orcaflex-modal-analysis-dof-percentage-calculation

Sub-skill of orcaflex-modal-analysis: DOF Percentage Calculation (+2).

5 stars

Best use case

orcaflex-modal-analysis-dof-percentage-calculation is best used when you need a repeatable AI agent workflow instead of a one-off prompt.

Sub-skill of orcaflex-modal-analysis: DOF Percentage Calculation (+2).

Teams using orcaflex-modal-analysis-dof-percentage-calculation should expect a more consistent output, faster repeated execution, less prompt rewriting.

When to use this skill

  • You want a reusable workflow that can be run more than once with consistent structure.

When not to use this skill

  • You only need a quick one-off answer and do not need a reusable workflow.
  • You cannot install or maintain the underlying files, dependencies, or repository context.

Installation

Claude Code / Cursor / Codex

$curl -o ~/.claude/skills/dof-percentage-calculation/SKILL.md --create-dirs "https://raw.githubusercontent.com/vamseeachanta/workspace-hub/main/.agents/skills/_archive/engineering/marine-offshore/orcaflex-modal-analysis/dof-percentage-calculation/SKILL.md"

Manual Installation

  1. Download SKILL.md from GitHub
  2. Place it in .claude/skills/dof-percentage-calculation/SKILL.md inside your project
  3. Restart your AI agent — it will auto-discover the skill

How orcaflex-modal-analysis-dof-percentage-calculation Compares

Feature / Agentorcaflex-modal-analysis-dof-percentage-calculationStandard Approach
Platform SupportNot specifiedLimited / Varies
Context Awareness High Baseline
Installation ComplexityUnknownN/A

Frequently Asked Questions

What does this skill do?

Sub-skill of orcaflex-modal-analysis: DOF Percentage Calculation (+2).

Where can I find the source code?

You can find the source code on GitHub using the link provided at the top of the page.

SKILL.md Source

# DOF Percentage Calculation (+2)

## DOF Percentage Calculation


For each mode, the DOF percentage indicates how much of the mode's energy is in each degree of freedom:

```
DOF_percentage = (|max_DOF_value|² / Σ|all_DOF_values|²) × 100
```

## Mode Selection Criteria


A mode is "selected" for a DOF when:
- `DOF_percentage > threshold_percentage`

This filtering helps identify:
- **Heave-dominated modes** (Z threshold)
- **Surge/sway modes** (X/Y threshold)
- **Roll/pitch/yaw modes** (Rotation thresholds)

## Relationship to VIV


Modal frequencies are critical for VIV assessment:

```python
# VIV lock-in check
from digitalmodel.subsea.viv_analysis.viv_analysis import VIVAnalysis

viv = VIVAnalysis()

# Get natural frequency from modal analysis
natural_freq = 1 / mode_period  # Hz

*See sub-skills for full details.*

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