路堑过渡段对高速列车气动荷载的影响:基于IDDES方法

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

赵伦 ¹邓锷 ²杨伟超 ³倪一清 ⁴赵文 ⁵罗禄森⁶

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作者信息

1. School of Civil Engineering,Central South University,Changsha 410075,China;The Hong kong Polytechnic University Shenzhen Research Institute,Shenzhen,China
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;Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hung Hom,Hong Kong,China;The Hong kong Polytechnic University Shenzhen Research Institute,Shenzhen,China
3. School of Civil Engineering,Central South University,Changsha 410075,China;National Engineering Research Center of High-speed Railway Construction Technology,Central South University,Changsha 410075,China
4. 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
5. School of Civil Engineering,Central South University,Changsha 410075,China
6. China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China
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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.

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.

关键词

高速列车/路堑过渡段/气动荷载/流场/横风

Key words

high-speed trains/cutting transition section/aerodynamic load/flow field/crosswind

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基金项目

国家自然科学基金(52308419)

Research Grants Council,University Grants Committee of the Hong Kong Special Administrative Region(SAR),China(R-5020-18)

Innovation and Technology Commission of the Hong Kong SAR Government,China(K-BBY1)

Hong Kong Polytechnic University's Postdoc Matching Fund Scheme,China(1-W21Q)

Science and Technology Research and Development Program Project of China Railway Group Limited(Major Project)(2021-Major-01)

Science and Technology Research and Development Program Project of China Railway(N2022G031)

Science and Technology Research and Development Program Project of China Railway Group Limited(Major Project)(2022-Key-22)

出版年

2024

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

参考文献量25

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