Agent skill
orcawave-multi-body
Multi-body hydrodynamic interaction analysis in OrcaWave. Use when setting up coupled vessel models, side-by-side operations, FPSO-tanker interactions, gap resonance studies, or hydrodynamic shielding calculations.
Install this agent skill to your Project
npx add-skill https://github.com/vamseeachanta/workspace-hub/tree/main/.claude/skills/engineering/marine-offshore/orcawave/multi-body
SKILL.md
Orcawave Multi Body
When to Use
- Side-by-side (STS) ship-to-ship transfer operations
- FPSO and offloading tanker interaction
- Multiple floating bodies in close proximity
- Gap resonance phenomenon investigation
- Hydrodynamic shielding effects
- Coupled vessel response analysis
- Multi-body mooring system design
Python API
Basic Multi-Body Setup
from digitalmodel.orcawave.multibody import MultiBodyAnalysis
# Initialize multi-body analysis
mb = MultiBodyAnalysis()
# Add primary vessel (FPSO)
mb.add_body(
name="FPSO",
mesh_file="geometry/fpso_panels.gdf",
*See sub-skills for full details.*
### Gap Resonance Analysis
```python
from digitalmodel.orcawave.multibody import GapResonanceAnalyzer
# Initialize gap resonance analyzer
gap = GapResonanceAnalyzer()
# Configure gap geometry
gap.configure(
vessel1="FPSO",
vessel2="Shuttle_Tanker",
*See sub-skills for full details.*
### Side-by-Side Operations
```python
from digitalmodel.orcawave.multibody import SideBySideAnalysis
# Initialize STS analysis
sts = SideBySideAnalysis()
# Configure vessels
sts.configure_fpso(
mesh="geometry/fpso.gdf",
loa=300.0,
*See sub-skills for full details.*
### Hydrodynamic Coupling Matrices
```python
from digitalmodel.orcawave.multibody import CouplingMatrixExtractor
# Extract coupling matrices
extractor = CouplingMatrixExtractor()
# Load multi-body results
extractor.load_results("results/multibody.owr")
# Get coupled added mass (12x12 for 2 bodies)
*See sub-skills for full details.*
### Shielding Effects
```python
from digitalmodel.orcawave.multibody import ShieldingAnalyzer
# Analyze wave shielding
shielding = ShieldingAnalyzer()
# Configure
shielding.load_multibody_results("results/multibody.owr")
# Compare sheltered vs exposed
*See sub-skills for full details.*
## Related Skills
- [orcawave-analysis](../orcawave-analysis/SKILL.md) - Single body diffraction
- [orcawave-mesh-generation](../orcawave-mesh-generation/SKILL.md) - Panel mesh creation
- [orcawave-to-orcaflex](../orcawave-to-orcaflex/SKILL.md) - Export to OrcaFlex
- [mooring-design](../mooring-design/SKILL.md) - Mooring system design
## References
- Faltinsen, O.M.: Sea Loads on Ships and Offshore Structures
- Newman, J.N.: Wave Effects on Deformable Bodies
- Molin, B.: On the Piston and Sloshing Modes in Moonpools
- OrcaWave Multi-Body Documentation
---
**Version History**
- **1.0.0** (2026-01-17): Initial release with STS analysis, gap resonance, and coupling matrix extraction
## Sub-Skills
- [Best Practices](best-practices/SKILL.md)
## Sub-Skills
- [Error Handling](error-handling/SKILL.md)
## Sub-Skills
- [Version Metadata](version-metadata/SKILL.md)
- [Common Scenarios (+1)](common-scenarios/SKILL.md)
- [Multi-Body Analysis Configuration (+1)](multi-body-analysis-configuration/SKILL.md)
- [CLI Usage](cli-usage/SKILL.md)
- [Export for Time-Domain](export-for-time-domain/SKILL.md)
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