Table 4 Results of pipeline modal parameter identification.
From: Study on the vibration characteristics and influence range of buried dam pipeline
Modal order | ERA modal parameter identification (Hz) | Coupled model calculation (Hz) | Error |
|---|---|---|---|
1 | 1.477 | 1.499 | 0.015 |
2 | 3.955 | 4.039 | 0.021 |
3 | 7.953 | 8.323 | 0.046 |
4 | 13.553 | 14.242 | 0.048 |
5 | 17.563 | 16.706 | 0.049 |
