148 lines
3.7 KiB
Markdown
148 lines
3.7 KiB
Markdown
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# Study Report — 01_v1_tpe: Isogrid Mass Minimization
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**Study:** isogrid_01_v1_tpe
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**Project:** Isogrid Dev Plate (ACS Stack Main Plate)
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**Algorithm:** Optuna TPE, seed=42
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**Budget:** 200 trials
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**Date started:** [TBD]
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**Date completed:** [TBD]
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**Author:** Antoine + Atomizer
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---
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## Executive Summary
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| Metric | Value |
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|--------|-------|
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| Status | [TBD — Not started / Running / Complete] |
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| Trials completed | [TBD] / 200 |
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| Best mass | [TBD] kg |
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| Best trial # | [TBD] |
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| Convergence trial | [TBD] (when best was first found) |
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| Best σ_max | [TBD] MPa |
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| Best SF | [TBD] (target ≥ 5.0) |
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| Feasibility rate | [TBD] % |
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| Total runtime | [TBD] h |
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| Avg time/trial | [TBD] s |
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---
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## Best Design Found
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### Parameters
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| Variable | Value | Range |
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|----------|-------|-------|
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| `eta_0` | [TBD] | [0.0, 0.4] |
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| `alpha` | [TBD] | [0.3, 2.0] |
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| `beta` | [TBD] | [0.0, 1.0] |
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| `gamma_stress` | [TBD] | [0.0, 1.5] |
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| `R_0` | [TBD] mm | [10, 100] |
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| `R_edge` | [TBD] mm | [5, 40] |
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| `s_min` | [TBD] mm | [8, 20] |
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| `s_max` | [TBD] mm | [25, 60] |
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### Results
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| Metric | Value |
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|--------|-------|
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| Mass | [TBD] kg ([TBD] g) |
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| Max von Mises | [TBD] MPa |
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| Safety factor | [TBD] |
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| Feasible | [TBD] |
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| Total pockets | [TBD] (sandbox_1 + sandbox_2) |
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### Trial folder
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```
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2_iterations/trial_[TBD]/
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├── params.json
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├── results.json
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├── rib_profile_sandbox_1.json
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└── rib_profile_sandbox_2.json
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```
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---
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## Optimization Progress
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### Trial Statistics
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| Metric | Value |
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|--------|-------|
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| Total trials | [TBD] |
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| Feasible trials | [TBD] ([TBD] %) |
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| Failed trials (error) | [TBD] |
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| Min objective | [TBD] |
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| Median objective | [TBD] |
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| Max objective | [TBD] |
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### Best History (top 10 improvements)
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| Trial # | Mass (kg) | σ_max (MPa) | SF | Feasible |
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|---------|-----------|-------------|-----|----------|
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| [TBD] | [TBD] | [TBD] | [TBD] | [TBD] |
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| ... | ... | ... | ... | ... |
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---
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## Comparison vs Baseline
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| Metric | Baseline (solid) | Best isogrid | Reduction |
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|--------|-----------------|--------------|-----------|
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| Mass | [TBD] kg | [TBD] kg | [TBD] % |
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| Max σ | [TBD] MPa | [TBD] MPa | — |
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| SF | [TBD] | [TBD] | — |
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> Baseline solid plate mass: TBD (Gap G-02 — run `extract_part_mass_material` on unmodified model).
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---
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## Runtime Performance
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| Metric | Value |
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|--------|-------|
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| Total wall time | [TBD] h |
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| Average per trial | [TBD] s |
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| Brain (avg) | [TBD] s |
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| NX import (avg) | [TBD] s |
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| NX solve (avg) | [TBD] s |
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| Extraction (avg) | [TBD] s |
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| Fastest trial | [TBD] s |
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| Slowest trial | [TBD] s |
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---
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## Failure Analysis
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| Failure type | Count | Notes |
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|-------------|-------|-------|
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| Brain error | [TBD] | [TBD] |
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| NX import failed | [TBD] | [TBD] |
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| NX solve failed | [TBD] | [TBD] |
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| OP2 missing | [TBD] | [TBD] |
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| Extractor error | [TBD] | [TBD] |
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---
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## Recommendations
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> Fill in after campaign completes.
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- [ ] If feasibility rate < 80%: increase `s_min` lower bound (too many dense patterns stress-out)
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- [ ] If convergence flat after trial 100: consider Campaign 02 with tighter bounds around best region
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- [ ] If `gamma_stress` best value > 0.5: stress feedback is helping — keep it in next campaign
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- [ ] If best SF >> 5.0: more aggressive lightweighting possible — widen s_max bound
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---
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## Configuration Reference
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**Study name:** `isogrid_01_v1_tpe`
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**Constraint:** σ_max ≤ 100.6 MPa (stress only)
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**Material:** AL7075-T6, σ_yield = 503 MPa, SF = 5
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**DB:** `3_results/study.db`
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**Run script:** `run_optimization.py`
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**NX version:** DesigncenterNX2512
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**NX model:** `1_setup/model/ACS_Stack_Main_Plate_Iso_project_sim2.sim`
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