Table 7: Modal identification of Wuyuan Bridge by EFDD.

 ModeWirelessTethered Frequency difference (%) Damping difference (%)Descriptions of mode shape
(Hz) (%) (Hz) (%)

10.7742.140.7801.990.777.51st vertical bending (antisymmetric)
21.2101.031.2110.890.0815.71st lateral bending (symmetric)
31.2550.791.2581.050.2424.82nd vertical bending (symmetric)
41.6310.271.6380.870.4369.01st torsion (anti-symmetric)
51.7050.571.6990.990.3542.43rd vertical bending (symmetric)
61.8970.621.8871.290.5351.92nd torsion (symmetric)
72.4400.542.4430.690.1221.73rd torsion (symmetric)
82.7000.742.7300.651.1013.84th vertical bending (anti-symmetric)
93.2960.283.3170.760.6363.25th vertical bending (symmetric)