Research Article
Dynamic Behavior of Supported Structures from Free-Free Modal Tests Using Structural Dynamic Modification
Table 2
Experimental and numerical natural frequencies for the free-free configuration.
| | Mode | Mode shape | Natural frequency (Hz) | | Weak axis (Y) | Strong axis (X) | | Numerical | Experimental | Error (%) | Numerical | Experimental | Error (%) |
| | 1 | | | 0.5 | — | | 0.5 | — | | 2 | | | 0.6 | — | | 0.6 | — | | 3 | | 73.78 | 71.4 | 3.33 | 129.73 | 125.96 | 2.99 | | 4 | | 203.57 | 195.14 | 4.32 | 357.62 | 342.49 | 4.42 | | 5 | | 398.77 | 374.50 | 6.48 | 701.10 | 653.75 | 7.24 | | 6 | | 659.17 | 600.67 | 9.74 | 1159.09 | 1047.2 | 10.68 | | 7 | | 984.89 | 868.21 | 13.44 | 1731.83 | — | — |
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