4.6 Article

Influence of wind barrier on the transient aerodynamic performance of high-speed trains under crosswinds at tunnel-bridge sections

出版社

TAYLOR & FRANCIS LTD
DOI: 10.1080/19942060.2021.1918257

关键词

Crosswind; porous wind barrier (PWB); tunnel– bridge section (TBS); high-speed train (HST); aerodynamic coefficient

资金

  1. National Natural Science Foundation of China [51978670]
  2. China National Funds for Distinguished Young Scientists [51925808]
  3. Project of Science and Technology and Development Plan of China National Railway Group Co., Ltd [K2019G041, KYY2020138(2022)]

向作者/读者索取更多资源

The study focuses on the influence mechanism of porous wind barriers (PWBs) in tunnel-bridge section (TBS) along high-speed railway lines. Results show that PWBs can reduce aerodynamic load coefficients of trains by 36-95%, but design parameters should not be the same along the full-length PWB on the tunnel-bridge-tunnel infrastructure (TBTI). Adjustments in PWB height and porosity in the TBS are necessary to achieve equivalent windproof performance.
Porous wind barriers (PWBs) are gradually applied to tunnel-bridge-tunnel infrastructures (TBTIs) along high-speed railway lines. Due to the remarkable aerodynamic effect of high-speed trains (HSTs), the windproof performance of a PWB at tunnel-bridge section (TBS) is particularly critical when a HST passes through the TBTI under crosswind. And it seems to be easily ignored by researchers. This study aims to determine the influence mechanism of the PWB in the TBS. A CFD dynamic model of air-train-PWB was built based on porous media theory, and its reliability is verified by model and field tests. The main results are as follows: the corresponding variation amplitudes of the train's aerodynamic load coefficients are reduced by 36-95% when a PWB is set in the TBS; adopting the same design parameters along the full-length PWB on the TBTI is unreasonable; the PWB height and porosity in the TBS must be increased and reduced more than 33%, respectively, to achieve equivalent windproof performance. The conclusions in this paper can provide a preliminary idea for the optimization design of the PWB on the TBTI.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据