首页|路堑过渡段对高速列车气动荷载的影响:基于IDDES方法

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

high-speed trainscutting transition sectionaerodynamic loadflow fieldcrosswind

赵伦、邓锷、杨伟超、倪一清、赵文、罗禄森

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

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

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

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

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

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

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高速列车 路堑过渡段 气动荷载 流场 横风

国家自然科学基金Research Grants Council,University Grants Committee of the Hong Kong Special Administrative Region(SAR),ChinaInnovation and Technology Commission of the Hong Kong SAR Government,ChinaHong Kong Polytechnic University's Postdoc Matching Fund Scheme,ChinaScience and Technology Research and Development Program Project of China Railway Group Limited(Major Project)Science and Technology Research and Development Program Project of China RailwayScience and Technology Research and Development Program Project of China Railway Group Limited(Major Project)

52308419R-5020-18K-BBY11-W21Q2021-Major-01N2022G0312022-Key-22

2024

10.1007/s11771-024-5595-6

中南大学学报(英文版)
中南大学

中南大学学报(英文版)

CSTPCDEI
影响因子：0.47
ISSN：2095-2899
年,卷(期)：2024.31(3)
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