Individual skill

calculix-sizing-optimization

Workflow skill for two-stage sizing/parameter optimization on a CalculiX shell or beam deck via the optimize_structure tool — Latin Hypercube sweep plus coordinate descent to minimize mass subject to stress/displacement or natural-frequency constraints by tuning scalar section/material/load cards. Use when an agent must lighten a CalculiX shell or beam model while keeping stress and deflection within limits, or must thin a deck until its first modes clear a resonance floor (freq_1_hz constraint on a *FREQUENCY deck).

Skill/calculix/calculix-sizing-optimization/SKILL.md

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# CalculiX Sizing Optimization

Two-stage **sizing/parameter** optimization: minimize mass subject to stress,
displacement, or natural-frequency constraints by editing scalar design
variables in place (shell thickness, beam section, material E/nu/density, load
magnitude). The mesh and geometry never change — only scalar cards.

This is **sizing optimization, not topology optimization**. It thins sections;
it does not redistribute material in space.

## When to Use

Use when an agent must lighten a CalculiX **shell or beam** model while keeping
von Mises stress and displacement within limits (static deck), or must lighten