Study Report — 01_v1_tpe: Isogrid Mass Minimization

Study: isogrid_01_v1_tpe Project: Isogrid Dev Plate (ACS Stack Main Plate) Algorithm: Optuna TPE, seed=42 Budget: 200 trials Date started: [TBD] Date completed: [TBD] Author: Antoine + Atomizer

Executive Summary

Metric	Value
Status	[TBD — Not started / Running / Complete]
Trials completed	[TBD] / 200
Best mass	[TBD] kg
Best trial #	[TBD]
Convergence trial	[TBD] (when best was first found)
Best σ_max	[TBD] MPa
Best SF	[TBD] (target ≥ 5.0)
Feasibility rate	[TBD] %
Total runtime	[TBD] h
Avg time/trial	[TBD] s

Best Design Found

Parameters

Variable	Value	Range
`eta_0`	[TBD]	[0.0, 0.4]
`alpha`	[TBD]	[0.3, 2.0]
`beta`	[TBD]	[0.0, 1.0]
`gamma_stress`	[TBD]	[0.0, 1.5]
`R_0`	[TBD] mm	[10, 100]
`R_edge`	[TBD] mm	[5, 40]
`s_min`	[TBD] mm	[8, 20]
`s_max`	[TBD] mm	[25, 60]

Results

Metric	Value
Mass	[TBD] kg ([TBD] g)
Max von Mises	[TBD] MPa
Safety factor	[TBD]
Feasible	[TBD]
Total pockets	[TBD] (sandbox_1 + sandbox_2)

Trial folder

2_iterations/trial_[TBD]/
├── params.json
├── results.json
├── rib_profile_sandbox_1.json
└── rib_profile_sandbox_2.json

Optimization Progress

Trial Statistics

Metric	Value
Total trials	[TBD]
Feasible trials	[TBD] ([TBD] %)
Failed trials (error)	[TBD]
Min objective	[TBD]
Median objective	[TBD]
Max objective	[TBD]

Best History (top 10 improvements)

Trial #	Mass (kg)	σ_max (MPa)	SF	Feasible
[TBD]	[TBD]	[TBD]	[TBD]	[TBD]
...	...	...	...	...

Comparison vs Baseline

Metric	Baseline (solid)	Best isogrid	Reduction
Mass	[TBD] kg	[TBD] kg	[TBD] %
Max σ	[TBD] MPa	[TBD] MPa	—
SF	[TBD]	[TBD]	—

Baseline solid plate mass: TBD (Gap G-02 — run extract_part_mass_material on unmodified model).

Runtime Performance

Metric	Value
Total wall time	[TBD] h
Average per trial	[TBD] s
Brain (avg)	[TBD] s
NX import (avg)	[TBD] s
NX solve (avg)	[TBD] s
Extraction (avg)	[TBD] s
Fastest trial	[TBD] s
Slowest trial	[TBD] s

Failure Analysis

Failure type	Count	Notes
Brain error	[TBD]	[TBD]
NX import failed	[TBD]	[TBD]
NX solve failed	[TBD]	[TBD]
OP2 missing	[TBD]	[TBD]
Extractor error	[TBD]	[TBD]

Recommendations

Fill in after campaign completes.

If feasibility rate < 80%: increase s_min lower bound (too many dense patterns stress-out)
If convergence flat after trial 100: consider Campaign 02 with tighter bounds around best region
If gamma_stress best value > 0.5: stress feedback is helping — keep it in next campaign
If best SF >> 5.0: more aggressive lightweighting possible — widen s_max bound

Configuration Reference

Study name: isogrid_01_v1_tpe Constraint: σ_max ≤ 100.6 MPa (stress only) Material: AL7075-T6, σ_yield = 503 MPa, SF = 5 DB: 3_results/study.db Run script: run_optimization.py NX version: DesigncenterNX2512 NX model: 1_setup/model/ACS_Stack_Main_Plate_Iso_project_sim2.sim

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