Modal
K-Dense-AI/scientific-agent-skills
Modal is a serverless cloud platform for running Python on demand, including on-demand GPUs.
Complete workflow for modal/frequency analysis - extract natural frequencies and mode shapes.
MITAuto-check passed
Install Abaqus Modal Analysis
$ npx skills add Cai-aa/CAE-Agent-Hub --skill abaqus-modal-analysis -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Cai-aa/CAE-Agent-Hub abaqus-modal-analysis --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/Cai-aa/CAE-Agent-Hub.git skills-src && mkdir -p .claude/skills && cp -r skills-src/Skill/abaqus/analysis/abaqus-modal-analysis .claude/skills/abaqus-modal-analysis && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "abaqus-modal-analysis" agent skill from https://github.com/Cai-aa/CAE-Agent-Hub/tree/main/Skill/abaqus/analysis/abaqus-modal-analysis into .claude/skills/abaqus-modal-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "abaqus-modal-analysis", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/Cai-aa/CAE-Agent-Hub/tree/main/Skill/abaqus/analysis/abaqus-modal-analysisType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add Cai-aa/CAE-Agent-Hub --skill abaqus-modal-analysis -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Cai-aa/CAE-Agent-Hub abaqus-modal-analysis --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Cai-aa/CAE-Agent-Hub.git skills-src && mkdir -p .agents/skills && cp -r skills-src/Skill/abaqus/analysis/abaqus-modal-analysis .agents/skills/abaqus-modal-analysis && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "abaqus-modal-analysis" agent skill from https://github.com/Cai-aa/CAE-Agent-Hub/tree/main/Skill/abaqus/analysis/abaqus-modal-analysis into .agents/skills/abaqus-modal-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "abaqus-modal-analysis", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add Cai-aa/CAE-Agent-Hub --skill abaqus-modal-analysis -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Cai-aa/CAE-Agent-Hub abaqus-modal-analysis --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Cai-aa/CAE-Agent-Hub.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/Skill/abaqus/analysis/abaqus-modal-analysis .cursor/skills/abaqus-modal-analysis && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "abaqus-modal-analysis" agent skill from https://github.com/Cai-aa/CAE-Agent-Hub/tree/main/Skill/abaqus/analysis/abaqus-modal-analysis into .cursor/skills/abaqus-modal-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "abaqus-modal-analysis", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/Cai-aa/CAE-Agent-Hub.git --path Skill/abaqus/analysis/abaqus-modal-analysis--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add Cai-aa/CAE-Agent-Hub --skill abaqus-modal-analysis -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Cai-aa/CAE-Agent-Hub abaqus-modal-analysis --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Cai-aa/CAE-Agent-Hub.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/Skill/abaqus/analysis/abaqus-modal-analysis .gemini/skills/abaqus-modal-analysis && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "abaqus-modal-analysis" agent skill from https://github.com/Cai-aa/CAE-Agent-Hub/tree/main/Skill/abaqus/analysis/abaqus-modal-analysis into .gemini/skills/abaqus-modal-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "abaqus-modal-analysis", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install Cai-aa/CAE-Agent-Hub abaqus-modal-analysisInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add Cai-aa/CAE-Agent-Hub --skill abaqus-modal-analysis -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Cai-aa/CAE-Agent-Hub.git skills-src && mkdir -p .github/skills && cp -r skills-src/Skill/abaqus/analysis/abaqus-modal-analysis .github/skills/abaqus-modal-analysis && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "abaqus-modal-analysis" agent skill from https://github.com/Cai-aa/CAE-Agent-Hub/tree/main/Skill/abaqus/analysis/abaqus-modal-analysis into .github/skills/abaqus-modal-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "abaqus-modal-analysis", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add Cai-aa/CAE-Agent-Hub --skill abaqus-modal-analysis -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Cai-aa/CAE-Agent-Hub abaqus-modal-analysis --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Cai-aa/CAE-Agent-Hub.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/Skill/abaqus/analysis/abaqus-modal-analysis .opencode/skills/abaqus-modal-analysis && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "abaqus-modal-analysis" agent skill from https://github.com/Cai-aa/CAE-Agent-Hub/tree/main/Skill/abaqus/analysis/abaqus-modal-analysis into .opencode/skills/abaqus-modal-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "abaqus-modal-analysis", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
abaqus-modal-analysis- GitHub stars
- 1k
- Token cost
- ~1.2k tokens
- SKILL.md length
- 543 words
- Files
- 4
- Skills in repo
- 57
- Repo updated
- First seen
- Licence
- MIT
At a glance
Complete workflow for modal/frequency analysis - extract natural frequencies and mode shapes.
- Works in 7 steps: Understand User's Goal → Create Geometry → Define Material WITH DENSITY → …
- Vibration analysis and resonance avoidance
- SKILL.md covers When to Use This Skill, Prerequisites, Workflow: Modal Analysis and Key Parameters, plus 5 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Abaqus Modal Analysis is an agent skill from Cai-aa/CAE-Agent-Hub. Complete workflow for modal/frequency analysis - extract natural frequencies and mode shapes. Use for vibration analysis and resonance avoidance.
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files (for example `UPSTREAM.md` and `metadata.json`).
The licence is MIT.
When your agent uses it
- Vibration analysis and resonance avoidance
Example prompts
- “/abaqus-modal-analysis”
Requirements
- Pre-approved tools (allowed-tools): Read, Write, Edit, Glob, Grep, Bash(abaqus:*), Skill
Workflow steps
7 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 194ef49. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
ReadWriteEditGlobGrepBash(abaqus:*)Skill
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Abaqus Modal Analysis loads about 1.2k tokens when it runs. Until then it costs about 42 tokens; SKILL.md has 543 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from Cai-aa/CAE-Agent-Hub at commit 194ef49, republished under its MIT licence (© Cai-aa). 543 words, ~1,236 tokens.
Download SKILL.mdSave it as
.claude/skills/abaqus-modal-analysis/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.- name
- abaqus-modal-analysis
- description
- Complete workflow for modal/frequency analysis - extract natural frequencies and mode shapes. Use for vibration analysis and resonance avoidance.
- allowed-tools
- Read, Write, Edit, Glob, Grep, Bash(abaqus:*), Skill
Abaqus Modal Analysis Skill
Extract natural frequencies and mode shapes from a structure. Use for vibration analysis, resonance avoidance, and dynamic characterization.
When to Use This Skill
Route here when user mentions:
- "Natural frequency", "modal analysis", "vibration"
- "Resonance", "mode shapes", "eigenvalue"
- "How will it vibrate?", "avoid resonance at X Hz"
- "First mode frequency", "natural frequency of beam/plate"
Route elsewhere:
- Forced vibration response → use transient dynamic
- Frequency response function → use steady-state dynamics
- Static stress/deflection →
/abaqus-static-analysis - Impact/crash →
/abaqus-dynamic-analysis
Prerequisites
Before modal analysis:
- Geometry and mesh ready
- Material MUST have density defined (required for mass matrix)
- Boundary conditions define the modal boundary
- NO loads needed for eigenvalue extraction
Workflow: Modal Analysis
Step 1: Understand User's Goal
Ask if unclear:
- How many modes? First few (5-10) or all in frequency range?
- Boundary conditions? Fixed, pinned, free-free?
- Frequency range of interest? Motor at 60 Hz, etc.?
- What geometry? Beam, plate, bracket, assembly?
Step 2: Create Geometry
Route to /abaqus-geometry for part creation.
Step 3: Define Material WITH DENSITY
Route to /abaqus-material - density is essential.
Without density, Abaqus cannot compute the mass matrix and modal analysis will fail.
| Material | Density (tonne/mm^3) |
|---|---|
| Steel | 7.85e-9 |
| Aluminum | 2.7e-9 |
| Titanium | 4.5e-9 |
Step 4: Create Mesh
Route to /abaqus-mesh for meshing.
Mesh quality affects mode shapes - finer mesh gives more accurate high-frequency modes.
Step 5: Apply Boundary Conditions
Route to /abaqus-bc to define support type.
| Configuration | Expected Modes | Use Case |
|---|---|---|
| Free-free (no BCs) | 6 rigid body modes at ~0 Hz, then elastic | Test correlation |
| Cantilever (one end fixed) | First mode is bending | Mounted component |
| Simply supported | Bending, plate modes | Bridge-like structures |
| Fixed-fixed | Higher frequencies than cantilever | Both ends constrained |
Note: Free-free analysis gives 6 modes at ~0 Hz (rigid body translation/rotation). Real elastic modes start at mode 7.
Step 6: Create Frequency Step
Route to /abaqus-step for FrequencyStep configuration.
Key decisions:
- Fixed count: Extract exactly N modes (numEigen=10)
- Frequency range: All modes between min and max Hz
- Shift-invert: Modes near target frequency (for high-frequency focus)
Show full SKILL.md (215 more words)Show less
Step 7: Run and Extract
Route to /abaqus-job to submit, then /abaqus-odb to read frequencies from result frames.
Key Parameters
| Parameter | Recommended | Notes |
|---|---|---|
| Eigensolver | LANCZOS | Best for most problems |
| numEigen | 10 | Start with first 10 modes |
| Normalization | DISPLACEMENT | Mode shapes max = 1 |
| Mesh size | Adequate for highest mode | Finer mesh for high frequencies |
Validation Checklist
After analysis, verify:
- Density defined in material
- BCs match intended support condition
- No loads applied (eigenvalue extraction ignores loads)
- Mesh adequate for highest mode of interest
- Frequencies reasonable for geometry/material
- Free-free: confirm 6 modes near 0 Hz
Analytical Comparison (Simple Geometries)
For cantilever beams, first mode can be verified analytically:
- f1 ~ (1.875^2 / 2piL^2) * sqrt(EI / rhoA)
Compare FEA result to analytical for validation.
Troubleshooting
| Problem | Likely Cause | Solution |
|---|---|---|
| "Material has no density" | Density not defined | Add density to material |
| Negative eigenvalue | Unconstrained/unstable | Check BCs or add soft springs |
| 6 zero-frequency modes | Free-free (expected) | Real modes start at mode 7 |
| Frequencies too high/low | Unit error | Verify mm-tonne-s-N-MPa units |
| Memory error | Too many modes/elements | Reduce numEigen or coarsen mesh |
Related Skills
/abaqus-material- Must include density/abaqus-bc- Define modal boundary conditions/abaqus-step- FrequencyStep configuration/abaqus-odb- Extract frequencies and mode shapes/abaqus-geometry- Create geometry/abaqus-mesh- Mesh affects mode accuracy
Code Patterns
For API syntax and code examples, see:
© Cai-aa, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 3 other files in Skill/abaqus/analysis/abaqus-modal-analysis of Cai-aa/CAE-Agent-Hub.
- SKILL.md
- UPSTREAM.md
- UPSTREAM_LICENSE
- metadata.json
Open the folder on GitHubat commit 194ef49
Compare with similar skills
Abaqus Modal Analysis next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Abaqus Modal Analysis this skillCai-aa/CAE-Agent-Hub | 1k | — | ~1.2k | Automated safety check: Pass | MIT | |
| ModalK-Dense-AI/scientific-agent-skills | 48k | 1 repos | ~4.5k | Automated safety check: Notes | Apache-2.0 | |
| Imperative Modal APIlobehub/lobehub | 83k | — | ~1.3k | Automated safety check: Pass | Custom licence | |
| Modaldavila7/claude-code-templates | 32k | 7 repos | ~2.6k | Automated safety check: Pass | MIT | |
| Extractalirezarezvani/claude-skills | 28k | — | ~1.4k | Automated safety check: Pass | MIT | |
| Natural Writingflutter/flutter | 179k | — | ~1.9k | Automated safety check: Pass | BSD-3-Clause |
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Questions about Abaqus Modal Analysis
What does Abaqus Modal Analysis do?
Complete workflow for modal/frequency analysis - extract natural frequencies and mode shapes. Abaqus Modal Analysis is an agent skill from Cai-aa/CAE-Agent-Hub. Complete workflow for modal/frequency analysis - extract natural frequencies and mode shapes.
When should I use Abaqus Modal Analysis?
Abaqus Modal Analysis fits situations like: vibration analysis and resonance avoidance.
How do I install Abaqus Modal Analysis in Claude Code?
Run `npx skills add Cai-aa/CAE-Agent-Hub --skill abaqus-modal-analysis -a claude-code`. Or copy the skill folder (Skill/abaqus/analysis/abaqus-modal-analysis in Cai-aa/CAE-Agent-Hub) into .claude/skills/abaqus-modal-analysis in your project. Claude Code loads it when a task matches its description.
How do I install Abaqus Modal Analysis in Codex?
Run `npx skills add Cai-aa/CAE-Agent-Hub --skill abaqus-modal-analysis -a codex`. Or copy the skill folder (Skill/abaqus/analysis/abaqus-modal-analysis in Cai-aa/CAE-Agent-Hub) into .agents/skills/abaqus-modal-analysis in your project. Codex loads it when a task matches its description.
Can I use Abaqus Modal Analysis in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Cai-aa/CAE-Agent-Hub --skill abaqus-modal-analysis -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/abaqus-modal-analysis, .gemini/skills/abaqus-modal-analysis, .github/skills/abaqus-modal-analysis and .opencode/skills/abaqus-modal-analysis in your project.
What does Abaqus Modal Analysis need to run?
SKILL.md names no scripts, command-line tools or credentials: Abaqus Modal Analysis is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Write, Edit, Glob, Grep, Bash(abaqus:*), Skill.
Does Abaqus Modal Analysis access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Abaqus Modal Analysis safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Abaqus Modal Analysis use?
Abaqus Modal Analysis is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Abaqus Modal Analysis use?
About 1.2k tokens (SKILL.md is roughly 4.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Abaqus Modal Analysis?
Skills that share tags, products or a category with Abaqus Modal Analysis: Modal (K-Dense-AI/scientific-agent-skills, 48k stars), Imperative Modal API (lobehub/lobehub, 83k stars), Modal (davila7/claude-code-templates, 32k stars) and Extract (alirezarezvani/claude-skills, 28k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Abaqus Modal Analysis?
Cai-aa (a GitHub user) maintains it in Cai-aa/CAE-Agent-Hub, which has 1,003 GitHub stars. The repository holds 57 skills in this directory. The repository was last updated on September 30, 2026.
Source: Cai-aa/CAE-Agent-Hub on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.