菜单
Assess vortex-induced vibration (VIV) for risers and tubular members with natural frequency and safety factor calculations. Use for VIV susceptibility analysis, natural frequency calculation, vortex shedding assessment, and tubular member fatigue from VIV.
默认使用会先检查来源的 Prompt；你也可以切换为直接命令，或下载本地副本。
决定是否安装前，请先阅读 SKILL.md，以及 SkillsMP 当前展示的配套文件。
用 Codex 或 Claude 帮你安装 复制这段 Prompt，粘贴到 Codex、Claude 或其他助手里，让它检查 Skill 页面并帮你完成安装。
直接命令不会经过审查 Prompt；运行前请先检查来源。
npx skills add https://github.com/vamseeachanta/workspace-hub --skill viv-analysis命令会保持在同一行。复制前请横向滚动并检查完整内容。
想先保存到本地？可下载 SkillsMP 当前能够提供的文件。
Write outbound email and external messages in Vamsee Achanta's voice — a subtle offer to help, never bold or rash claims. Load before drafting ANY email, LinkedIn/Collide reply, proposal note, or outreach sent under his name.
Save/publish analysis or computation results from ANY ecosystem repo to Hugging Face as a queryable, viewer-renderable dataset. Use when the user wants to "save results to hugging face", "publish dataset to HF", "hugging face data saving", "save analysis results", "hf dataset", "make results queryable", or "render via datasets-server API". Reshapes nested results into flat parquet tables, writes a dataset card with a viewer `configs:` block and provenance, applies license/public-vs-private routing, enforces a domain data-quality gate (faithful-to-source != correct), publishes to `aceengineer/<repo>-<projection>`, and verifies via the datasets-server API.
Clone, create, fork, configure, and manage GitHub repositories. Manage remotes, secrets, releases, and workflows. Works with gh CLI or falls back to git + GitHub REST API via curl.
基于 SOC 职业分类
正在显示 SKILL.md
| name | viv-analysis |
| description | Assess vortex-induced vibration (VIV) for risers and tubular members with natural frequency and safety factor calculations. Use for VIV susceptibility analysis, natural frequency calculation, vortex shedding assessment, and tubular member fatigue from VIV. |
| type | reference |
| updated | 2026-01-07 |
| capabilities | [] |
| requires | [] |
| tags | [] |
| scripts_exempt | true |
| category | engineering |
| version | 1.0.0 |
digitalmodel package installedfrom digitalmodel.subsea.viv_analysis.viv_analysis import VIVAnalysis
from digitalmodel.subsea.viv_analysis.viv_tubular_members import VIVTubularMembers
# Initialize analysis
viv = VIVAnalysis()
# Define member properties
member = {
"length": 50.0,
*See sub-skills for full details.*
### Vortex Shedding Analysis
```python
# Vortex shedding frequency
diameter = 0.5 # meters
current_velocity = 1.5 # m/s
strouhal = 0.2
shedding_freq = viv.vortex_shedding_frequency(
diameter=diameter,
velocity=current_velocity,
strouhal_number=strouhal
*See sub-skills for full details.*
### Tubular Member Analysis
```python
from digitalmodel.subsea.viv_analysis.viv_tubular_members import VIVTubularMembers
# Initialize tubular member analysis
tubular = VIVTubularMembers()
# Define member
member_props = {
"name": "Brace1",
"outer_diameter": 0.324,
*See sub-skills full details.*
```python
digitalmodel.subsea.viv_analysis.viv_fatigue VIVFatigue
viv_fatigue = VIVFatigue()
stress_range = viv_fatigue.calculate_stress_range(
amplitude=,
diameter=,
*See sub-skills full details.*
For subsea pipeline span work, treat VIV screening a coupled structural/fatigue workflow rather than a standalone vortex-shedding calculation:
Establish pipe section properties the actual design basis: OD, nominal WT, corrosion allowance, mill tolerance, grade/SMYS, weld factor, temperature factor, code/design factor.
Run a pressure-wall sanity check before relying on the section span/fatigue calculations. When using `digitalmodel`, prefer the pipe-capacity implementation under `src/digitalmodel/structural/pipe_capacity/` document the equation branch used.
Use minimum/corroded wall span stress fatigue section properties unless the governing code project basis specifies another convention.
Then evaluate span natural frequencies, reduced velocity, lock- susceptibility, stress , fatigue damage, acceptance criteria under DNV-RP-F105 / DNV-ST-F101 project-specific rules.
Do present pressure containment final wall adequacy; collapse, propagation buckling, local buckling, installation, hydrotest, thermal/strain, on-bottom stability, VIV/free-span fatigue may still govern.
See `references/pipeline-span-pressure-wall-precheck.md` the session-derived digitalmodel pressure-wall pattern / psi example.
| Class | Purpose |
|-------|---------|
| `VIVAnalysis` | Main VIV analysis router |
| `VIVTubularMembers` | Tubular member assessment |
| `VIVAnalysisComponents` | Component-level analysis |
| `VIVFatigue` | VIV-induced fatigue damage |
- [catenary-riser](../catenary-riser/SKILL.md) - Riser configuration
- [fatigue-analysis](../fatigue-analysis/SKILL.md) - VIV fatigue damage
- [structural-analysis](../structural-analysis/SKILL.md) - Stress verification
- DNV-RP-C205: Environmental Conditions Environmental Loads
- DNV-RP-F105: Free Spanning Pipelines
- Blevins, R.D.: Flow-Induced Vibration
- [Best Practices](best-practices/SKILL.md)
- [Version Metadata](version-metadata/SKILL.md)
- [[] - -01-07](--01-07/SKILL.md)
- [ Natural Frequency Analysis (+)](-natural-frequency-analysis/SKILL.md)
- [Strouhal Number (+)](strouhal-number/SKILL.md)
- [Complete VIV Screening Workflow](complete-viv-screening-workflow/SKILL.md)
- [Natural Frequencies JSON (+)](natural-frequencies-json/SKILL.md)
- [Design Code References](design-code-references/SKILL.md)