{
  "study_name": "bracket_stiffness_optimization_V2",
  "description": "Maximize bracket stiffness while minimizing mass (constraint: mass ≤ 0.2 kg)",

  "objectives": [
    {
      "name": "stiffness",
      "type": "maximize",
      "description": "Structural stiffness (N/mm) calculated as Force/Displacement",
      "target": null,
      "weight": 1.0
    },
    {
      "name": "mass",
      "type": "minimize",
      "description": "Total mass (kg) - secondary objective with hard constraint",
      "target": null,
      "weight": 0.1
    }
  ],

  "constraints": [
    {
      "name": "mass_limit",
      "type": "less_than",
      "value": 0.2,
      "description": "Maximum allowable mass: 200 grams"
    }
  ],

  "design_variables": [
    {
      "name": "support_angle",
      "type": "continuous",
      "min": 20.0,
      "max": 70.0,
      "initial": 60.0,
      "unit": "degrees",
      "description": "Angle of support arm relative to base"
    },
    {
      "name": "tip_thickness",
      "type": "continuous",
      "min": 30.0,
      "max": 60.0,
      "initial": 30.0,
      "unit": "mm",
      "description": "Thickness of bracket tip where load is applied"
    }
  ],

  "optimization_settings": {
    "algorithm": "NSGA-II",
    "n_trials": 50,
    "n_jobs": 1,
    "sampler": "TPESampler",
    "pruner": "MedianPruner",
    "pruner_settings": {
      "n_startup_trials": 10,
      "n_warmup_steps": 5,
      "interval_steps": 1
    },
    "timeout": null,
    "seed": 42
  },

  "simulation_settings": {
    "solver": "NX_Nastran",
    "solution_type": "SOL101",
    "analysis_type": "Linear_Static",
    "model_file": "1_setup/model/Bracket.prt",
    "sim_file": "1_setup/model/Bracket_sim1.sim",
    "fem_file": "1_setup/model/Bracket_fem1.fem"
  },

  "extraction_settings": {
    "extractor_module": "bracket_stiffness_extractor",
    "extractor_class": "BracketStiffnessExtractor",
    "field_file": "export_field_dz.fld",
    "op2_file": "Bracket_sim1.op2",
    "force_component": "fz",
    "displacement_component": "z",
    "displacement_aggregation": "max_abs"
  },

  "output_settings": {
    "results_dir": "2_results",
    "database_name": "study.db",
    "checkpoint_interval": 5,
    "visualization": true,
    "export_format": ["json", "csv", "parquet"]
  },

  "dashboard_settings": {
    "enabled": true,
    "port": 8000,
    "realtime_updates": true,
    "websocket": true
  }
}