feat: Implement complete FEM regeneration workflow
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>
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@@ -62,63 +62,74 @@ def main(args):
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simPart1 = workSimPart
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theSession.Post.UpdateUserGroupsFromSimPart(simPart1)
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# Reload all components to pick up parameter changes from .prt files
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print("[JOURNAL] Reloading components to pick up .prt parameter changes...")
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# STEP 1: Switch to Bracket.prt and update geometry with new expression values
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print("[JOURNAL] STEP 1: Updating Bracket.prt geometry...")
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try:
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workSimPart.ComponentAssembly.ReloadComponents(
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NXOpen.Assemblies.ComponentAssembly.ReloadOption.AllLoaded
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)
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print("[JOURNAL] Components reloaded")
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# Find the Bracket part
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bracketPart = theSession.Parts.FindObject("Bracket")
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if bracketPart:
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# Make Bracket the active display part
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status, partLoadStatus = theSession.Parts.SetActiveDisplay(
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bracketPart,
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NXOpen.DisplayPartOption.AllowAdditional,
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NXOpen.PartDisplayPartWorkPartOption.UseLast
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)
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partLoadStatus.Dispose()
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# CRITICAL: Update the geometry model - rebuilds features with new expressions
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markId_update = theSession.SetUndoMark(NXOpen.Session.MarkVisibility.Invisible, "NX update")
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nErrs = theSession.UpdateManager.DoUpdate(markId_update)
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theSession.DeleteUndoMark(markId_update, "NX update")
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print(f"[JOURNAL] Bracket geometry updated ({nErrs} errors)")
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else:
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print("[JOURNAL] WARNING: Could not find Bracket part")
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except Exception as e:
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print(f"[JOURNAL] Warning: Could not reload components: {e}")
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print(f"[JOURNAL] ERROR updating Bracket.prt: {e}")
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# Make FEM work component (to ensure it's updated)
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# Find the FEM component - pattern: "COMPONENT <name>_fem1 1"
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markId1 = theSession.SetUndoMark(NXOpen.Session.MarkVisibility.Visible, "Make Work Part")
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# STEP 2: Switch to Bracket_fem1 and update FE model
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print("[JOURNAL] STEP 2: Opening Bracket_fem1.fem...")
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try:
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# Find the FEM part
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femPart1 = theSession.Parts.FindObject("Bracket_fem1")
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if femPart1:
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# Make FEM the active display part
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status, partLoadStatus = theSession.Parts.SetActiveDisplay(
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femPart1,
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NXOpen.DisplayPartOption.AllowAdditional,
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NXOpen.PartDisplayPartWorkPartOption.SameAsDisplay
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)
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partLoadStatus.Dispose()
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# Get all components and find the FEM one
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rootComponent = workSimPart.ComponentAssembly.RootComponent
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femComponent = None
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workFemPart = theSession.Parts.BaseWork
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for component in rootComponent.GetChildren():
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if "_fem" in component.DisplayName.lower():
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femComponent = component
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break
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# CRITICAL: Update FE Model - regenerates FEM with new geometry from Bracket.prt
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print("[JOURNAL] Updating FE Model...")
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fEModel1 = workFemPart.FindObject("FEModel")
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if fEModel1:
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fEModel1.UpdateFemodel()
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print("[JOURNAL] FE Model updated with new geometry!")
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else:
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print("[JOURNAL] WARNING: Could not find FEModel object")
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else:
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print("[JOURNAL] WARNING: Could not find Bracket_fem1 part")
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except Exception as e:
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print(f"[JOURNAL] ERROR updating FEM: {e}")
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import traceback
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traceback.print_exc()
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if femComponent:
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print(f"[JOURNAL] Switching to FEM component: {femComponent.DisplayName}")
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# Make FEM the work component (this is what your recorded journal does)
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partLoadStatus2 = theSession.Parts.SetWorkComponent(
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femComponent,
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NXOpen.PartCollection.RefsetOption.Entire,
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NXOpen.PartCollection.WorkComponentOption.Visible
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)
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partLoadStatus2.Dispose()
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# Get the FEM part and try to update it
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workFemPart = theSession.Parts.BaseWork
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try:
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# Try to update the FEM to pick up geometry/parameter changes
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print("[JOURNAL] Updating FEM to recognize parameter changes...")
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if hasattr(workFemPart, 'FemPart'):
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workFemPart.FemPart.UpdateFeModel()
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print("[JOURNAL] FEM updated")
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except Exception as e:
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print(f"[JOURNAL] Note: Could not update FEM (may not be necessary): {e}")
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# Switch back to sim part (this forces NX to recognize updates)
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markId2 = theSession.SetUndoMark(NXOpen.Session.MarkVisibility.Visible, "Make Work Part")
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partLoadStatus3 = theSession.Parts.SetWorkComponent(
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NXOpen.Assemblies.Component.Null,
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NXOpen.PartCollection.RefsetOption.Entire,
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NXOpen.PartCollection.WorkComponentOption.Visible
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# STEP 3: Switch back to sim part
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print("[JOURNAL] STEP 3: Switching back to sim part...")
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try:
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status, partLoadStatus = theSession.Parts.SetActiveDisplay(
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simPart1,
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NXOpen.DisplayPartOption.AllowAdditional,
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NXOpen.PartDisplayPartWorkPartOption.UseLast
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)
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partLoadStatus.Dispose()
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workSimPart = theSession.Parts.BaseWork
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partLoadStatus3.Dispose()
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print("[JOURNAL] Switched back to sim part")
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else:
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print("[JOURNAL] WARNING: No FEM component found, proceeding with solve anyway")
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print("[JOURNAL] Switched back to sim part")
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except Exception as e:
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print(f"[JOURNAL] WARNING: Error switching to sim part: {e}")
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# Note: Old output files are deleted by nx_solver.py before calling this journal
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# This ensures NX performs a fresh solve
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