Mechanism of the vortex-induced vibration control for twin-box girders with central baffle plates

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (6) : 189-195.

TAN Zhongxu1,2,GUO Guohe3,4,ZHU Ledong1,2,ZHU Qing1,2,QUAN Honglie5

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Abstract

This study investigates the vortex-induced vibration (VIV) performance of twin-box girders and the mechanism of vortex-induced vibration control by central baffle plates through wind tunnel tests and computational fluid dynamics (CFD). The effectiveness of different types (horizontal, one vertical, and two vertical plates) and sizes of central baffle plates is compared, and the corresponding VIV control mechanisms are discussed based on the streamlines and vorticity magnitude contours. The results demonstrate that horizontal plates impede airflow, reduce wind velocity near the section, increase vortex shedding difficulty, and thus control VIV. Control effectiveness increases with plate width. Meanwhile, vertical plates stabilize vortices in small areas, prevent vortex shedding, and effectively control VIV. The control effect of two half-height vertical plates is superior to that of one full-height vertical plate, with optimization of the distance between the plates required.

Key words

twin-box girder / vortex-induced vibration / central baffle plate / wind tunnel test / computational fluid dynamics

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TAN Zhongxu1,2,GUO Guohe3,4,ZHU Ledong1,2,ZHU Qing1,2,QUAN Honglie5. Mechanism of the vortex-induced vibration control for twin-box girders with central baffle plates[J]. Journal of Vibration and Shock, 2024, 43(6): 189-195

References

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