Research Article
Nonlinear Analysis of Cable Vibration of a Multispan Cable-Stayed Bridge under Transverse Excitation
Table 1
Comparison of natural frequencies for the first ten global modes.
| Mode order | OESC (Hz) | MESC (Hz) | Structural component | Description (MESC) |
| 1 | 0.2725 | 0.2756 | Deck | Antisymmetric vertical bending | 2 | 0.2939 | 0.2925 | Main Tower | Lateral bending | 3 | 0.2961 | 0.2947 | Main Tower | Longitudinal bending | 4 | 0.4429 | 0.4470 | Deck | Torsional bending | 5 | 0.5424 | 0.5600 | Deck | Symmetric vertical bending | 6 (41) | 0.6592 | 0.6686 | Deck | Antisymmetric vertical bending | 7 (42) | 0.6737 | 0.6714 | Minor tower 1, 2 | Lateral + longitudinal bending | 8 (56) | 0.6748 | 0.6728 | Minor tower 1, 2 | Longitudinal bending | 9 (57) | 0.6996 | 0.6972 | Minor tower 1, 2 | Lateral bending | 10 (69) | 0.6996 | 0.6972 | Minor tower 1, 2 | Longitudinal + lateral bending |
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Note. The numbers in brackets are the mode order of the MESC model.
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