Table 2.
The estimated natural frequencies and damping ratios of the pipe.
| Mode Number | Natural Frequency (Hz) | Damping Ratio (%) |
|---|---|---|
| 1 | 14.8 | 0.471 |
| 2 | 92.8 | 0.204 |
| 3 | 259.0 | 0.195 |
| 4 | 507.3 | 0.221 |
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