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Unraveling the impact of cutting transition section on the aerodynamic loads of high-speed trains: Utilizing the IDDES approach

路堑过渡段对高速列车气动荷载的影响:基于IDDES方法

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Abstract

The aerodynamic load of high-speed trains (HSTs) undergoes significant changes when they pass through the transition section of the cutting under crosswind conditions. This paper establishes a coupled train-cutting-wind three-dimensional aerodynamic model based on the improved delayed detached eddy simulation turbulence model, focusing on the influence of the cutting depth on the change of aerodynamic load and the deterioration of the train’s aerodynamic performance, while also revealing the mechanism of the evolution of the flow field. The results indicate that at the cutting depth of 6 m, the aerodynamic impact energy of the head train during operation is at its highest. As the train completely enters the next operational scenario, with an increase in the cutting depth, the impact of incoming flow on the aerodynamic loads of the train is diminished, leading to a corresponding reduction in fluctuation amplitude. The magnitude of the head train’s abrupt change in aerodynamic load has a near-linear positive correlation with the wind speed.

摘要

当高速列车在横风条件下通过路堑过渡段时,列车的气动荷载将发生显著变化。本文基于改进 的延迟分离涡湍流模型建立了列车-路基-风的三维空气动力学耦合模型,重点探讨了路堑深度对列车 气动载荷变化和气动性能恶化的影响,揭示了相应的列车周围流场的演化机制。结果表明:当路堑深 度为6 m时,头车所受的气动冲击能量最高。在列车完全驶入下一运行场景后,随着路堑深度的增大, 来流对列车气动荷载的影响减弱,相应的波动幅度降低。头车气动载荷的突变幅值与风速近似满足线 性正相关关系。

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Authors and Affiliations

  1. School of Civil Engineering, Central South University, Changsha, 410075, China

    Lun Zhao  (赵伦), Wei-chao Yang  (杨伟超) & Wen Zhao  (赵文)

  2. National Rail Transit Electrification and Automation Engineering Technology Research Center (Hong Kong Branch), The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China

    E. Deng  (邓锷) & Yi-qing Ni  (倪一清)

  3. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China

    E. Deng  (邓锷) & Yi-qing Ni  (倪一清)

  4. The Hong kong Polytechnic University Shenzhen Research Institute, Shenzhen, China

    Lun Zhao  (赵伦) & E. Deng  (邓锷)

  5. National Engineering Research Center of High-speed Railway Construction Technology, Central South University, Changsha, 410075, China

    Wei-chao Yang  (杨伟超)

  6. China Railway Eryuan Engineering Group Co., Ltd., Chengdu, 610031, China

    Lu-sen Luo  (罗禄森)

Authors
  1. Lun Zhao  (赵伦)
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  2. E. Deng  (邓锷)
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  3. Wei-chao Yang  (杨伟超)
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  5. Wen Zhao  (赵文)
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  6. Lu-sen Luo  (罗禄森)
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Contributions

ZHAO Lun completed the data curation and edited the draft of the manuscript and revised the manuscript. DENG E conducted the literature review and edited the draft of the manuscript and provided the funding acquisition and supervision. YANG Wei-chao provided the conceptualization and supervision and funding acquisition. NI Yi-qing revised the manuscript. ZHAO Wen provided the resources. LUO Lu-sen provided the resources.

Corresponding author

Correspondence to E. Deng  (邓锷).

Ethics declarations

ZHAO Lun, DENG E, YANG Wei-chao, NI Yi-qing, ZHAO Wen, and LUO Lu-sen declare that they have no conflict of interest.

Additional information

Foundation item: Project(52308419) supported by the National Natural Science Foundation of China; Project(R-5020-18) supported by the Research Grants Council, University Grants Committee of the Hong Kong Special Administrative Region (SAR), China; Project (K-BBY1) supported by the Innovation and Technology Commission of the Hong Kong SAR Government, China; Project(1-W21Q) supported by the Hong Kong Polytechnic University’s Postdoc Matching Fund Scheme, China; Project(Major Project, 2021-Major-01) supported by Science and Technology Research and Development Program Project of China Railway Group Limited;Project (N2022G031) supported by the Science and Technology Research and Development Program Project of China Railway; Project (Major Project, 2022-Key-22) supported by the Science and Technology Research and Development Program Project of China Railway Group Limited

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Zhao, L., Deng, E., Yang, Wc. et al. Unraveling the impact of cutting transition section on the aerodynamic loads of high-speed trains: Utilizing the IDDES approach. J. Cent. South Univ. 31, 989–1002 (2024). https://doi.org/10.1007/s11771-024-5595-6

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  • DOI: https://doi.org/10.1007/s11771-024-5595-6

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