Table 2: Comparison of FEA and mathematical modal analysis results for selected modes for gasketed joint with and without raised face and nongasketed joint.

Frequency results Joint Mode 1 2 3 4 5 6 7 8 9 10 X1 X2 FEA Without raised face 120 147 228 262 312 343 391 422 446 454 759 5537 Mathematical 146 — — — 313 — — — — — 778 5536 Difference (%) 17.8 — — — 0.07 — — — — — 2.44 0.01 FEA With raised face 168 176 200 242 272 281 305 310 313 397 782 5536 Mathematical 146 — — — — — — — 313 — 778 5536 Difference (%) 13.1               0.00   0.07 0.00 FEA Nongasketed joint 348 399 483 522 614 671 774 994 1089 1114 2986 — Mathematical — — — 514 — — 734 — — — 2987 — Difference (%) — — — 1.53 — — 5.16 — — — 0.00 —