Antoine
6f3325d86f
Bug 1 — Journal (solve_simulation.py simple workflow): Expression lookup for p173 fails silently for derived/measurement expressions, so _temp_mass.txt was never written. Added MeasureManager fallback via extract_part_mass() (already used in assembly workflow). Bug 2 — Extractor (extract_mass_from_expression.py): Journal writes 'p173=<value>' format but extractor tried float() on the whole content including 'p173='. Added key=value parsing. Defense in depth — nx_interface.py: Added stdout parsing fallback: if _temp_mass.txt still missing, parse mass from journal output captured via solver.py stdout passthrough. Files changed: - optimization_engine/nx/solve_simulation.py — MeasureManager fallback - optimization_engine/extractors/extract_mass_from_expression.py — key=value parse - optimization_engine/nx/solver.py — include stdout in result dict - projects/hydrotech-beam/studies/01_doe_landscape/nx_interface.py — stdout fallback Tags: hydrotech-beam, mass-extraction
Hydrotech Beam — Structural Optimization
Client: Hydrotech (internal test fixture) Channel: #project-hydrotech-beam Created: 2026-02-08 Status: Technical Breakdown Complete — Awaiting Gap Resolution
Objective
Optimize a sandwich I-beam with lightening holes: minimize mass while meeting stiffness and strength constraints.
Key Numbers
| Metric | Baseline | Target |
|---|---|---|
| Mass | ~974 kg | Minimize |
| Tip displacement | ~22 mm | ≤ 10 mm |
| Von Mises stress | TBD | ≤ 130 MPa |
Design Variables
| Variable | Range | Type |
|---|---|---|
| Half-core thickness | 10–40 mm | Continuous |
| Face thickness | 10–40 mm | Continuous |
| Hole diameter | 150–450 mm | Continuous |
| Hole count | 5–15 | Integer |
Approach
Two-phase optimization:
- DoE (LHS, 40–50 trials) — map the landscape
- TPE (Bayesian, 60–100 trials) — converge to optimum
Total budget: ~100–150 NX evaluations, est. 2–5 hours compute.
Project Structure
hydrotech-beam/
├── README.md ← You are here
├── CONTEXT.md # Intake requirements
├── BREAKDOWN.md # Technical analysis
├── DECISIONS.md # Decision log
├── models/ # Reference NX models (golden copies)
├── kb/ # Living knowledge base
│ ├── components/ # Per-component knowledge
│ ├── materials/ # Material data
│ ├── fea/ # FEA model knowledge
│ └── dev/ # Generation documents
├── images/ # Screenshots, plots, renders
├── studies/ # Optimization campaigns
│ └── 01_doe_landscape/ # (first study — pending)
└── deliverables/ # Final reports and recommendations
Key Documents
- CONTEXT.md — Full intake data
- BREAKDOWN.md — Tech Lead's technical analysis
- DECISIONS.md — All project decisions
- kb/_index.md — Knowledge base overview
Team
| Role | Agent | Status |
|---|---|---|
| Manager | 🎯 Manager | Coordinating |
| Technical Lead | 🔧 Tech Lead | Breakdown complete |
| CEO | Antoine | Gap resolution pending |