| Autor: |
Lang Tianyi, Wang Hao, Jia Huaizhe, Liu Zhenqing, Xu Zidong, Gao Hui |
| Zdroj: |
Journal of Southeast University / Dongnan Daxue Xuebao; Sep2022, Vol. 52 Issue 5, p833-840, 8p |
| Abstrakt: |
To investigate the influence of bridge deck temporary facilities on the vortex-induced vibration (VIV) of the main girder, the VIV of a certain long-span suspension bridge was simulated using computational fluid dynamics. The variation of the flow field was studied. The spatial and temporal distribution characteristics of the surface pressure of the main girder under vortex-induced conditions were analyzed using the proper orthogonal decomposition method (POD). The results show that temporary facilities lead to a large vortex in the flow field on the top of the main girder, but the vortex shape is stable without VIV. In the case of vortex-induced vibration of the main girder, separation, reattachment, and shedding in a period of vibration occur in succession at the top vortex. The vibration of the main girder is driven by the evolution of the vortex. The dominant VIV mode exists in the model, and its dominant frequency is in agreement with the natural frequency of the structure. Due to temporary facilities, the surface pressure fluctuation is mainly concentrated in the roof area of the main girder. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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