Pipe Assembly Lab v1.3: four power-piping research sections, FE operators and validation

POWER_CASES.md

@@ -0,0 +1,78 @@
+# Power-piping research cases · v1.3
+
+Four service families provide reusable **solid-FE component operators**, rather
+than attaching service names to the old small-pipe library. Each family has
+three straight lengths (3D, 5D, 8D) and three 90° bends (R/D = 1.5, 2, 3).
+Each bend also contains a 2D tangent at both ends. Layouts are researcher-designed.
+
+| Research family | OD × wall / mm | E / GPa | α / µm/(m·K) | Example ΔT / K |
+|---|---:|---:|---:|---:|
+| Main steam / 主蒸汽 | 450 × 60 | 170 | 13 | 546 |
+| Hot reheat / 再热热段 | 800 × 30 | 170 | 13 | 546 |
+| Cold reheat / 再热冷段 | 800 × 20 | 190 | 12.5 | 330 |
+| High-pressure feedwater / 高压给水 | 450 × 50 | 195 | 12.5 | 280 |
+
+## Provenance and assumptions
+
+The **main-steam cross-section only** derives from Gao & Huo, *Feasibility
+Research on Ultra-supercritical 350 MW Unit and Analysis of Main Equipment
+Parameter*, Table 9: 330 mm bore and 60 mm calculated wall, excluding corrosion
+allowance. The derived OD is 450 mm. It is not a purchased/as-built pipe size.
+Source: https://doi.org/10.16516/j.gedi.issn2095-8676.2019.04.007
+
+The other three cross-sections are **author-selected benchmark geometries**.
+All tabled effective E and α values, temperature rises, layouts, springs,
+damper settings and forces are **benchmark assumptions**, not values extracted
+from that paper, certified grade-specific material data, or measured plant data.
+Density is 7850 kg/m³ and Poisson ratio 0.3. ΔT is a uniform imposed wall
+temperature rise, not an absolute operating temperature or a transient history.
+Material constants remain fixed when ΔT is varied.
+
+The service taxonomy follows main steam, hot reheat, cold reheat and main
+feedwater. Context: National Energy Administration,
+https://www.nea.gov.cn/2011-02/14/c_131071160.htm
+
+## Models and records
+
+- 24 new components, 35,280 displacement DOFs each; Q2 displacement on a Q1
+  hexahedral geometry, 24 axial × 24 circumferential × 2 radial cells.
+- 12 rigid mechanical port DOFs plus 12 fixed-interface modes per component.
+- 108 assembly records: four families × three layouts × three support choices
+  × three temperature rises. Labels come from the assembled component ROM.
+- 12 harmonic sweeps: four families × three support choices, with a 1000 N
+  peak Y force at the final joint, assumed 2% modal damping, and a 10,000 N·s/m
+  grounded Y damper at that same joint. Their excitation frequency is f1.
+- UI initial layouts use springs at joints 3 and 5; they are editable examples,
+  not identical to every dataset layout or an optimized support design.
+- Original 48 components and 512 assembly records remain intact.
+
+Mass and unconstrained axial expansion are checked analytically. Python/SciPy
+and browser assembly are compared for all 108 records. Harmonic response is
+checked against an independent complex solve, including 12/24 system-mode
+retention. Four R/D=3 bends are compared against 30 × 32 × 3 meshes (81,984
+DOFs). The refinement check covers isolated bends, not every route, stress,
+or higher mode. Reports state each metric explicitly.
+
+## Scope
+
+These are dry-pipe, small-displacement linear elastic models. No pressure
+stiffening, fluid/insulation mass, spring preload, gaps/friction, creep, fatigue,
+thermal gradients or piping-code acceptance calculation is included. A viscous
+damper is not a hydraulic snubber. Displayed response is centreline motion, not
+wall stress. This release supports reproducible geometry/support studies and
+operator reuse; it is not a plant digital-twin calibration or design sign-off.
+
+## Reproduce
+
+With the AgentFEM/DOLFINx environment: `python src/generate_power.py`, then
+`python src/validate_power.py` and `python src/check_power_mesh.py`.
+With Node.js: `node src/check_power.cjs`.
+With NumPy/SciPy: `python src/check_power_harmonic.py`.
+The data/model repositories include the required operator data and source;
+the Space contains only compact browser operators and needs no Python backend.
+
+## 中文说明
+
+本版增加的是可复用、可验证的四大管道研究组件。主蒸汽截面有公开计算尺寸
+来源；其他截面和工况为研究设定。先研究管路走向、支撑位置和刚度对热位移、
+接口载荷与振动的影响，不将结果用作现场管道的安全判定。

PROJECT_FORMAT.md

@@ -1,8 +1,8 @@
-# Pipe project and dynamic response · v1.2
+# Pipe project and dynamic response · v1.3
 
 A saved project is JSON, not executable code. All stored numbers use SI units.
-`schema` is `agentfem.pipe-project/1`; `modelVersion` is `1.2.0`.
-Version 1.1.0 imports remain supported and receive default excitation settings.
+`schema` is `agentfem.pipe-project/1`; `modelVersion` is `1.3.0`.
+Version 1.1.0 and 1.2.0 imports remain supported and receive default excitation settings.
 Optional `design.excitation` is `{node:3, axis:2, force:100, frequency:10, zeta:0.02}`.
 The harmonic force and probe share a joint and global direction. SI units, peak
 amplitude, not RMS. The added damper retains independent position/direction.
@@ -10,7 +10,7 @@ amplitude, not RMS. The added damper retains independent position/direction.
 ```json
 {
   "schema": "agentfem.pipe-project/1",
-  "modelVersion": "1.2.0",
+  "modelVersion": "1.3.0",
   "units": "SI",
   "design": {
     "route": [
@@ -77,3 +77,10 @@ forces/moments, along with material constants, model version and complete projec
 settings. Print-to-PDF uses the browser. CSV includes port translations, support
 forces/moments and, when a dynamic run exists, its time histories. The reference
 and current designs are included in the printable report.
+
+## Power sections
+
+v1.3 additionally accepts (OD,wall thickness) = (0.45,0.06), (0.8,0.03),
+(0.8,0.02), (0.45,0.05) metres. Store wall as thickness/OD. Only those exact
+pairs are available; ΔT is 0–600 K for these research sections. Generic pipes
+retain the 0–200 K range. See POWER_CASES.md for their fixed material constants.

README.md

@@ -32,10 +32,40 @@ configs:
   data_files:
   - split: validation
     path: dynamics/harmonic_cases.jsonl
+- config_name: power_assemblies
+  data_files:
+  - split: benchmark
+    path: assemblies/power_sections.jsonl
+- config_name: power_components
+  data_files:
+  - split: components
+    path: power_manifest.jsonl
 ---
 
 # AgentFEM Pipe Components
 
+## v1.3 — Power-piping research sections
+
+**Four pipe services, 24 new solid-FE components, 108 assembly records.**
+
+Main steam, hot reheat, cold reheat and high-pressure feedwater now have
+independently assembled component operators. The Space switches section geometry,
+stiffness, mass and effective thermal expansion together. It includes thermal
+movement, support reactions, modes, free decay and forced-response comparison.
+
+The main-steam section uses a published calculated bore/wall pair; other sections
+and all effective material constants, layouts and loads are benchmark assumptions.
+See [case definitions and provenance](POWER_CASES.md). This is still a dry-pipe,
+constant-property research model, not plant design approval.
+
+New validation: 108 independent Python/browser comparisons, 12 harmonic sweeps,
+and four refined-bend mesh checks. Original records are preserved. The complete
+library now contains **72 components**. Data and operators use CC BY 4.0;
+solver/example code retains its existing Apache-2.0 license.
+
+中文：新增主蒸汽、再热热段、再热冷段和高压给水四类研究截面。可比较管路、
+支撑与阻尼器设置对热位移和振动的影响。尺寸来源、研究假设与验证报告一并提供。
+
 ## v1.2 — thermal movement and forced vibration
 
 Adds **19 harmonic-response sweeps**, including a blocked-force-direction control.

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