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     "solve_sec": 80.06,
     "cut_force_global_N": 16310.63,
     "cut_force_local_N": 22175.0,
     "cut_force_err_pct": 60.76,
     "iface_force": [
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       "local_N": 3350.5,
       "err_pct": 147.2
      },
      {
       "iface": "9-37",
       "global_N": 0.2,
       "local_N": 1.0,
       "err_pct": null
      },
      {
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       "global_N": 1720.9,
       "local_N": 53198.4,
       "err_pct": 3006.8
      },
      {
       "iface": "17-7",
       "global_N": 3384.8,
       "local_N": 1156837.9,
       "err_pct": 34234.4
      },
      {
       "iface": "17-19",
       "global_N": 4469.2,
       "local_N": 1861737.9,
       "err_pct": 41595.3
      },
      {
       "iface": "17-50",
       "global_N": 221.8,
       "local_N": 57528.9,
       "err_pct": 25977.5
      },
      {
       "iface": "17-52",
       "global_N": 716.8,
       "local_N": 57597.8,
       "err_pct": 7989.5
      },
      {
       "iface": "18-6",
       "global_N": 1118.1,
       "local_N": 293028.5,
       "err_pct": 26283.6
      },
      {
       "iface": "18-50",
       "global_N": 118.8,
       "local_N": 42870.7,
       "err_pct": 36103.4
      },
      {
       "iface": "22-6",
       "global_N": 1225.6,
       "local_N": 871.2,
       "err_pct": 49.2
      },
      {
       "iface": "22-52",
       "global_N": 680.7,
       "local_N": 323.1,
       "err_pct": 58.9
      },
      {
       "iface": "23-18",
       "global_N": 4680.2,
       "local_N": 284728.1,
       "err_pct": 6004.6
      },
      {
       "iface": "24-23",
       "global_N": 7995.8,
       "local_N": 2724.9,
       "err_pct": 108.7
      },
      {
       "iface": "34-17",
       "global_N": 1070.7,
       "local_N": 2959320.7,
       "err_pct": 276348.1
      },
      {
       "iface": "52-24",
       "global_N": 764.4,
       "local_N": 1865.6,
       "err_pct": 314.8
      },
      {
       "iface": "54-52",
       "global_N": 638.7,
       "local_N": 1346.6,
       "err_pct": 207.1
      }
     ],
     "iface_force_err_wpct": 20295.8,
     "iface_force_err_max_pct": 276348.1,
     "iface_force_n": 15,
     "iface_force_missing": 1
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   "fix_points_inside": 0,
   "cand_sel_r_mm": 34.3,
   "ladder_stop": "요소를 1.8배 가늘게 하는 것조차 절점 약 1,164,055개로 상한 950,000개를 넘습니다(후보 부재 77,768절점 / 둘레 347,678절점) - 여기서 멈춥니다",
   "verdict": "판정 불가",
   "why": "판정에 쓸 수 있는 단계가 1개뿐입니다 — 요소를 1.8배 가늘게 하는 것조차 절점 약 1,164,055개로 상한 950,000개를 넘습니다(후보 부재 77,768절점 / 둘레 347,678절점) - 여기서 멈춥니다"
  },
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    3819.94,
    363.37
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    -54306.92,
    -132170.94
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       "nodes": 29181
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      {
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       "h_mm": 13.5,
       "h_target_mm": 19.452,
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      {
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       "nodes": 29223
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      {
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      {
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      {
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       "h_mm": 13.7,
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      {
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     "elem_mm": 10.479,
     "welds_tied": 553,
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     "cand_nodes": 18887,
     "cand_parts_in_mesh": [
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     "parts_meshed": 12,
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     "compliance_Nmm": 344256.452,
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     "rf_by_iface_N": {
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      "2-7": [
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      "6-16": [
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      "7-8": [
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      "7-15": [
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      "7-17": [
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      "7-19": [
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      "7-26": [
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      "7-30": [
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      "7-31": [
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      "7-33": [
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      "7-34": [
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      "15-35": [
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      "25-35": [
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      "28-58": [
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      "28-63": [
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      "28-65": [
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      "28-66": [
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      "28-68": [
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      "57-87": [
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      "59-90": [
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      "60-62": [
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      "60-69": [
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      "60-90": [
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      "63-90": [
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      "64-90": [
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      "65-90": [
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      "66-90": [
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      "67-90": [
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      "68-90": [
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       67.11,
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      "69-93": [
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       -20952.2,
       -41743.1
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      "70-71": [
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      "71-86": [
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      "71-87": [
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      "71-93": [
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      "71-94": [
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      "71-98": [
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      "71-99": [
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      "71-105": [
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      "71-129": [
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      "90-92": [
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     "sec": 48.2,
     "solve_sec": 39.15,
     "cut_force_global_N": 144991.48,
     "cut_force_local_N": 160524.71,
     "cut_force_err_pct": 206.64,
     "iface_force": [
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       "iface": "1-7",
       "global_N": 358.9,
       "local_N": 257438.5,
       "err_pct": null
      },
      {
       "iface": "2-7",
       "global_N": 640.1,
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      {
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      {
       "iface": "15-7",
       "global_N": 3251.1,
       "local_N": 135803.3,
       "err_pct": 4185.4
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      {
       "iface": "16-6",
       "global_N": 1121.9,
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      {
       "iface": "17-7",
       "global_N": 3384.8,
       "local_N": 25054.6,
       "err_pct": 668.9
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      {
       "iface": "19-7",
       "global_N": 626.5,
       "local_N": 22990.0,
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      {
       "iface": "26-7",
       "global_N": 0.0,
       "local_N": 839425.3,
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      {
       "iface": "28-58",
       "global_N": 436.9,
       "local_N": 4263.9,
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      {
       "iface": "28-65",
       "global_N": 20233.3,
       "local_N": 12696.7,
       "err_pct": 39.1
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      {
       "iface": "30-7",
       "global_N": 171.9,
       "local_N": 2119.7,
       "err_pct": null
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      {
       "iface": "31-7",
       "global_N": 171.9,
       "local_N": 17395.0,
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      {
       "iface": "32-7",
       "global_N": 27.1,
       "local_N": 405741.3,
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      {
       "iface": "33-7",
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      {
       "iface": "34-7",
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       "local_N": 17843.0,
       "err_pct": 1087.4
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      {
       "iface": "35-15",
       "global_N": 137.3,
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      {
       "iface": "35-25",
       "global_N": 388.9,
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      {
       "iface": "35-36",
       "global_N": 283.4,
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      {
       "iface": "36-7",
       "global_N": 199.4,
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      },
      {
       "iface": "48-70",
       "global_N": 30777.8,
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      {
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      {
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      {
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       "err_pct": 277.4
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      {
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       "err_pct": 290.3
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      {
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       "local_N": 35838.6,
       "err_pct": 2541.0
      },
      {
       "iface": "60-90",
       "global_N": 1873.8,
       "local_N": 18640.2,
       "err_pct": 972.8
      },
      {
       "iface": "63-28",
       "global_N": 15987.0,
       "local_N": 17082.1,
       "err_pct": 201.1
      },
      {
       "iface": "63-90",
       "global_N": 14769.5,
       "local_N": 18126.3,
       "err_pct": 222.1
      },
      {
       "iface": "64-28",
       "global_N": 13060.1,
       "local_N": 20905.8,
       "err_pct": 253.2
      },
      {
       "iface": "64-90",
       "global_N": 12996.5,
       "local_N": 15489.9,
       "err_pct": 214.1
      },
      {
       "iface": "65-69",
       "global_N": 131146.7,
       "local_N": 412820.5,
       "err_pct": 412.9
      },
      {
       "iface": "66-28",
       "global_N": 20545.6,
       "local_N": 13949.9,
       "err_pct": 167.8
      },
      {
       "iface": "67-28",
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       "local_N": 15330.5,
       "err_pct": 168.4
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       "local_N": 21367.9,
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      },
      {
       "iface": "70-28",
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      },
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      },
      {
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      },
      {
       "iface": "90-92",
       "global_N": 0.0,
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      },
      {
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       "iface": "98-71",
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       "local_N": 11227.9,
       "err_pct": 727.2
      },
      {
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       "local_N": 1312.3,
       "err_pct": 156.1
      }
     ],
     "iface_force_err_wpct": 334.22,
     "iface_force_err_max_pct": 13212.4,
     "iface_force_n": 33,
     "iface_force_missing": 17
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     "n": 2,
     "h_target_mm": 7.11,
     "h_miss_parts": [],
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       "h_mm": 33.94,
       "h_target_mm": null,
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      {
       "no": 16,
       "h_mm": 14.81,
       "h_target_mm": null,
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       "nodes": 29181
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      {
       "no": 28,
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      {
       "no": 35,
       "h_mm": 8.76,
       "h_target_mm": null,
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       "nodes": 29223
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      {
       "no": 48,
       "h_mm": 13.5,
       "h_target_mm": null,
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       "nodes": 18435
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      {
       "no": 57,
       "h_mm": 15.83,
       "h_target_mm": null,
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       "nodes": 11162
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      {
       "no": 61,
       "h_mm": 71.98,
       "h_target_mm": null,
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       "nodes": 27
      },
      {
       "no": 62,
       "h_mm": 72.63,
       "h_target_mm": null,
       "h_hit": null,
       "nodes": 45
      },
      {
       "no": 69,
       "h_mm": 38.26,
       "h_target_mm": null,
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       "nodes": 1841
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      {
       "no": 71,
       "h_mm": 9.28,
       "h_target_mm": null,
       "h_hit": null,
       "nodes": 131883
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      {
       "no": 90,
       "h_mm": 13.7,
       "h_target_mm": null,
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       "nodes": 36363
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      {
       "no": 91,
       "h_mm": 20.85,
       "h_target_mm": null,
       "h_hit": null,
       "nodes": 1908
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     ],
     "nodes": 857734,
     "elems": 497327,
     "parts": 12,
     "elem_mm": 5.741,
     "welds_tied": 559,
     "seeds": 588,
     "disp_mm": 3.212021331676986,
     "struct_MPa": 1650.0270056896522,
     "cand_MPa": 1110.49,
     "cand_nodes": 288642,
     "cand_parts_in_mesh": [
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     ],
     "parts_meshed": 12,
     "cand_h_mm": [
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     "compliance_Nmm": 322527.315,
     "driven": 501,
     "interp_in_tet": 424,
     "interp_clamped": 77,
     "interp_nearest": 0,
     "rf_driven_N": [
      -39404.22,
      -2189.0,
      155772.84
     ],
     "rf_by_iface_N": {
      "1-7": [
       -3192.45,
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       247927.75
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      "2-7": [
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       -15056.97
      ],
      "6-16": [
       -245.02,
       -3508.89,
       1018.83
      ],
      "7-8": [
       -6215.43,
       -37138.65,
       4873.67
      ],
      "7-15": [
       -136975.24,
       -18401.66,
       564.57
      ],
      "7-17": [
       2263.5,
       24532.61,
       -4556.4
      ],
      "7-19": [
       1385.94,
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       -13620.04
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      "7-26": [
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      "7-30": [
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      "7-31": [
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      "7-32": [
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      "7-33": [
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      "7-34": [
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      "7-36": [
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      "15-35": [
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      "25-35": [
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      ],
      "28-58": [
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      "28-59": [
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       -11584.82
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      "28-60": [
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      ],
      "28-63": [
       -1888.12,
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       -15220.65
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      "28-64": [
       -2006.06,
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       -23318.02
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      "28-65": [
       648.59,
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      ],
      "28-66": [
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       -2162.41,
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      ],
      "28-67": [
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      "28-68": [
       -6529.67,
       2615.57,
       -7865.58
      ],
      "28-70": [
       9668.68,
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       -24712.58
      ],
      "35-36": [
       -48.29,
       452.63,
       687.96
      ],
      "48-58": [
       -31.74,
       -278.87,
       -322.58
      ],
      "48-70": [
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       -31524.68,
       -851.72
      ],
      "57-87": [
       6449.93,
       -21555.27,
       -3222.26
      ],
      "59-90": [
       13374.46,
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       13487.93
      ],
      "60-62": [
       4549.14,
       1643.94,
       6255.79
      ],
      "60-69": [
       -3645.68,
       -41162.07,
       -190728.6
      ],
      "60-90": [
       -1517.25,
       -10933.07,
       13316.88
      ],
      "63-90": [
       -6242.91,
       -914.65,
       17107.93
      ],
      "64-90": [
       -2974.09,
       -5808.19,
       14951.37
      ],
      "65-69": [
       -66949.27,
       123635.93,
       383225.35
      ],
      "65-90": [
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      "66-90": [
       890.76,
       545.0,
       1189.21
      ],
      "67-90": [
       -1621.58,
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       1644.9
      ],
      "68-90": [
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      ],
      "69-93": [
       -2958.19,
       -24703.4,
       -44691.2
      ],
      "70-71": [
       58.37,
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       -1259.95
      ],
      "71-86": [
       -408.79,
       4805.22,
       -936.55
      ],
      "71-87": [
       -9855.95,
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       670.16
      ],
      "71-93": [
       2609.08,
       -9617.69,
       -421.33
      ],
      "71-94": [
       560.72,
       -1637.9,
       -3822.77
      ],
      "71-98": [
       -4672.32,
       -9465.66,
       3529.45
      ],
      "71-99": [
       114.61,
       -2816.0,
       -922.19
      ],
      "71-105": [
       735.58,
       -829.48,
       750.18
      ],
      "71-129": [
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       -341.06
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      "90-92": [
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     },
     "sec": 207.7,
     "solve_sec": 185.94,
     "cut_force_global_N": 144991.48,
     "cut_force_local_N": 160694.31,
     "cut_force_err_pct": 206.59,
     "iface_force": [
      {
       "iface": "1-7",
       "global_N": 358.9,
       "local_N": 257446.3,
       "err_pct": null
      },
      {
       "iface": "2-7",
       "global_N": 640.1,
       "local_N": 47494.9,
       "err_pct": null
      },
      {
       "iface": "8-7",
       "global_N": 792.8,
       "local_N": 37969.2,
       "err_pct": null
      },
      {
       "iface": "15-7",
       "global_N": 3251.1,
       "local_N": 138206.9,
       "err_pct": 4262.5
      },
      {
       "iface": "16-6",
       "global_N": 1121.9,
       "local_N": 3662.0,
       "err_pct": null
      },
      {
       "iface": "17-7",
       "global_N": 3384.8,
       "local_N": 25054.6,
       "err_pct": 668.9
      },
      {
       "iface": "19-7",
       "global_N": 626.5,
       "local_N": 22990.0,
       "err_pct": null
      },
      {
       "iface": "26-7",
       "global_N": 0.0,
       "local_N": 839493.0,
       "err_pct": null
      },
      {
       "iface": "28-58",
       "global_N": 436.9,
       "local_N": 4760.0,
       "err_pct": null
      },
      {
       "iface": "28-65",
       "global_N": 20233.3,
       "local_N": 8310.8,
       "err_pct": 59.8
      },
      {
       "iface": "30-7",
       "global_N": 171.9,
       "local_N": 2119.5,
       "err_pct": null
      },
      {
       "iface": "31-7",
       "global_N": 171.9,
       "local_N": 17395.2,
       "err_pct": null
      },
      {
       "iface": "32-7",
       "global_N": 27.1,
       "local_N": 405736.3,
       "err_pct": null
      },
      {
       "iface": "33-7",
       "global_N": 27.1,
       "local_N": 737057.9,
       "err_pct": null
      },
      {
       "iface": "34-7",
       "global_N": 1526.5,
       "local_N": 17843.0,
       "err_pct": 1087.4
      },
      {
       "iface": "35-15",
       "global_N": 137.3,
       "local_N": 9588.1,
       "err_pct": null
      },
      {
       "iface": "35-25",
       "global_N": 388.9,
       "local_N": 1069.9,
       "err_pct": null
      },
      {
       "iface": "35-36",
       "global_N": 283.4,
       "local_N": 824.9,
       "err_pct": null
      },
      {
       "iface": "36-7",
       "global_N": 199.4,
       "local_N": 16235.5,
       "err_pct": null
      },
      {
       "iface": "48-70",
       "global_N": 30777.8,
       "local_N": 32388.9,
       "err_pct": 10.4
      },
      {
       "iface": "57-87",
       "global_N": 14063.1,
       "local_N": 22729.1,
       "err_pct": 80.1
      },
      {
       "iface": "59-28",
       "global_N": 5006.5,
       "local_N": 11774.2,
       "err_pct": 239.1
      },
      {
       "iface": "59-90",
       "global_N": 5599.9,
       "local_N": 19155.4,
       "err_pct": 283.4
      },
      {
       "iface": "60-28",
       "global_N": 4535.8,
       "local_N": 5459.7,
       "err_pct": 165.4
      },
      {
       "iface": "60-62",
       "global_N": 1465.5,
       "local_N": 7907.7,
       "err_pct": 562.0
      },
      {
       "iface": "60-90",
       "global_N": 1873.8,
       "local_N": 17296.6,
       "err_pct": 891.2
      },
      {
       "iface": "63-28",
       "global_N": 15987.0,
       "local_N": 15357.0,
       "err_pct": 192.0
      },
      {
       "iface": "63-90",
       "global_N": 14769.5,
       "local_N": 18234.4,
       "err_pct": 222.8
      },
      {
       "iface": "64-28",
       "global_N": 13060.1,
       "local_N": 23889.6,
       "err_pct": 280.6
      },
      {
       "iface": "64-90",
       "global_N": 12996.5,
       "local_N": 16313.3,
       "err_pct": 219.9
      },
      {
       "iface": "65-69",
       "global_N": 131146.7,
       "local_N": 408203.0,
       "err_pct": 409.2
      },
      {
       "iface": "66-28",
       "global_N": 20545.6,
       "local_N": 8822.7,
       "err_pct": 142.5
      },
      {
       "iface": "67-28",
       "global_N": 22314.6,
       "local_N": 6945.9,
       "err_pct": 130.7
      },
      {
       "iface": "68-28",
       "global_N": 12942.7,
       "local_N": 10552.0,
       "err_pct": 163.8
      },
      {
       "iface": "68-90",
       "global_N": 12889.1,
       "local_N": 12644.8,
       "err_pct": 192.5
      },
      {
       "iface": "69-60",
       "global_N": 1444.0,
       "local_N": 195153.8,
       "err_pct": 13519.9
      },
      {
       "iface": "70-28",
       "global_N": 18977.3,
       "local_N": 28060.8,
       "err_pct": 245.5
      },
      {
       "iface": "70-71",
       "global_N": 15929.4,
       "local_N": 8187.1,
       "err_pct": 151.4
      },
      {
       "iface": "71-86",
       "global_N": 6215.0,
       "local_N": 4912.7,
       "err_pct": 27.9
      },
      {
       "iface": "71-87",
       "global_N": 18831.5,
       "local_N": 16153.7,
       "err_pct": 15.7
      },
      {
       "iface": "71-94",
       "global_N": 4787.9,
       "local_N": 4196.5,
       "err_pct": 13.1
      },
      {
       "iface": "71-99",
       "global_N": 4332.8,
       "local_N": 2965.4,
       "err_pct": 43.0
      },
      {
       "iface": "71-129",
       "global_N": 4295.0,
       "local_N": 2529.0,
       "err_pct": 43.2
      },
      {
       "iface": "90-65",
       "global_N": 1306.3,
       "local_N": 3426.6,
       "err_pct": null
      },
      {
       "iface": "90-66",
       "global_N": 6162.6,
       "local_N": 1582.6,
       "err_pct": 123.0
      },
      {
       "iface": "90-92",
       "global_N": 0.0,
       "local_N": 10383.6,
       "err_pct": null
      },
      {
       "iface": "93-69",
       "global_N": 6374.1,
       "local_N": 51149.9,
       "err_pct": 814.2
      },
      {
       "iface": "93-71",
       "global_N": 4749.8,
       "local_N": 9974.2,
       "err_pct": 298.8
      },
      {
       "iface": "98-71",
       "global_N": 1773.8,
       "local_N": 11130.4,
       "err_pct": 721.2
      },
      {
       "iface": "105-71",
       "global_N": 1879.2,
       "local_N": 1338.6,
       "err_pct": 157.5
      }
     ],
     "iface_force_err_wpct": 315.0,
     "iface_force_err_max_pct": 13519.9,
     "iface_force_n": 33,
     "iface_force_missing": 17
    }
   ],
   "fix_points_inside": 6,
   "cand_sel_r_mm": 295.6,
   "ladder_stop": "요소를 1.8배 가늘게 하는 것조차 절점 약 6,397,627개로 상한 950,000개를 넘습니다(후보 부재 583,294절점 / 둘레 274,440절점) - 여기서 멈춥니다",
   "h_ratio": 2.49,
   "h_pair_mm": [
    13.5,
    5.43
   ],
   "stages_done": 2,
   "conv": {
    "disp_pct_ref_only": 0.0,
    "disp_note": "경계 강제값 — 판정에 쓰지 않음",
    "cand_MPa_pct": 99.76,
    "compliance_pct": 6.31,
    "worst_pct": 99.76
   },
   "verdict": "특이점 확정",
   "why": "요소를 13.5mm → 5.4mm (2.49배) 로 줄였는데 이 자리 응력이 99.8% 더 커졌습니다 - 값이 발산하는 특이점입니다(실제 위험이 아님)"
  },
  {
   "cand": 3,
   "at": [
    5509.17,
    3817.81,
    23.48
   ],
   "kind": "특이점 의심",
   "parts_n": 12,
   "R_mm": 148.7,
   "drive_pts": 337,
   "cand_to_drive_mm": 164.7,
   "load_points_inside": 0,
   "cut_ifaces": 27,
   "merged_n": 0,
   "merged": [],
   "merge_tol_mm": 29.2,
   "global_cut_N": [
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       "no": 71,
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     "compliance_Nmm": 55832.455,
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      "61-90": [
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      "63-90": [
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      "64-90": [
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      "68-90": [
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      "71-86": [
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      "71-87": [
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      "71-94": [
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      "71-99": [
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      "71-129": [
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      "90-92": [
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     },
     "sec": 39.5,
     "solve_sec": 31.84,
     "cut_force_global_N": 57094.79,
     "cut_force_local_N": 147307.22,
     "cut_force_err_pct": 215.6,
     "iface_force": [
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       "iface": "28-7",
       "global_N": 2144.6,
       "local_N": 6092.4,
       "err_pct": 211.4
      },
      {
       "iface": "28-16",
       "global_N": 6474.6,
       "local_N": 17331.8,
       "err_pct": 365.7
      },
      {
       "iface": "28-58",
       "global_N": 436.9,
       "local_N": 5468.4,
       "err_pct": 1338.5
      },
      {
       "iface": "28-61",
       "global_N": 32423.2,
       "local_N": 45973.0,
       "err_pct": 43.5
      },
      {
       "iface": "48-28",
       "global_N": 31863.4,
       "local_N": 38651.2,
       "err_pct": 215.6
      },
      {
       "iface": "48-62",
       "global_N": 8516.0,
       "local_N": 3486.3,
       "err_pct": 61.3
      },
      {
       "iface": "57-28",
       "global_N": 6181.2,
       "local_N": 42040.9,
       "err_pct": 776.9
      },
      {
       "iface": "59-28",
       "global_N": 5006.5,
       "local_N": 15827.1,
       "err_pct": 332.6
      },
      {
       "iface": "59-90",
       "global_N": 5599.9,
       "local_N": 8686.6,
       "err_pct": 190.4
      },
      {
       "iface": "61-91",
       "global_N": 24548.9,
       "local_N": 10039.5,
       "err_pct": 133.2
      },
      {
       "iface": "63-28",
       "global_N": 15987.0,
       "local_N": 13756.4,
       "err_pct": 185.1
      },
      {
       "iface": "63-90",
       "global_N": 14769.5,
       "local_N": 16415.6,
       "err_pct": 210.8
      },
      {
       "iface": "64-28",
       "global_N": 13060.1,
       "local_N": 10492.3,
       "err_pct": 177.4
      },
      {
       "iface": "64-90",
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       "local_N": 10183.6,
       "err_pct": 178.1
      },
      {
       "iface": "68-28",
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       "local_N": 14927.6,
       "err_pct": 213.7
      },
      {
       "iface": "68-90",
       "global_N": 12889.1,
       "local_N": 10677.8,
       "err_pct": 182.0
      },
      {
       "iface": "70-28",
       "global_N": 18977.3,
       "local_N": 34886.0,
       "err_pct": 277.8
      },
      {
       "iface": "70-71",
       "global_N": 15929.4,
       "local_N": 8916.5,
       "err_pct": 154.9
      },
      {
       "iface": "71-16",
       "global_N": 7832.3,
       "local_N": 6877.1,
       "err_pct": 36.8
      },
      {
       "iface": "71-86",
       "global_N": 6215.0,
       "local_N": 6636.1,
       "err_pct": 24.6
      },
      {
       "iface": "71-87",
       "global_N": 18831.5,
       "local_N": 22271.5,
       "err_pct": 26.7
      },
      {
       "iface": "71-94",
       "global_N": 4787.9,
       "local_N": 3644.4,
       "err_pct": 28.9
      },
      {
       "iface": "71-99",
       "global_N": 4332.8,
       "local_N": 3255.8,
       "err_pct": 39.3
      },
      {
       "iface": "71-129",
       "global_N": 4295.0,
       "local_N": 2820.7,
       "err_pct": 40.8
      },
      {
       "iface": "90-61",
       "global_N": 9864.9,
       "local_N": 5525.9,
       "err_pct": 81.8
      },
      {
       "iface": "90-92",
       "global_N": 0.0,
       "local_N": 5087.7,
       "err_pct": null
      },
      {
       "iface": "105-71",
       "global_N": 1879.2,
       "local_N": 999.7,
       "err_pct": 136.2
      }
     ],
     "iface_force_err_wpct": 164.19,
     "iface_force_err_max_pct": 1338.5,
     "iface_force_n": 26,
     "iface_force_missing": 1
    },
    {
     "n": 2,
     "h_target_mm": 6.75,
     "h_miss_parts": [],
     "per_part_h": [
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       "no": 28,
       "h_mm": 5.18,
       "h_target_mm": 6.75,
       "h_hit": true,
       "nodes": 665758
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      {
       "no": 60,
       "h_mm": 11.0,
       "h_target_mm": null,
       "h_hit": null,
       "nodes": 3404
      },
      {
       "no": 62,
       "h_mm": 11.05,
       "h_target_mm": null,
       "h_hit": null,
       "nodes": 7136
      },
      {
       "no": 65,
       "h_mm": 43.2,
       "h_target_mm": null,
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       "nodes": 27
      },
      {
       "no": 66,
       "h_mm": 43.2,
       "h_target_mm": null,
       "h_hit": null,
       "nodes": 27
      },
      {
       "no": 67,
       "h_mm": 37.29,
       "h_target_mm": null,
       "h_hit": null,
       "nodes": 27
      },
      {
       "no": 69,
       "h_mm": 38.26,
       "h_target_mm": null,
       "h_hit": null,
       "nodes": 1841
      },
      {
       "no": 71,
       "h_mm": 9.2,
       "h_target_mm": null,
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       "nodes": 134943
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      {
       "no": 90,
       "h_mm": 12.24,
       "h_target_mm": null,
       "h_hit": null,
       "nodes": 50595
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      {
       "no": 91,
       "h_mm": 11.36,
       "h_target_mm": null,
       "h_hit": null,
       "nodes": 8321
      },
      {
       "no": 93,
       "h_mm": 23.16,
       "h_target_mm": null,
       "h_hit": null,
       "nodes": 274
      },
      {
       "no": 98,
       "h_mm": 11.38,
       "h_target_mm": null,
       "h_hit": null,
       "nodes": 1366
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     ],
     "nodes": 873719,
     "elems": 517997,
     "parts": 12,
     "elem_mm": 5.341,
     "welds_tied": 400,
     "seeds": 425,
     "disp_mm": 3.212021331676986,
     "struct_MPa": 1640.9523716068056,
     "cand_MPa": 482.8,
     "cand_nodes": 15969,
     "cand_parts_in_mesh": [
      28
     ],
     "parts_meshed": 12,
     "cand_h_mm": [
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     ],
     "compliance_Nmm": 51338.977,
     "driven": 337,
     "interp_in_tet": 330,
     "interp_clamped": 7,
     "interp_nearest": 0,
     "rf_driven_N": [
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      -7509.86,
      -116249.95
     ],
     "rf_by_iface_N": {
      "7-28": [
       2152.54,
       334.83,
       -11572.25
      ],
      "16-28": [
       4660.79,
       -266.11,
       -16816.6
      ],
      "16-71": [
       4368.58,
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       -2642.69
      ],
      "28-48": [
       4650.62,
       -22002.41,
       -11167.23
      ],
      "28-57": [
       -1660.56,
       -1428.83,
       -22756.95
      ],
      "28-58": [
       -4623.11,
       -3012.4,
       -5662.24
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      "28-59": [
       1646.24,
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       -8130.37
      ],
      "28-61": [
       1174.16,
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      ],
      "28-63": [
       3340.59,
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      "28-64": [
       -1069.59,
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      ],
      "28-68": [
       -6217.94,
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      ],
      "28-70": [
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      "48-62": [
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      "59-90": [
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      "61-69": [
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      ],
      "61-90": [
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      "61-91": [
       -3053.82,
       -8523.55,
       4430.79
      ],
      "63-90": [
       -5090.25,
       -462.31,
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      ],
      "64-90": [
       2024.96,
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      ],
      "68-90": [
       10496.02,
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      ],
      "70-71": [
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       -3221.3
      ],
      "71-86": [
       -495.81,
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      ],
      "71-87": [
       -10637.87,
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      ],
      "71-94": [
       -76.25,
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       -3440.33
      ],
      "71-99": [
       -52.4,
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       -1007.43
      ],
      "71-105": [
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      "71-129": [
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       -373.89
      ],
      "90-92": [
       214.92,
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     },
     "sec": 246.7,
     "solve_sec": 223.17,
     "cut_force_global_N": 57094.79,
     "cut_force_local_N": 116652.39,
     "cut_force_err_pct": 179.39,
     "iface_force": [
      {
       "iface": "28-7",
       "global_N": 2144.6,
       "local_N": 11775.5,
       "err_pct": 454.7
      },
      {
       "iface": "28-16",
       "global_N": 6474.6,
       "local_N": 17452.6,
       "err_pct": 367.7
      },
      {
       "iface": "28-58",
       "global_N": 436.9,
       "local_N": 7906.2,
       "err_pct": 1881.6
      },
      {
       "iface": "28-61",
       "global_N": 32423.2,
       "local_N": 30576.3,
       "err_pct": 7.4
      },
      {
       "iface": "48-28",
       "global_N": 31863.4,
       "local_N": 25108.6,
       "err_pct": 173.8
      },
      {
       "iface": "48-62",
       "global_N": 8516.0,
       "local_N": 837.4,
       "err_pct": 103.3
      },
      {
       "iface": "57-28",
       "global_N": 6181.2,
       "local_N": 22862.1,
       "err_pct": 468.9
      },
      {
       "iface": "59-28",
       "global_N": 5006.5,
       "local_N": 9274.1,
       "err_pct": 216.0
      },
      {
       "iface": "59-90",
       "global_N": 5599.9,
       "local_N": 8328.3,
       "err_pct": 183.0
      },
      {
       "iface": "61-91",
       "global_N": 24548.9,
       "local_N": 10080.1,
       "err_pct": 130.4
      },
      {
       "iface": "63-28",
       "global_N": 15987.0,
       "local_N": 10370.0,
       "err_pct": 164.8
      },
      {
       "iface": "63-90",
       "global_N": 14769.5,
       "local_N": 16299.7,
       "err_pct": 210.0
      },
      {
       "iface": "64-28",
       "global_N": 13060.1,
       "local_N": 11199.6,
       "err_pct": 184.2
      },
      {
       "iface": "64-90",
       "global_N": 12996.5,
       "local_N": 9960.9,
       "err_pct": 176.5
      },
      {
       "iface": "68-28",
       "global_N": 12942.7,
       "local_N": 7181.9,
       "err_pct": 150.8
      },
      {
       "iface": "68-90",
       "global_N": 12889.1,
       "local_N": 10661.3,
       "err_pct": 182.0
      },
      {
       "iface": "70-28",
       "global_N": 18977.3,
       "local_N": 26383.4,
       "err_pct": 234.2
      },
      {
       "iface": "70-71",
       "global_N": 15929.4,
       "local_N": 9776.6,
       "err_pct": 160.4
      },
      {
       "iface": "71-16",
       "global_N": 7832.3,
       "local_N": 7040.1,
       "err_pct": 39.5
      },
      {
       "iface": "71-86",
       "global_N": 6215.0,
       "local_N": 6377.0,
       "err_pct": 23.2
      },
      {
       "iface": "71-87",
       "global_N": 18831.5,
       "local_N": 21167.4,
       "err_pct": 21.7
      },
      {
       "iface": "71-94",
       "global_N": 4787.9,
       "local_N": 3647.0,
       "err_pct": 28.8
      },
      {
       "iface": "71-99",
       "global_N": 4332.8,
       "local_N": 3272.6,
       "err_pct": 39.0
      },
      {
       "iface": "71-129",
       "global_N": 4295.0,
       "local_N": 2815.4,
       "err_pct": 40.9
      },
      {
       "iface": "90-61",
       "global_N": 9864.9,
       "local_N": 5096.1,
       "err_pct": 72.8
      },
      {
       "iface": "90-92",
       "global_N": 0.0,
       "local_N": 5275.2,
       "err_pct": null
      },
      {
       "iface": "105-71",
       "global_N": 1879.2,
       "local_N": 1030.3,
       "err_pct": 139.0
      }
     ],
     "iface_force_err_wpct": 144.24,
     "iface_force_err_max_pct": 1881.6,
     "iface_force_n": 26,
     "iface_force_missing": 1
    }
   ],
   "fix_points_inside": 6,
   "cand_sel_r_mm": 88.8,
   "ladder_stop": "요소를 1.8배 가늘게 하는 것조차 절점 약 7,196,822개로 상한 950,000개를 넘습니다(후보 부재 665,758절점 / 둘레 207,961절점) - 여기서 멈춥니다",
   "h_ratio": 2.61,
   "h_pair_mm": [
    13.5,
    5.18
   ],
   "stages_done": 2,
   "conv": {
    "disp_pct_ref_only": 0.0,
    "disp_note": "경계 강제값 — 판정에 쓰지 않음",
    "cand_MPa_pct": 333.47,
    "compliance_pct": 8.05,
    "worst_pct": 333.47
   },
   "verdict": "특이점 확정",
   "why": "요소를 13.5mm → 5.2mm (2.61배) 로 줄였는데 이 자리 응력이 333.5% 더 커졌습니다 - 값이 발산하는 특이점입니다(실제 위험이 아님)"
  }
 ]
}