Research Article
Modal Parameter Identification from Output Data Only: Equivalent Approaches
Table 1
Natural eigenfrequencies and damping factors of the experimental beam.
| Modes | Theoretical eigenfrequencies (Hz) | Identified eigenfrequencies (Hz) | Relative error on eigenfrequencies (%) | Identified damping factor (%) |
| 1 | 24.13 | 24.17 | 0.16 | 1.06 | 2 | 150.81 | 150.58 | −0.15 | 0.13 | 3 | 422.29 | 419.72 | −0.61 | 0.04 |
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