OrcaWave 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. Select a different published series with URL parameters: ?vessel=<vessel_id>&damping=<zeta_pct>.

Data contract & provenance

What this analysis is

Potential-flow diffraction analysis in Orcina OrcaWave: the vessel's six-degree-of-freedom motion response amplitude operators (RAOs) across wave frequency and heading, with phases in the Orcina lag convention. 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

Data-quality & reliability flags

Six-DOF RAO summary

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.

Interpretation notes

• Damping treatment matters for roll: lightly damped series show high roll peaks at resonance — a real, expected consequence of light damping, not a solver artifact. Compare like with like (same ζ) when benchmarking.
• Reliability flags travel with the data: rows flagged non-ok (e.g. low_freq_artifact) should be excluded from downstream use; definitions are on the dataset card.
• Phases use the Orcina lag convention — align conventions before comparing phases against other solvers.
• See the dataset card for per-vessel data-quality notes and withheld tables.