AceEngineer · digitalmodel · live dataset report

Diffraction Comparison

diffraction reports · dataset aceengineer/digitalmodel-diffraction-rao LOADING

Series A Program Vessel ζ (%) Series B Program Vessel ζ (%) Compare any two published series — across program, vessel or damping ratio. The list comes live from the dataset; the URL updates with your selection for bookmarking/sharing.

Series & availability

Series	Program	Vessel (vessel_db ID)	ζ (%)	Filter (where)	Rows	Status

Data contract & provenance

Dataset	—
Tables used	rao · hydrostatics (series catalog)
Dataset last modified	—
Dataset revision (sha)	—
License	—
Fetched at	—

Comparison method

Magnitudes only by default. Phase comparison requires an explicit convention alignment and is out of scope for the automatic statistics below.

Delta statistics are computed on the overlapping period band of the two series: series B is linearly interpolated in period onto series A's grid at each common heading. Peak deltas compare each series' own peak within the overlap band. Percentage deltas are reported relative to series A and are suppressed where |A| < 5 % of A's peak (to avoid noise-dominated ratios near zero crossings). Rows carrying a non-ok reliability flag (e.g. an undamped resonance band) are plotted but excluded from all automatic statistics, including the peak table.

Compare like with like. This page will compare any two series you select — it is up to you to keep the comparison meaningful. Mismatched damping, different vessels, or non-overlapping frequency bands are banner-flagged so a difference is attributed to the right cause (solver vs damping vs hull).

Peak comparison (all headings, reliability=ok rows)

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Per-DOF overlay & deltas

Heading: Overlay and delta statistics recompute for the selected heading.

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Interpretation notes

Solver benchmark (same vessel, same ζ, different program): differences are usually driven by mesh, restoring/GM basis and moonpool handling — not the potential-flow formulations.
Damping sensitivity (same vessel and program, different ζ): roll-resonance response scales strongly with damping; off-resonance response barely moves.
Cross-vessel comparisons reflect hull differences, not solver agreement.
Results are screening-grade and de-identified; see the dataset card for per-vessel data-quality notes. Single-series detail lives in the analysis report.