orcawave-qtf-analysis-when-to-use-full-qtf-vs-newman

name	orcawave-qtf-analysis-when-to-use-full-qtf-vs-newman
description	Sub-skill of orcawave-qtf-analysis: When to Use Full QTF vs Newman (+2).
version	1.0.0
category	engineering
type	reference
scripts_exempt	true

When to Use Full QTF vs Newman (+2)

When to Use Full QTF vs Newman

Scenario	Recommendation
Initial design	Newman approximation
Mooring design	Full QTF
Shallow water (d < 100m)	Full QTF required
Deep water (d > 300m)	Newman often sufficient
Bi-directional seas	Full QTF
Long-crested seas	Newman acceptable
SPM/turret systems	Full QTF

Computational Considerations

1. Frequency Resolution: Use 20-30 frequencies minimum for accurate QTF
2. Heading Pairs: Exploit symmetry to reduce computation
3. Memory: Full QTF matrices can be large; consider frequency range
4. Validation: Compare Newman vs Full for at least one condition
5. Mesh Quality: QTF more sensitive to mesh than first-order

Integration with Mooring Analysis

from digitalmodel.orcawave.qtf import QTFMooringIntegration

# Prepare QTF for mooring analysis
integration = QTFMooringIntegration()

# Load QTF results
integration.load_qtf("results/qtf/fpso_full.yml")

# Convert to mooring analysis format
integration.export_for_mooring_analysis(
    output_file="mooring/qtf_loading.yml",
    format="OrcaFlex",
    include_mean_drift=True,
    include_slow_drift=True,
    sea_state={
        "hs": 4.0,
        "tp": 10.0,
        "gamma": 3.3
    }
)