aqwa-analysis

name	aqwa-analysis
description	Integrate with AQWA hydrodynamic software for RAO computation, damping analysis, and coefficient extraction. Hub skill — delegates to aqwa-input, aqwa-output, aqwa-reference for details.
type	reference
version	4.0.0
updated	"2026-03-16T00:00:00.000Z"
category	engineering
triggers	["AQWA analysis","RAO extraction","added mass calculation","damping coefficient","wave diffraction","radiation analysis","AQWA-LINE","AQWA-DRIFT","AQWA-LIBRIUM","AQWA-NAUT"]
capabilities	[]
requires	[]
see_also	["aqwa-input","aqwa-output","aqwa-reference"]
tags	[]
scripts_exempt	true

AQWA Analysis Skill

Hub for ANSYS AQWA hydrodynamic analysis — RAO computation, added mass/damping extraction, coefficient management.

When to Use

• RAO (Response Amplitude Operator) computation
• Hydrodynamic coefficient extraction (added mass, damping)
• Viscous damping determination
• Diffraction/radiation analysis (AQWA-LINE)
• Time domain motions (AQWA-DRIFT)
• Stability analysis (AQWA-LIBRIUM)
• Cable dynamics (AQWA-NAUT), coupled analysis (AQWA-WAVE)

Prerequisites

• Python environment with digitalmodel package
• AQWA output files (LIS, DAT, or MES format)
• For running AQWA: ANSYS AQWA license

Industry Standards

• DNV-RP-C205 (Environmental Conditions)
• API RP 2SK (Stationkeeping)
• ISO 19901-7 (Mooring Systems)
• IEC 61400-3 (Wind Turbines)

Python API

RAO Extraction

from digitalmodel.aqwa.aqwa_raos import AqwaRAOs

raos = AqwaRAOs()
raos.load("aqwa_results/vessel.LIS")

surge_rao = raos.get_rao(motion="surge", wave_direction=180.0)
rao_df = raos.to_dataframe()

raos.plot_rao(
    motions=["heave", "pitch", "roll"],
    directions=[0, 90, 180],
    output_file="results/rao_comparison.html"
)
raos.export_orcaflex("vessel_raos.yml")

Analysis Router

from digitalmodel.aqwa.aqwa_analysis import AqwaAnalysis

aqwa = AqwaAnalysis()
cfg = {
    "aqwa": {
        "input_file": "aqwa_results/vessel.LIS",
        "extract": ["raos", "added_mass", "damping", "drift_forces"],
        "output_directory": "results/"
    }
}
results = aqwa.run(cfg)