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Wind and Structures Volume 23, Number 3, September 2016 , pages 171-189 DOI: https://doi.org/10.12989/was.2016.23.3.171 |
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Aerodynamic performance of a novel wind barrier for train-bridge system |
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Xuhui He, Kang Shi, Teng Wu, Yunfeng Zou, Hanfeng Wang and Hongxi Qin
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| Abstract | ||
| An adjustable, louver-type wind barrier was introduced in this study for improving the running safety and ride comfort of train on the bridge under the undesirable wind environment. The aerodynamic characteristics of both train and bridge due to this novel wind barrier was systematically investigated based on the wind tunnel tests. It is suggested that rotation angles of the adjustable blade of the louver-type wind barrier should be controlled within 90 to achieve an effective solution in terms of the overall aerodynamic performance of the train. Compared to the traditional grid-type wind barrier, the louver-type wind barrier generally presents better aerodynamic performance. Specifically, the larger decrease of the lift force and overturn moment of the train and the smaller increase of the drag force and torsional moment of the bridge resulting from the louver-type wind barrier were highlighted. Finally, the computational fluid dynamics (CFD) technique was applied to explore the underlying mechanism of aerodynamic control using the proposed wind barrier. | ||
| Key Words | ||
| louver-type wind barrier; aerodynamic coefficients; wind tunnel test; CFD | ||
| Address | ||
| Xuhui He, Kang Shi, Yunfeng Zou, Hanfeng Wang and Hongxi Qin: School of Civil Engineering, Central South University, Changsha, 410075, China; National Engineering Laboratory for High Speed Railway Construction, Changsha, 410075, China Teng Wu: Department of Civil, Structural and Environmental Engineering,University at Buffalo-The State Univ. of New York, Buffalo, NY 14260, USA | ||