This commit completes the optimization loop infrastructure by implementing
the full FEM regeneration workflow based on the user's working journal.
## Changes
### FEM Regeneration Workflow (solve_simulation.py)
- Added STEP 1: Switch to Bracket.prt and update geometry
- Uses SetActiveDisplay() to make Bracket.prt active
- Calls UpdateManager.DoUpdate() to rebuild CAD geometry with new expressions
- Added STEP 2: Switch to Bracket_fem1 and update FE model
- Uses SetActiveDisplay() to make FEM active
- Calls fEModel1.UpdateFemodel() to regenerate FEM with updated geometry
- Added STEP 3: Switch back to sim part before solving
- Close and reopen .sim file to force reload from disk
### Enhanced Journal Output (nx_solver.py)
- Display journal stdout output for debugging
- Shows all journal steps: geometry update, FEM regeneration, solve, save
- Helps verify workflow execution
### Verification Tools
- Added verify_parametric_link.py journal to check expression dependencies
- Added FEM_REGENERATION_STATUS.md documenting the complete status
## Status
### ✅ Fully Functional Components
1. Parameter updates - nx_updater.py modifies .prt expressions
2. NX solver - ~4s per solve via journal
3. Result extraction - pyNastran reads .op2 files
4. History tracking - saves to JSON/CSV
5. Optimization loop - Optuna explores parameter space
6. **FEM regeneration workflow** - Journal executes all steps successfully
### ❌ Remaining Issue: Expressions Not Linked to Geometry
The optimization returns identical stress values (197.89 MPa) for all trials
because the Bracket.prt expressions are not referenced by any geometry features.
Evidence:
- Journal verification shows FEM update steps execute successfully
- Feature dependency check shows no features reference the expressions
- All optimization infrastructure is working correctly
The code is ready - waiting for Bracket.prt to have its expressions properly
linked to the geometry features in NX.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Added bracket_sim1-solution_1.dat (Nastran input file) to tests.
This is the SOL 101 Linear Statics input for the Bracket model.
Analysis Setup:
- Solution: SOL 101 Linear Statics
- Loads: ~1000N total force in -Z direction (3 application points)
- Constraints: Fixed supports at base (40+ nodes)
- Mesh: ~585 elements (CTETRA)
- Material: Aluminum 6061-T6
- Units: mm, mN (milli-newton), kg
Note: This is the INPUT file. To test the OP2 extractor, the
corresponding OUTPUT file (bracket_sim1-solution_1.op2) is needed,
which is generated by running the solver in NX Simcenter.
