Result Combinations [FEA]

Result Combinations holds the objects that turn raw analysis output into the values a design check needs. Everything here is result-time post-processing - none of it re-analyses the model.

Combinations & Envelopes factor and sum cases into design combinations, or envelope alternatives where the governing case varies by location. Combination Items express the individual case-and-factor pairs, and are the better route for anything non-trivial.

FE Composites merge the forces of several elements onto one section at its centre of gravity, which is what a section capacity check requires when a girder is modelled with separate shell and beam elements. Concurrent Force/Displacement Requests report one quantity at the instant another is at its extreme - the pairing an interaction check needs, and one that envelopes cannot provide.

Equivalent Stiffness condenses a region of the model into a single 6x6 stiffness matrix for handing to another model.

One rule governs this whole branch: combination by superposition is valid for linear results only.