How do I install the Orcawave Analysis Orcfxapi Result Extraction skill?

Run npx skillmds@latest add vamseeachanta/orcawave-analysis-orcfxapi-result-extraction in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Orcawave Analysis Orcfxapi Result Extraction skill do?

Sub-skill of orcawave-analysis: OrcFxAPI Result Extraction (+3). It is listed under Coding & Dev Tools on SkillMD.

Is Orcawave Analysis Orcfxapi Result Extraction safe to use?

SkillMD's automated safety review verdict for this skill is PASS. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Orcawave Analysis Orcfxapi Result Extraction?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Orcawave Analysis Orcfxapi Result Extraction free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Orcawave Analysis Orcfxapi Result Extraction?

vamseeachanta (@vamseeachanta) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Orcawave Analysis Orcfxapi Result Extraction by vamseeachanta

Name: Orcawave Analysis Orcfxapi Result Extraction
Author: vamseeachanta

File contents

OrcFxAPI Result Extraction (+3)

OrcFxAPI Result Extraction

Property	Gotcha	Fix
`.frequencies`	Returns Hz, not rad/s	Multiply by `2 * np.pi`
`.frequencies`	Returns descending order	`np.argsort()` ascending before comparison
`.displacementRAOs`	Shape `(nheading, nfreq, 6)`	Transpose to `(nfreq, nheading, 6)`
Rotational RAOs (indices 3,4,5)	In rad/m	`np.degrees()` for deg/m (AQWA convention)
`.addedMass`, `.damping`	Follow frequency order	Apply same sort index as frequencies

Unit Conversion: WAMIT .frc → spec.yml

Source	Mass Unit	Inertia Unit	Density	To spec.yml
WAMIT `.frc` (RHO=1)	te	te·m²	1 te/m³	×1000 for kg, kg·m²
OrcaWave `.owd`	te	te·m²	1 te/m³	×1000 for kg, kg·m²
spec.yml	kg	kg·m²	kg/m³	— (canonical)

TRAP: When porting from WAMIT .frc to spec.yml, multiply inertia by 1000 (te·m² → kg·m²). Do NOT multiply twice — the ISSC TLP case 2.5 had inertia tensors 1000× too large (8.02e13 vs correct 8.02e10) from double conversion.

Phase Correlation for Zero-Magnitude DOFs

Fixed DOFs (e.g. heave/roll/pitch on TLPs) produce zero RAO magnitudes. Phase is undefined (atan2(0,0) noise), so:

multi_solver_comparator.py: when peak_mag < 1e-10, overrides phase correlation to r = 1.0
validate_owd_vs_spec.py: skips DOFs with max_diff < 1e-6 in pass/fail verdict

QTF Settings Guard

When qtf_calculation: false in spec.yml, do NOT include any QTF-related keys in the OrcaWave YAML:

QTFMinCrossingAngle, QTFMaxCrossingAngle, PreferredQuadraticLoadCalculationMethod
These cause "Change not allowed" errors from OrcaWave
QuadraticLoadPressureIntegration: No is safe (explicitly disabling)

---name: orcawave-analysis-orcfxapi-result-extractiondescription: Sub-skill of orcawave-analysis: OrcFxAPI Result Extraction (+3).---# OrcFxAPI Result Extraction (+3)## OrcFxAPI Result Extraction| Property | Gotcha | Fix ||----------|--------|-----|| `.frequencies` | Returns **Hz**, not rad/s | Multiply by `2 * np.pi` || `.frequencies` | Returns **descending** order | `np.argsort()` ascending before comparison || `.displacementRAOs` | Shape `(nheading, nfreq, 6)` | Transpose to `(nfreq, nheading, 6)` || Rotational RAOs (indices 3,4,5) | In **rad/m** | `np.degrees()` for deg/m (AQWA convention) || `.addedMass`, `.damping` | Follow frequency order | Apply same sort index as frequencies |## Unit Conversion: WAMIT .frc → spec.yml| Source | Mass Unit | Inertia Unit | Density | To spec.yml ||--------|-----------|-------------|---------|-------------|| WAMIT `.frc` (RHO=1) | te | te·m² | 1 te/m³ | ×1000 for kg, kg·m² || OrcaWave `.owd` | te | te·m² | 1 te/m³ | ×1000 for kg, kg·m² || spec.yml | kg | kg·m² | kg/m³ | — (canonical) |**TRAP**: When porting from WAMIT `.frc` to spec.yml, multiply inertia by 1000 (te·m² → kg·m²). Do NOT multiply twice — the ISSC TLP case 2.5 had inertia tensors 1000× too large (8.02e13 vs correct 8.02e10) from double conversion.## Phase Correlation for Zero-Magnitude DOFsFixed DOFs (e.g. heave/roll/pitch on TLPs) produce zero RAO magnitudes. Phase is undefined (`atan2(0,0)` noise), so:- `multi_solver_comparator.py`: when `peak_mag < 1e-10`, overrides phase correlation to `r = 1.0`- `validate_owd_vs_spec.py`: skips DOFs with `max_diff < 1e-6` in pass/fail verdict## QTF Settings GuardWhen `qtf_calculation: false` in spec.yml, do NOT include any QTF-related keys in the OrcaWave YAML:- `QTFMinCrossingAngle`, `QTFMaxCrossingAngle`, `PreferredQuadraticLoadCalculationMethod`- These cause "Change not allowed" errors from OrcaWave- `QuadraticLoadPressureIntegration: No` is safe (explicitly disabling)---

Frequently asked questions

Orcawave Analysis Orcfxapi Result Extraction