# Viv Analysis Natural Frequencies JSON

> Sub-skill of viv-analysis: Natural Frequencies JSON (+1).

- Skill: `vamseeachanta/viv-analysis-natural-frequencies-json` (Agent Skill)
- Install (CLI): `npx skillmds@latest add vamseeachanta/viv-analysis-natural-frequencies-json`
- Raw SKILL.md: https://api.skillmd.com/api/skills/vamseeachanta/viv-analysis-natural-frequencies-json/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: vamseeachanta (https://skillmd.com/u/vamseeachanta)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/vamseeachanta/viv-analysis-natural-frequencies-json

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# Natural Frequencies JSON (+1)

## Natural Frequencies JSON


```json
{
  "member_name": "Riser1",
  "n_modes": 5,
  "frequencies": [0.15, 0.42, 0.78, 1.21, 1.72],
  "periods": [6.67, 2.38, 1.28, 0.83, 0.58],
  "boundary_conditions": "tension_controlled",
  "effective_tension": 500000.0
}
```

## VIV Screening Report


```json
{
  "member": "Brace1",
  "natural_frequency_hz": 2.5,
  "shedding_frequency_hz": 0.62,
  "reduced_velocity": 4.94,
  "is_susceptible": true,
  "lock_in_margin": 0.94,
  "safety_factor": 1.02,
  "recommendation": "VIV suppression required"
}
```