Table 5 Effect of crack length on natural frequencies.
Crack length (mm) | Defect positions | First natural frequency (Hz) | Second natural frequency (Hz) | Third natural frequency (Hz) | Fourth natural frequency (Hz) | Fifth natural frequency (Hz) |
|---|---|---|---|---|---|---|
3 | 22-04-07 | 67.105 | 180.66 | 395.8 | 758.89 | 1003.2 |
1.5 | 22-04-07 | 73.498 | 264.04 | 397.97 | 813.93 | 1053.02 |
0.5 | 22-04-07 | 75.612 | 290.61 | 398.41 | 826.67 | 1069.6 |
3 | 00-00-19 | 73.787 | 263.33 | 361.99 | 808.66 | 1000.7 |
1.5 | 00-00-19 | 75.396 | 289.93 | 394.91 | 838.19 | 1082.6 |
0.5 | 00-00-19 | 75.629 | 292.64 | 403.78 | 842.55 | 1100.1 |
