Diffraction Analysis
How this report works
This page renders live from the public, de-identified Hugging Face dataset aceengineer/digitalmodel-diffraction-rao via the datasets-server API — no result values are baked into the page. Vessels are referenced only by de-identified vessel_db IDs. Pick a program, vessel and damping ratio above, or deep-link with ?solver=<AQWA|OrcaWave>&vessel=<vessel_id>&damping=<zeta_pct>.
Data contract & provenance
| Dataset | — |
| Tables used | rao · hydrostatics (also the series catalog) |
| Series filter (where) | — |
| Rows fetched | — |
| Dataset last modified | — |
| Dataset revision (sha) | — |
| License | — |
| Fetched at | — |
What this analysis is
Potential-flow diffraction analysis: the vessel's six-degree-of-freedom motion response amplitude operators (RAOs) across wave frequency and heading. Results are screening-grade — faithful to the solver, de-identified, and not a class-approved design basis. Key results below are computed in-browser from the fetched rows.
Model and analysis basis
The basis below is auto-detected from the fetched rows; solver attribution and modelling notes follow the dataset card.
Hydrostatics
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Data-quality & reliability flags
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Six-DOF RAO summary
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Per-DOF response
Amplitude vs wave period, one trace per heading. Headings 0/45/90/135/180° are shown by default — click legend entries to toggle others. Phase plots are collapsed beneath each DOF.
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Interpretation notes
- Damping treatment matters for roll: a series with ζ = 0 % carries no external/viscous roll damping — its roll-resonance peak is an undamped potential-flow upper bound, not an operability prediction. Apply an external roll damping model before operational use.
- Frequency-band scope: some series are published on a focused band (e.g. refined around the roll-response band); absence of rows outside the band is by scope, not omission.
- Reliability flags travel with the data: rows flagged non-ok (e.g. undamped_resonance, low_freq_artifact) should be excluded from downstream use; definitions are on the dataset card.
- Phase conventions: published phases use the Orcina lag convention (the export pipeline normalizes) — verify before phase-level cross-tool comparison.
- See the dataset card for per-vessel data-quality notes and withheld tables. Cross-solver benchmarking lives in the comparison report.