FESADev/docs/reference-models

Reference Model 문서 작성 가이드

이 디렉터리는 Reference Model Agent가 작성하거나 제안한 기능별 reference model 설계 문서를 보관하는 위치다.

Reference Model Agent는 FESA 기능 검증에 필요한 Abaqus .inp 기반 테스트 모델 포트폴리오와 references/<feature-id>/<model-id>/ artifact bundle 계약을 정의한다. Agent는 Abaqus, Nastran 또는 레퍼런스 솔버를 직접 실행하지 않고, reference CSV 값을 생성하지 않으며, solver 결과 비교나 release readiness 승인도 하지 않는다.

기본 파일명은 docs/reference-models/<feature-id>-reference-models.md 형식을 사용한다. 각 문서는 요구조건, 연구 브리프, 정식화, 수치 리뷰, I/O 정의를 입력으로 받아 구현 전에 준비해야 할 테스트 모델과 reference artifact 요구사항을 정의해야 한다.

Reference Model Agent 역할

수행한다:

• 기능별 reference model portfolio를 smoke, analytical, patch test, benchmark, regression, negative/invalid-input model로 구분한다.
• model.inp가 I/O Definition Agent의 supported Abaqus keyword subset 안에 있는지 확인한다.
• references/<feature-id>/<model-id>/ artifact bundle 구조와 필수 파일을 정의한다.
• metadata.json provenance, 단위, 좌표계, Abaqus version/source, output request, tolerance 정책을 정의한다.
• displacements.csv, reactions.csv, element_forces.csv, stresses.csv 요구사항을 정의한다.
• requirement와 model, compared quantity, tolerance, artifact status를 연결하는 Coverage Matrix를 작성한다.

수행하지 않는다:

• C++ 코드를 구현하지 않는다.
• parser를 구현하지 않는다.
• C++ API나 파일 구조를 설계하지 않는다.
• Abaqus, Nastran 또는 레퍼런스 솔버를 직접 실행하지 않는다.
• reference CSV를 생성하지 않는다.
• solver 결과를 비교하지 않는다.
• release readiness를 승인하지 않는다.
• reference 값, tolerance, Abaqus compatibility를 임의로 만들지 않는다.

문서 템플릿

# <feature title> Reference Models

## Metadata
- feature_id: <feature-id>
- source_requirement: docs/requirements/<feature-id>.md
- source_research: docs/research/<feature-id>-research.md
- source_formulation: docs/formulations/<feature-id>-formulation.md
- source_numerical_review: docs/numerical-reviews/<feature-id>-review.md
- source_io_definition: docs/io-definitions/<feature-id>-io.md
- status: draft | needs-user-decision | needs-reference-artifacts | ready-for-implementation-planning | blocked
- owner_agent: reference-model-agent
- date: <YYYY-MM-DD>

## Reference Strategy
- verification_scope: <feature verification purpose>
- code_verification: <unit/math-level checks supported by this portfolio>
- solution_verification: <mesh, convergence, patch, or analytical checks>
- benchmark_reference_comparison: <Abaqus/NAFEMS/NASA/paper-derived comparison plan>
- excluded_validation_scope: <physical experiment validation excluded unless explicitly available>

## Model Inventory

| model_id | category | purpose | status | required_artifacts |
| --- | --- | --- | --- | --- |
| <model-id> | smoke | <basic parser/solve path> | draft | model.inp, metadata.json, required CSVs |
| <model-id> | analytical | <closed-form comparison> | draft | model.inp, metadata.json, required CSVs |
| <model-id> | patch test | <element consistency check> | draft | model.inp, metadata.json, required CSVs |
| <model-id> | benchmark | <trusted benchmark comparison> | draft | model.inp, metadata.json, required CSVs |
| <model-id> | regression | <known defect guard> | draft | model.inp, metadata.json, required CSVs |
| <model-id> | negative/invalid-input | <unsupported keyword or invalid model diagnostic> | draft | model.inp, metadata.json |

## Model Record

### <model-id>
- category: smoke | analytical | patch test | benchmark | regression | negative/invalid-input
- purpose: <what this model proves>
- verified_requirements: [<requirement-id>]
- analysis_type: <linear static | nonlinear static | modal | other>
- element_type: <Abaqus element type and FESA feature element>
- material: <material model and values>
- boundary_conditions: <BC summary>
- loads: <load summary>
- expected_physical_quantities: displacement | reaction | element force | stress | strain | energy | residual
- tolerance: <absolute/relative/norm policy or needs-user-decision>
- source: <user | analytical | Abaqus Verification Guide | Abaqus Benchmarks Guide | NAFEMS | NASA/FEMCI | paper>
- artifact_status: draft | needs-reference-artifacts | ready-for-implementation-planning | blocked

## Abaqus Input Requirements
- input_file: references/<feature-id>/<model-id>/model.inp
- supported_keyword_subset: <keywords from docs/io-definitions/<feature-id>-io.md>
- model_data: <nodes, elements, sets, material, section, coordinates, units>
- history_data: <step, procedure, boundary conditions, loads, output requests>
- output_requests: <requests needed to populate reference CSV files>
- unsupported_keyword_policy: unsupported | ignored-with-warning | requires-user-decision

## Artifact Bundle Contract

```text
references/
  <feature-id>/
    <model-id>/
      model.inp
      metadata.json
      displacements.csv
      reactions.csv
      element_forces.csv
      stresses.csv
      README.md

Required files:

• model.inp: Abaqus input file for the reference model.
• metadata.json: provenance and model contract metadata.
• displacements.csv: nodal displacement reference results.
• reactions.csv: nodal reaction force reference results.
• element_forces.csv: element internal force reference results.
• stresses.csv: stress reference results.
• README.md: short description, generation notes, and limitations.

Optional files:

• strains.csv: strain reference results when required.
• energy_or_residual.csv: energy, residual, or convergence reference results when required.
• notes.md: manual review notes.

Metadata JSON Contract

{
  "feature_id": "<feature-id>",
  "model_id": "<model-id>",
  "artifact_status": "draft | needs-reference-artifacts | ready-for-implementation-planning | blocked",
  "abaqus_version": "<version or needs-user-decision>",
  "generation_owner": "<person/procedure>",
  "generation_date": "<YYYY-MM-DD>",
  "source_documents": ["docs/requirements/<feature-id>.md"],
  "units": "<unit system>",
  "coordinate_system": "global Cartesian unless otherwise documented",
  "analysis_type": "<analysis type>",
  "element_types": ["<Abaqus element type>"],
  "material_values": {},
  "boundary_condition_summary": "<summary>",
  "load_summary": "<summary>",
  "output_requests": ["U", "RF", "S", "<feature-specific quantities>"],
  "csv_schema_version": "<version>",
  "tolerance_policy": "<absolute/relative/norm policy>",
  "limitations": ["<known limitation>"]
}

Reference CSV Requirements

displacements.csv

• Required when nodal displacement is a verification quantity.
• Must include step/frame identity, node id, displacement components, coordinate system, and units.

reactions.csv

• Required when constrained DOF reactions or global equilibrium are verification quantities.
• Must include step/frame identity, node id, reaction components, coordinate system, and units.

element_forces.csv

• Required when element internal force is a verification quantity.
• Must include step/frame identity, element id, output location, component, value, and units.

stresses.csv

• Required when stress is a verification quantity.
• Must include step/frame identity, element id, integration point or recovery location, component, value, coordinate system, and units.

Optional CSVs

• strains.csv: required when strain is part of the acceptance criteria.
• energy_or_residual.csv: required when energy balance, residual, or convergence data is part of the acceptance criteria.

Coverage Matrix

requirement_id	model_id	compared_quantity	artifact_file	tolerance	verification_method	status
		displacement	displacements.csv		reference-comparison	draft
		reaction	reactions.csv		reference-comparison	draft
		element force	element_forces.csv		reference-comparison	draft
		stress	stresses.csv		reference-comparison	draft

Artifact Acceptance Checklist

• 모든 must requirement가 최소 하나의 model_id와 compared_quantity에 연결되어 있다.
• model.inp가 기능별 supported Abaqus keyword subset을 벗어나지 않는다.
• metadata.json에 provenance, Abaqus version/source, units, coordinate system, tolerance, CSV schema version이 기록되어 있다.
• 필수 CSV 파일이 존재하거나, 기능상 불필요한 파일은 명확한 reason과 함께 제외되어 있다.
• output request가 필요한 CSV 물리량을 생성할 수 있도록 정의되어 있다.
• reference CSV가 없으면 status는 needs-reference-artifacts다.
• tolerance, source, units, coordinate system이 불명확하면 status는 needs-user-decision이다.

Open Issues and Downstream Handoff

I/O Definition Agent

• <supported keyword, output request, CSV schema clarification>

Implementation Planning Agent

• <tests that should fail before implementation, model order, acceptance criteria>

Reference Verification Agent

• <CSV schema, ID matching, units, coordinate conventions, output locations, tolerance mapping>

Physics Evaluation Agent

• <equilibrium, symmetry, displacement direction, stress location, rigid body mode, load path sanity checks>

## 품질 기준

- Reference model의 목적과 검증 대상 requirement가 명확해야 한다.
- `model.inp`는 Abaqus input file이며, 기능별 supported keyword subset을 따라야 한다.
- model data와 history data를 구분해야 한다.
- output request와 required CSV 사이의 연결이 명확해야 한다.
- `references/<feature-id>/<model-id>/` 구조와 필수 artifact가 명시되어야 한다.
- `metadata.json`에는 provenance, Abaqus version/source, units, coordinate system, tolerance, CSV schema version이 포함되어야 한다.
- reference CSV가 없으면 완료 상태가 아니라 `needs-reference-artifacts` 상태로 둔다.
- 모든 `must` requirement는 Coverage Matrix에서 model, compared quantity, tolerance, verification method로 추적되어야 한다.