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Analyze catenary and lazy wave riser configurations for static shape, forces, and OrcaFlex model generation. Use for riser static configuration analysis, catenary force calculations, lazy wave design, and generating OrcaFlex models from catenary parameters.
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| name | catenary-riser |
| description | Analyze catenary and lazy wave riser configurations for static shape, forces, and OrcaFlex model generation. Use for riser static configuration analysis, catenary force calculations, lazy wave design, and generating OrcaFlex models from catenary parameters. |
| type | reference |
| updated | 2026-01-07 |
| capabilities | [] |
| requires | [] |
| tags | [] |
| scripts_exempt | true |
| category | engineering |
| version | 1.0.0 |
digitalmodel package installedfrom digitalmodel.subsea.catenary.catenary_equation import CatenaryEquation
import numpy as np
catenary = CatenaryEquation()
top_end = (0.0, 100.0)
touchdown = (500.0, 0.0)
horizontal_tension = catenary.solve(
top_end=top_end,
*See sub-skills for full details.*
### Catenary Riser Analysis
```python
from digitalmodel.subsea.catenary.catenary_riser import CatenaryRiser
from digitalmodel.subsea.catenary.pipe_properties import PipeProperties
pipe = PipeProperties(
outer_diameter=0.2032,
wall_thickness=0.0127,
steel_density=7850,
internal_fluid_density=800
)
*See sub-skills for full details.*
### Lazy Wave Catenary
```python
from digitalmodel.subsea.catenary.lazy_wave_catenary import LazyWaveCatenary
lazy_wave = LazyWaveCatenary()
config = {
"water_depth": 1500.0,
"hang_off_angle": 8.0,
"buoyancy_section": {
"start_length": 800.0,
: ,
*See sub-skills full details.*
```python
digitalmodel.subsea.catenary.orcaflex_model OrcaFlexModelBuilder
builder = OrcaFlexModelBuilder()
builder.set_line_from_catenary(
catenary_results=results,
line_name=,
segment_length=
)
builder.add_buoyancy_section(
*See sub-skills full details.*
| Class | Purpose |
|-------|---------|
| `CatenaryEquation` | Mathematical catenary solver |
| `CatenaryRiser` | Main analysis orchestrator |
| `LazyWaveCatenary` | Dynamic catenary buoyancy |
| `PipeProperties` | Material geometric properties |
| `OrcaFlexModelBuilder` | Model export to OrcaFlex |
- [orcaflex/modeling](../orcaflex/modeling/SKILL.md) - Run OrcaFlex simulations
- [fatigue-analysis](../fatigue-analysis/SKILL.md) - Fatigue at critical locations
- [structural-analysis](../structural-analysis/SKILL.md) - Stress verification
- API RP 2RD: Design of Risers Floating Production Systems
- DNV-OS-F201: Dynamic Risers
- [Best Practices](best-practices/SKILL.md)
- [Version Metadata](version-metadata/SKILL.md)
- [[] - -01-07](--01-07/SKILL.md)
- [ Simple Catenary Analysis (+)](-simple-catenary-analysis/SKILL.md)
- [Catenary Shape CSV](catenary-shape-csv/SKILL.md)