Table 4 Natural frequency of healthy and defected plate.
Defect type | Defect positions | First natural frequency (Hz) | Second natural frequency (Hz) | Third natural frequency (Hz) | Fourth natural frequency (Hz) | Fifth natural frequency (Hz) |
|---|---|---|---|---|---|---|
Healthy | - | 53.894 | 198.24 | 279.92 | 664.19 | 730.21 |
Delamination | 01-01-00 | 54.781 | 188.86 | 295.03 | 715.63 | 725.92 |
Delamination | 15-01-00 | 56.795 | 193.38 | 290.01 | 709.86 | 733.01 |
Delamination | 24-01-00 | 57.553 | 195.13 | 299.7 | 735.63 | 745.66 |
Delamination | 01-04-00 | 52.238 | 191.37 | 266.09 | 671.92 | 704.26 |
Delamination | 15-04-00 | 53.234 | 197.07 | 278.07 | 665.69 | 730.34 |
Delamination | 24-04-00 | 53.703 | 198.82 | 276.13 | 732.13 | 748.26 |
Delamination | 01-07-00 | 53.783 | 188.01 | 296.94 | 665.65 | 807.2 |
Delamination | 15-07-00 | 57.327 | 197.12 | 300.46 | 718.45 | 828.65 |
Delamination | 24-07-00 | 57.988 | 198.89 | 308.07 | 745.42 | 837.51 |
Crack | 00-00-04 | 67.974 | 246.58 | 393.21 | 824.6 | 1084.5 |
Crack | 00-00-11 | 71.914 | 265.14 | 390.27 | 827.86 | 1035.8 |
Crack | 00-00-19 | 73.787 | 263.33 | 361.99 | 808.66 | 1000.7 |
Crack | 00-00-26 | 74.663 | 281.96 | 395.31 | 832.48 | 1043.86 |
Delamination and Crack | 22-01-07 | 66.764 | 179.48 | 392.38 | 719.52 | 753.3 |
Delamination and Crack | 03-01-28 | 69.336 | 276.41 | 391.46 | 713.13 | 809.31 |
Delamination and Crack | 22-04-07 | 67.105 | 180.66 | 395.8 | 758.89 | 1003.2 |
Delamination and Crack | 03-04-28 | 75.711 | 284.83 | 387.22 | 743.1 | 1005.4 |
Delamination and Crack | 22-07-07 | 68.963 | 180.64 | 415.59 | 773.52 | 1044.9 |
Delamination and Crack | 03-07-28 | 70.922 | 280.7 | 407.71 | 770.41 | 1082.1 |
