FESADev/docs/shell-surface-pressure-load/release.md

Shell Surface Pressure Load 릴리스 준비 보고서

1. Metadata

• feature_id: shell-surface-pressure-load
• status: ready-for-release
• owner_agent: release-agent
• date: 2026-09-01
• audited_head: e5e8ccc8ff84a97e64ab2bc1889b5ab7aaae1c77
• physics_evaluated_commit: 1eb4dce885175b78b8229b095f14cac102ea93df
• workflow_basis: Gates 1–7 Coordinator-audited passed
• authoritative_output: input lexical sibling <stem>_results.h5
• tolerance_authority: docs/TOLERANCE.md
• source_docs: requirements.md, research.md, formulation.md, numerical-review.md, reference-model.md, io.md, implementation-plan.md
• source_reports: implementation-report.md, build-test.md, reference-comparison.md, corrections.md, physics-evaluation.md

본 판정은 FESA 기능 전달 workflow의 내부 release readiness에 한정한다. Publish, deploy, package, tag, merge, commit, push 또는 외부 배포 권한을 부여하지 않는다.

2. Release Scope

구분	포함 범위
기능	Assembly-level *SURFACE, TYPE=ELEMENT, NAME=<name>의 `SPOS
analysis type	단일 linear static의 reference-configuration pressure, 단일 NLGEOM=YES full-Newton nonlinear static의 current-configuration follower pressure와 external tangent
elements	Source type과 label을 보존하는 four-node S4, S4R; 기존 FESA MITC4 선택
materials/sections	기존 linear isotropic elastic MITC4 shell material/section; 이 기능은 material 범위를 확장하지 않음
load semantics	Positive P는 selected surface normal 반대 방향, negative P는 방향 반전, load factor는 정확히 한 번 적용
assembly/physics	Stable full-DOF external load/tangent assembly, free/constrained projection, reaction/free residual, current-arm global force/moment equilibrium, deterministic ordering
input subset	Direct <instance>.<element-label> member와 explicit INSTANCE=에 결속된 flat assembly ELSET member; case-insensitive lookup과 stable raw/source identity
result scope	기존 schema 0/1 HDF5의 displacement, generalized force/residual, reaction, global equilibrium 및 기존 MITC4 result chain; 새 pressure-only dataset 없음
reference scope	Exact stored nonlinear S4/SPOS/positive-P case의 factor-one nodal U1/U2/U3 blocking, UR1/UR2/UR3 warning-only comparison
artifact scope	Runtime authoritative artifact는 <stem>_results.h5; CSV는 external reference/debug evidence이며 FESA product output이 아님

Release 범위에서 제외되는 핵심 항목은 *DLOAD, nonuniform/field/user pressure, node/edge/double-sided/contact surface, S4/S4R 이외 element, material nonlinearity, dynamics, thermal/contact/buckling, multiple-step propagation, surface offset/thickness-side correction, pressure-only result quantity 및 다른 solver 내부 알고리즘과의 동등성 주장이다.

3. Gate Evidence Inventory

Gate evidence	feature/status 감사 결과	release disposition
requirements.md	동일 feature, must 001–024; 초기 draft-for-coordinator-gate-review label을 유지하지만 Coordinator Gate 1 통과 및 이후 전 단계의 binding baseline으로 사용됨	pass
research.md	동일 feature; 초기 gate-review label을 유지하며 formulation/reference 범위와 non-equivalence 경계가 후속 문서에 반영됨	pass
formulation.md	ready-for-numerical-review; force/tangent/sign/configuration/assembly 계약이 numerical-review.md에서 독립 승인됨	pass
numerical-review.md	pass-for-io-definition; tau_J=1.0e-12, analytical/objectivity/tangent/equilibrium gate 확정	pass
reference-model.md	pass-for-io-definition; exact required input/CSV, row identity, U/UR disposition과 immutable artifact contract 확정	pass
io.md	ready-for-implementation-planning; input subset, semantic identity, diagnostics, schema 0/1, HDF5-to-CSV projection 확정	pass
implementation-plan.md	archival pre-execution label은 draft-awaiting-user-approval; 승인 후 materialized Steps 1–7 실행 및 Gate 6 보고서로 plan 이행이 입증됨	pass
implementation-report.md	pass-for-physics-evaluation 권고; TDD Steps 1–6와 final evidence audit 완료	pass
build-test.md	focused 64/64, pressure reference 9/9, automatic Stop full MSVC/CTest 362/362, 0 failed, 새 /W4 /WX warning 없음	pass
reference-comparison.md	explicit pass-for-physics-evaluation; precheck 통과, U blocking 2187/2187, UR warning-only 2187/2187, 두 family row/RMS 모두 pass	pass
corrections.md	중복 full-verification Harness timeout을 implementation defect와 분리하고 단일 Stop owner로 교정; 이후 full 362/362로 해소됨	resolved/pass
physics-evaluation.md	pass-for-release-agent; force/moment normalized balance 6.758e-14/3.725e-14 <= 1e-8, blocker 없음	pass

Staleness 감사에서 Physics Agent가 평가한 1eb4dce는 현재 HEAD의 ancestor이며, 그 이후 변경은 coordination.md와 physics-evaluation.md뿐이다. 평가 후 source, test, CMake, reference artifact 또는 tolerance 변경은 없다. 초기 문서의 archival status label과 implementation-report.md의 compact requirement/evidence shorthand는 Coordinator 승인, implementation-plan.md §11, 실제 named-suite inventory, reference 및 physics evidence로 교차 확인했다. Release acceptance를 바꾸는 미해결 상태·범위·수치 모순은 없다.

Release Checklist

• 필수 Gate 1–7 문서가 모두 존재하고 feature_id가 일치한다.
• Full MSVC x64 Debug build/CTest evidence가 362/362 PASS, 0 failed다.
• reference-comparison.md가 pass-for-physics-evaluation이고 required comparison file이 모두 존재한다.
• physics-evaluation.md가 pass-for-release-agent다.
• Must requirement 24/24가 acceptance, test/internal model, required external reference 및 release disposition에 연결된다.
• Exact input/CSV hash와 path가 구현 전후 동일하다.
• Blocking U family, warning-only UR family 및 internal equilibrium evidence가 모두 pass했다.
• Unsupported/deferred 범위와 accepted limitations를 사용자-facing하게 기록했다.
• Unresolved implementation defect, missing declared comparison file, tolerance 변경 또는 upstream decision이 없다.
• 이 판정이 외부 release 권한이 아님을 명시했다.

4. Acceptance Traceability

test id는 implementation-plan.md의 TDD ID와 실제 passing named suite를 함께 나타낸다. BM-*는 research.md의 bounded verification model이며, external case가 필요한 항목에는 shellnl-meshfine-pressure-s4-follower를 명시한다.

requirement id	compact acceptance criterion	test id / passing evidence	reference model id	verification report	release disposition
FESA-REQ-SHELL-PRESSURE-001	Approved SURFACE+DSLOAD S4/S4R mapping과 identity 보존	T-INPUT-VALID; InpSyntax, ShellSurfacePressureInput	BM-07 + internal valid fixtures	build-test.md	included/pass
FESA-REQ-SHELL-PRESSURE-002	Positive/zero/negative finite scalar exact-once, nonfinite reject	T-INPUT-VALID, T-INPUT-NEG; ShellSurfacePressureDomain	BM-01, BM-08	build-test.md	included/pass
FESA-REQ-SHELL-PRESSURE-003	Unique deterministic instance/element/side inventory와 order	T-INPUT-VALID, T-ASSEMBLY; SurfacePressureAssembly	BM-03	build-test.md	included/pass
FESA-REQ-SHELL-PRESSURE-004	Only S4/S4R and SPOS/SNEG; source type/label 보존	T-INPUT-VALID, T-INPUT-NEG; target rejection cases	BM-01, BM-08	build-test.md	constraint/pass
FESA-REQ-SHELL-PRESSURE-005	Positive pressure는 selected normal 반대, negative는 정확히 반전	T-KERNEL-FORCE; ReversesExactlyForSposSnegAndNegativeMagnitude	BM-01	build-test.md, physics-evaluation.md	physics/pass
FESA-REQ-SHELL-PRESSURE-006	Connectivity-derived SPOS normal과 SNEG inverse	T-KERNEL-FORCE; sign/connectivity kernel cases	BM-01, BM-02	build-test.md, physics-evaluation.md	physics/pass
FESA-REQ-SHELL-PRESSURE-007	Linear pressure는 reference area/normal에서 displacement-independent	T-KERNEL-FORCE, T-LINEAR; LinearShellSurfacePressure	BM-01, BM-02	build-test.md	included/pass
FESA-REQ-SHELL-PRESSURE-008	NLGEOM pressure는 current X+u follower load	T-KERNEL-FORCE, T-NONLINEAR; current-area/objectivity cases	BM-04, BM-07	build-test.md, physics-evaluation.md	physics/pass
FESA-REQ-SHELL-PRESSURE-009	External follower-force derivative가 Newton tangent에 포함	T-KERNEL-TANGENT, T-NONLINEAR; centered FD/sign cases	BM-05, BM-06	build-test.md, physics-evaluation.md	numerical/pass
FESA-REQ-SHELL-PRESSURE-010	Step load factor 0/0.5/1을 정확히 한 번 적용	T-ASSEMBLY, T-LINEAR, T-NONLINEAR; factor cases	BM-03, BM-06	build-test.md	numerical/pass
FESA-REQ-SHELL-PRESSURE-011	Stable full-DOF external load/tangent 후 projection	T-ASSEMBLY, T-LINEAR; full-space/order cases	BM-03	build-test.md	included/pass
FESA-REQ-SHELL-PRESSURE-012	Pressure가 constrained reaction과 free residual에 포함	T-LINEAR, T-NONLINEAR; reaction/residual/balance cases	BM-01, BM-06, BM-07	reference-comparison.md, physics-evaluation.md	physics/pass
FESA-REQ-SHELL-PRESSURE-013	Resolution/reduction/result/diagnostic/comparison order 결정적	T-INPUT-VALID, T-ASSEMBLY, T-NONLINEAR, T-REF-COMPARE	BM-03, BM-07	build-test.md, reference-comparison.md	constraint/pass
FESA-REQ-SHELL-PRESSURE-014	Unsupported SURFACE/DSLOAD variant fail-closed	T-INPUT-NEG; ShellSurfacePressureInput negative matrix	BM-08	build-test.md	constraint/pass
FESA-REQ-SHELL-PRESSURE-015	Missing/empty/ambiguous/conflicting/scope target fail-closed	T-INPUT-NEG; mapping failure/no-partial-candidate cases	BM-08	build-test.md	constraint/pass
FESA-REQ-SHELL-PRESSURE-016	Unsupported procedure, nonfinite, invalid geometry fail-closed	T-INPUT-NEG, T-KERNEL-TANGENT, T-NONLINEAR; rollback cases	BM-04, BM-05, BM-08	build-test.md	constraint/pass
FESA-REQ-SHELL-PRESSURE-017	Stable diagnostics와 failed candidate/output atomicity	T-INPUT-NEG, T-CLI-HDF5, T-NONLINEAR; final preservation cases	BM-08	build-test.md	output/pass
FESA-REQ-SHELL-PRESSURE-018	기존 schema 0/1 HDF5만 authoritative; 새 pressure dataset 없음	T-CLI-HDF5; schema/no-new-path writer regressions	BM-07	implementation-report.md, build-test.md	output/pass
FESA-REQ-SHELL-PRESSURE-019	Existing displacement/reaction/residual/equilibrium/result chain finite	T-LINEAR, T-NONLINEAR, T-REF-COMPARE	BM-06, BM-07	reference-comparison.md, physics-evaluation.md	output/pass
FESA-REQ-SHELL-PRESSURE-020	Linear S4/S4R sign/resultant/reaction/mesh-order suite 통과	T-KERNEL-FORCE, T-LINEAR; analytical suites	BM-01–BM-03	build-test.md, physics-evaluation.md	verification/pass
FESA-REQ-SHELL-PRESSURE-021	Objectivity/current-area/tangent/residual/global balance 통과	T-KERNEL-TANGENT, T-NONLINEAR; force/moment <=1e-8	BM-04–BM-06, BM-07	reference-comparison.md, physics-evaluation.md	verification/pass
FESA-REQ-SHELL-PRESSURE-022	Exact required input/CSV를 current path에서 read-only 사용	T-REF-PRECHECK, E-FINAL; hash/size pre/post match	shellnl-meshfine-pressure-s4-follower	reference-comparison.md	verification/pass
FESA-REQ-SHELL-PRESSURE-023	Factor-one source-key mapping, U blocking/UR warning, precheck first	T-REF-PRECHECK, T-REF-COMPARE, E-FINAL; 2187+2187	shellnl-meshfine-pressure-s4-follower	reference-comparison.md	verification/pass
FESA-REQ-SHELL-PRESSURE-024	Reaction CSV review-only, stress CSV excluded, internal balance 유지	T-REF-COMPARE; no reaction/stress verdict family	shellnl-meshfine-pressure-s4-follower	reference-comparison.md, physics-evaluation.md	constraint/pass

Trace result: must requirements 24, release-scoped rows 24, orphan 0, deferred must 0, missing feature-required comparison files 0.

5. Validation Evidence

evidence	command / source	result
Configure	cmake --fresh -S . -B .harness/build -G "Visual Studio 18 2026" -A x64 ...	exit 0; MSVC 19.51.36252.0
Focused build	cmake --build .harness/build --config Debug --target fesa_unit_tests fesa_integration_tests fesa_reference_tests	exit 0; new warning 0
Discovery	ctest --test-dir .harness/build -C Debug --show-only=json-v1	362 discovered, feature suites nonzero
Focused CTest	`ctest --test-dir .harness/build -C Debug --output-on-failure -R "^(InpSyntax	ShellSurfacePressureInput
FESA reference execution	fesa.exe .harness/build/reference/shell-surface-pressure-load/shellNL-meshfine-pressure.inp	exit 0; factor-one increment accepted; schema-1 HDF5 atomic publish
Pressure comparison	ctest --test-dir .harness/build -C Debug --output-on-failure -R "^ShellSurfacePressureReference\."	9/9 PASS before and after generated HDF5
Automatic Stop build	cmake --build .harness/build --config Debug	PASS
Automatic Stop full CTest	ctest --test-dir .harness/build -C Debug --output-on-failure	362/362 PASS, 0 failed
Harness Python pytest	N/A	Harness/Python behavior 및 file 변경이 없어 upstream plan/report에서 적용 대상이 아님

Reference artifact pre/post evidence:

• Required input: SHA-256 53718ccc9b41c23fcc1b509a51d66f1347e87aca43a74f1d6cec4d2085f4b90e, 56,665 bytes, unchanged.
• Required displacement CSV: SHA-256 2fe53f98eac9f04779100721c3edf8049eb1dbfe733ebcbd819aeeed03b81198, 111,182 bytes, unchanged.
• pressure_nodal_translation_blocking: 2187/2187 rows pass, relative RMS 5.18831997081359e-5 <= 0.01.
• pressure_nodal_rotation_warning: 2187/2187 rows pass, relative RMS 3.10406152731217e-4 <= 0.01; warning 0.
• Accepted free translation residual: 6.12848863188238e-11 <= 1e-2.
• Accepted free rotation residual: zero-external-scale branch 1.3758908607997e-6 <= 1e-3.
• Physics re-evaluation: normalized force balance 6.758e-14, moment balance 3.725e-14, each <=1e-8.

6. Known Limitations

1. 입력은 assembly-level TYPE=ELEMENT surface와 uniform DSLOAD P의 승인 subset뿐이다. *DLOAD, P n, PNU, HP, VP, SP, TRVEC, TRSHR, nonuniform/user pressure, AMPLITUDE, FOLLOWER, OP, REF NODE, *INCLUDE와 승인되지 않은 parameter는 지원하지 않는다.
2. Surface는 single-sided SPOS|SNEG four-node S4/S4R만 지원한다. Node/edge/double-sided, analytical/contact surface, part-level surface, implicit/mixed-instance ELSET, transformed instance, S3/S8/solid/continuum-shell/membrane/beam/rigid element는 범위 밖이다.
3. 단일 linear static 또는 단일 approved NLGEOM=YES full-Newton static step만 지원한다. Dynamics, thermal, contact, buckling perturbation, cavity/pipe pressure와 multiple-step propagation은 제외된다.
4. 기존 linear isotropic elastic MITC4 material/section만 사용한다. Material nonlinearity, composite/hyperelastic/plastic section, surface offset, thickness-face arm/correction 및 pressure distributed couple은 지원하지 않는다.
5. Pressure는 midsurface translational generalized force를 만든다. Rotational pressure entries는 exact zero이며 physical global moment는 force arm으로 평가한다. Invalid/collapsed/folded current surface는 tau_J=1.0e-12 gate에서 fail-closed한다.
6. Authoritative output은 기존 <stem>_results.h5뿐이며 surface/load 또는 pressure-only dataset은 추가되지 않는다. CSV는 product output이 아니다.
7. Stored external case는 S4, SPOS, positive P=1e6, NLGEOM=YES nonlinear displacement만 직접 검증한다. S4R, SNEG, negative/zero pressure, linear path, objectivity와 tangent는 passing blocking internal tests로 보완되며 별도 external reference case는 없다.
8. UR1/UR2/UR3 external comparison은 contract상 warning-only다. 이번 evidence에서는 모두 통과했지만 향후 warning-only mismatch는 blocking U verdict를 바꾸지 않는다.
9. Reaction CSV는 review-only, stress CSV는 excluded다. Local reaction distribution이나 stress agreement을 external acceptance로 주장하지 않으며 internal residual/equilibrium gate를 사용한다.
10. 직접 적용 가능한 public S4/S4R follower-pressure benchmark가 없다는 연구 한계가 있다. Analytical/kernel/solution tests와 exact stored case로 보완했으며 실험 validation을 주장하지 않는다.
11. FESA는 독립 solver다. Abaqus를 포함한 다른 solver의 내부 formulation, quadrature, stabilization, tangent 또는 result-generation equivalence를 주장하지 않는다.

Deferred must requirement, unresolved defect, accepted blocking risk 또는 release-blocking open item은 없다.

7. Release Notes Draft

사용자-facing 요약

FESA는 이제 승인된 Abaqus .inp subset에서 assembly named element surface의 S4/S4R SPOS 또는 SNEG 면에 uniform *DSLOAD P를 적용할 수 있다. Linear static에서는 reference surface를, NLGEOM=YES nonlinear static에서는 current surface follower force와 consistent external tangent를 사용한다. Pressure는 기존 full-space load, reaction/free residual, global equilibrium 및 HDF5 result lifecycle에 통합된다.

검증 범위

• MSVC x64 Debug full CTest 362/362 PASS, focused feature tests 64/64 PASS.
• Exact stored nonlinear case에서 factor-one U blocking 2187/2187, UR warning-only 2187/2187 rows pass.
• Factor-one normalized global force/moment balance는 각각 6.758e-14, 3.725e-14로 승인 gate 1e-8을 통과했다.
• S4R, side/sign reversal, linear reference pressure, current-area objectivity, external tangent와 invalid geometry는 독립 internal analytical/FD/fail-closed tests로 검증했다.

주요 제한 및 사용 주의

이 release는 single-step linear 또는 approved nonlinear static, four-node S4/S4R, existing linear-isotropic MITC4 section과 uniform single-sided pressure만 지원한다. *DLOAD, nonuniform pressure, amplitude, node/edge/contact/double-sided surface, 다른 element/procedure/material 및 surface offset/thickness correction은 지원하지 않는다. Model-consistent unit system을 사용해야 하며 invalid current surface geometry는 fail-closed한다. UR은 warning-only이고 reaction/stress CSV는 external verdict 대상이 아니다. Abaqus 내부 동등성이나 실험 validation은 주장하지 않는다.

Artifact paths

• Runtime authoritative output: input lexical sibling <stem>_results.h5
• Required reference input: reference/shellNL-meshfine-pressure/shellNL-meshfine-pressure.inp
• Required comparison CSV: reference/shellNL-meshfine-pressure/shellNL-meshfine-pressure displacements.csv
• Release record: docs/shell-surface-pressure-load/release.md

8. Release Verdict

Verdict: ready-for-release.

필수 upstream gate, full build/test, blocking reference comparison과 physics evaluation이 모두 통과했다. Must requirement 24/24가 release scope, acceptance criterion, implementation/test 또는 applicable reference evidence와 최종 disposition에 연결되고, known limitations가 release notes에 포함되었다. Missing/failed/stale required evidence, unresolved defect, missing comparison file, tolerance conflict 또는 physics blocker는 없다.

이 verdict는 FESA 내부 feature delivery closure recommendation이며 외부 release 행위를 승인하지 않는다.

9. Handoff Recommendation

Coordinator Agent는 Gate 8을 passed로 기록하고 shell-surface-pressure-load workflow를 내부적으로 closure하는 것을 권고한다. 추가 Correction, Implementation, Physics Evaluation 또는 upstream decision return은 필요하지 않다. Publish, deploy, package, tag, merge, commit, push 또는 external release는 별도 명시적 권한 없이는 수행하지 않는다.

10. No-Change Assertion

Release Agent는 이 감사에서 docs/shell-surface-pressure-load/release.md만 생성했다. Source, public/private header, test, CMake, build/Harness configuration, phase files, upstream feature documents/reports, coordination.md, reference input/CSV, generated HDF5/log, docs/TOLERANCE.md 및 tolerance policy는 수정하지 않았다. Abaqus, Nastran 또는 다른 reference solver를 실행하지 않았고 build, CTest, Harness 또는 FESA CLI를 재실행하지 않았다.

11. Open Issues

• Missing evidence: 없음.
• Contradictory upstream verdict/status/value: 없음. Archival pre-gate metadata와 compact trace shorthand는 Coordinator 승인 및 actual passing evidence로 교차 확인되었다.
• Unresolved defects or failed corrections: 없음. Harness duplicate-verification timeout correction은 이후 automatic Stop full 362/362 PASS로 해소되었다.
• Missing declared comparison files or mappings: 없음.
• Release documentation gap: 없음.
• Blockers: 없음.