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8b14f6e800ab1db86efc79653da050a2ca5d203a
Atomizer/studies/simple_beam_optimization/substudies/benchmarking/benchmark_results.json
Anto01 8b14f6e800 feat: Add robust NX expression import system for all expression types 
Major Enhancement:
- Implemented .exp file-based expression updates via NX journal scripts
- Fixes critical issue with feature-linked expressions (e.g., hole_count)
- Supports ALL NX expression types including binary-stored ones
- Full 4D design space validation completed successfully

New Components:
1. import_expressions.py - NX journal for .exp file import
   - Uses NXOpen.ExpressionCollection.ImportFromFile()
   - Replace mode overwrites existing values
   - Automatic model update and save
   - Comprehensive error handling

2. export_expressions.py - NX journal for .exp file export
   - Exports all expressions to text format
   - Used for unit detection and verification

3. Enhanced nx_updater.py
   - New update_expressions_via_import() method
   - Automatic unit detection from .exp export
   - Creates study-variable-only .exp files
   - Replaces fragile binary .prt editing

Technical Details:
- .exp Format: [Units]name=value (e.g., [MilliMeter]beam_length=5000)
- Unitless expressions: name=value (e.g., hole_count=10)
- Robustness: Native NX functionality, no regex failures
- Performance: < 1 second per update operation

Validation:
- Simple Beam Optimization study (4D design space)
  * beam_half_core_thickness: 10-40 mm
  * beam_face_thickness: 10-40 mm
  * holes_diameter: 150-450 mm
  * hole_count: 5-15 (integer)

Results:
✅ 3-trial validation completed successfully
✅ All 4 variables update correctly in all trials
✅ Mesh adaptation verified (hole_count: 6, 15, 11 → different mesh sizes)
✅ Trial 0: 5373 CQUAD4 elements (6 holes)
✅ Trial 1: 5158 CQUAD4 + 1 CTRIA3 (15 holes)
✅ Trial 2: 5318 CQUAD4 (11 holes)

Problem Solved:
- hole_count expression was not updating with binary .prt editing
- Expression stored in feature parameter, not accessible via text regex
- Binary format prevented reliable text-based updates

Solution:
- Use NX native expression import/export
- Works for ALL expressions (text and binary-stored)
- Automatic unit handling
- Model update integrated in journal

Documentation:
- New: docs/NX_EXPRESSION_IMPORT_SYSTEM.md (comprehensive guide)
- Updated: CHANGELOG.md with Phase 3.2 progress
- Study: studies/simple_beam_optimization/ (complete example)

Files Added:
- optimization_engine/import_expressions.py
- optimization_engine/export_expressions.py
- docs/NX_EXPRESSION_IMPORT_SYSTEM.md
- studies/simple_beam_optimization/ (full study)

Files Modified:
- optimization_engine/nx_updater.py
- CHANGELOG.md

Compatibility:
- NX 2412 tested and verified
- Python 3.10+
- Works with all NX expression types

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-17 12:34:06 -05:00

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{
"timestamp": "2025-11-17T11:18:28.329069",
"expressions": {
"Pattern_p7": {
"value": null,
"units": "",
"formula": "hole_count",
"type": "Number"
},
"Pattern_p8": {
"value": 444.444444444444,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"Pattern_p9": {
"value": null,
"units": "MilliMeter",
"formula": "p6",
"type": "Number"
},
"Pattern_p10": {
"value": 1.0,
"units": "",
"formula": null,
"type": "Number"
},
"Pattern_p11": {
"value": 10.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"Pattern_p12": {
"value": 0.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"beam_face_thickness": {
"value": 20.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"beam_half_core_thickness": {
"value": 20.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"beam_half_height": {
"value": 250.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"beam_half_width": {
"value": 150.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"beam_lenght": {
"value": 5000.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"hole_count": {
"value": 10.0,
"units": "",
"formula": null,
"type": "Number"
},
"holes_diameter": {
"value": 300.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"p4": {
"value": null,
"units": "MilliMeter",
"formula": "beam_lenght",
"type": "Number"
},
"p5": {
"value": 0.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"p6": {
"value": 4000.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"p13": {
"value": 0.0,
"units": "Degrees",
"formula": null,
"type": "Number"
},
"p19": {
"value": 4000.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"p34": {
"value": 4000.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"p50": {
"value": 4000.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"p119": {
"value": 4000.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"p130": {
"value": 10.0,
"units": "",
"formula": null,
"type": "Number"
},
"p132": {
"value": 444.444444444444,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"p134": {
"value": 4000.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"p135": {
"value": 4000.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"p137": {
"value": 1.0,
"units": "",
"formula": null,
"type": "Number"
},
"p139": {
"value": 10.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"p141": {
"value": 0.0,
"units": "MilliMeter",
"formula": null,
"type": "Number"
},
"p143": {
"value": 0.0,
"units": "Degrees",
"formula": null,
"type": "Number"
},
"p173": {
"value": 973.968443678471,
"units": "Kilogram",
"formula": null,
"type": "Number"
}
},
"expression_count": 30,
"element_types": [
"CQUAD4"
],
"result_types": [
"displacement",
"stress"
],
"subcases": [
1
],
"node_count": 0,
"element_count": 0,
"baseline_op2_path": "studies\\simple_beam_optimization\\model\\beam_sim1-solution_1.op2",
"baseline_results": {},
"simulation_works": true,
"extraction_works": true,
"validation_passed": true,
"proposed_design_variables": [
{
"parameter": "Pattern_p7",
"current_value": null,
"units": "",
"suggested_range": "\u00b120% of None "
},
{
"parameter": "Pattern_p8",
"current_value": 444.444444444444,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 444.444444444444 MilliMeter"
},
{
"parameter": "Pattern_p9",
"current_value": null,
"units": "MilliMeter",
"suggested_range": "\u00b120% of None MilliMeter"
},
{
"parameter": "Pattern_p10",
"current_value": 1.0,
"units": "",
"suggested_range": "\u00b120% of 1.0 "
},
{
"parameter": "Pattern_p11",
"current_value": 10.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 10.0 MilliMeter"
},
{
"parameter": "Pattern_p12",
"current_value": 0.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 0.0 MilliMeter"
},
{
"parameter": "beam_face_thickness",
"current_value": 20.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 20.0 MilliMeter"
},
{
"parameter": "beam_half_core_thickness",
"current_value": 20.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 20.0 MilliMeter"
},
{
"parameter": "beam_half_height",
"current_value": 250.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 250.0 MilliMeter"
},
{
"parameter": "beam_half_width",
"current_value": 150.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 150.0 MilliMeter"
},
{
"parameter": "beam_lenght",
"current_value": 5000.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 5000.0 MilliMeter"
},
{
"parameter": "hole_count",
"current_value": 10.0,
"units": "",
"suggested_range": "\u00b120% of 10.0 "
},
{
"parameter": "holes_diameter",
"current_value": 300.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 300.0 MilliMeter"
},
{
"parameter": "p4",
"current_value": null,
"units": "MilliMeter",
"suggested_range": "\u00b120% of None MilliMeter"
},
{
"parameter": "p5",
"current_value": 0.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 0.0 MilliMeter"
},
{
"parameter": "p6",
"current_value": 4000.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 4000.0 MilliMeter"
},
{
"parameter": "p13",
"current_value": 0.0,
"units": "Degrees",
"suggested_range": "\u00b120% of 0.0 Degrees"
},
{
"parameter": "p19",
"current_value": 4000.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 4000.0 MilliMeter"
},
{
"parameter": "p34",
"current_value": 4000.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 4000.0 MilliMeter"
},
{
"parameter": "p50",
"current_value": 4000.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 4000.0 MilliMeter"
},
{
"parameter": "p119",
"current_value": 4000.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 4000.0 MilliMeter"
},
{
"parameter": "p130",
"current_value": 10.0,
"units": "",
"suggested_range": "\u00b120% of 10.0 "
},
{
"parameter": "p132",
"current_value": 444.444444444444,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 444.444444444444 MilliMeter"
},
{
"parameter": "p134",
"current_value": 4000.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 4000.0 MilliMeter"
},
{
"parameter": "p135",
"current_value": 4000.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 4000.0 MilliMeter"
},
{
"parameter": "p137",
"current_value": 1.0,
"units": "",
"suggested_range": "\u00b120% of 1.0 "
},
{
"parameter": "p139",
"current_value": 10.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 10.0 MilliMeter"
},
{
"parameter": "p141",
"current_value": 0.0,
"units": "MilliMeter",
"suggested_range": "\u00b120% of 0.0 MilliMeter"
},
{
"parameter": "p143",
"current_value": 0.0,
"units": "Degrees",
"suggested_range": "\u00b120% of 0.0 Degrees"
},
{
"parameter": "p173",
"current_value": 973.968443678471,
"units": "Kilogram",
"suggested_range": "\u00b120% of 973.968443678471 Kilogram"
}
],
"proposed_extractors": [
{
"action": "extract_displacement",
"description": "Extract displacement results from OP2 file",
"params": {
"result_type": "displacement"
}
},
{
"action": "extract_solid_stress",
"description": "Extract stress from CQUAD4 elements",
"params": {
"result_type": "stress",
"element_type": "cquad4"
}
}
],
"proposed_objectives": [
"max_displacement (minimize or maximize)",
"max_von_mises (minimize for safety)"
],
"warnings": [],
"errors": []
}
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