling workflow, Simcenter 3D 2021.1 Series

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Source: https://docs.sw.siemens.com/en-US/doc/289054037/PL20200601120302950.advanced/id623726 · retrieved 2026-07-17