Journal of Wind Engineering and Industrial Aerodynamics最新文献_第8页

Strengthening or decaying airborne pollution exposure inside urban street canyons: Multiple effects from solar radiation, synoptical wind speed and surface albedo 城市街道峡谷内空气污染暴露的增强或衰减：太阳辐射、天气风速和地表反照率的多重影响

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-11-21 DOI: 10.1016/j.jweia.2025.106292

Xin Zhang , Ming-Ming Wu , Shang-Xian Zhao , Zhao-Sheng Wei , Jiang-Hua Guo , Mikhail A. Sheremet , Fu-Yun Zhao

The synergistic effect of urban heat island (UHI) and particulate matter (PM) was recognized as a potential risk for increasing human exposure. This paper quantified the impact on PM_2.5 dispersion at the street-canyon scale by deconstructing the main driving factors of the UHI (solar radiation, wind speed, surface albedo). Cluster analysis was applied to classify characteristic thermal scenarios based on these drivers. Results revealed that the concentration of PM_2.5 on the leeward side was alleviated under conditions of low wind speeds and high radiation. The accumulation effect of PM on the windward side was decreased at high wind speeds and high radiation. The installation of active ventilation on the windward side with moderate wind speeds and on the leeward side with higher wind speeds could significantly improve the air quality in SC. The strengthening thermal effects exacerbated the accumulation of PM_2.5 on the windward side. The pollution concentrations on the windward side increased by 5 % for high thermal effects and decreased by 15 % for low. In addition, an optimal prediction framework for pollutants incorporating heat island driving factors was developed. This research provided a theoretical tool for the prevention and control of pollution exposure risks in high-density cities.

城市热岛（UHI）和颗粒物（PM）的协同效应被认为是增加人类暴露的潜在风险。本文通过解构城市热岛的主要驱动因子（太阳辐射、风速、地表反照率），量化了街道-峡谷尺度对PM2.5弥散的影响。基于这些驱动因素，采用聚类分析对特征热情景进行分类。结果表明：低风速、高辐射条件下，背风面PM2.5浓度有所缓解；在高风速和高辐射条件下，PM在迎风侧的累积效应减弱。在中等风速的迎风面和较大风速的背风面设置主动通风可以显著改善SC的空气质量，热效应的增强加剧了PM2.5在迎风面的积累。高热效应时迎风面污染浓度增加5%，低热效应时减少15%。此外，还建立了包含热岛驱动因子的污染物最优预测框架。本研究为高密度城市污染暴露风险的防控提供了理论工具。

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引用次数: 0

Numerical analysis and design of crest-fixed trapezoidal aluminium roof claddings under static wind uplift 静风隆升作用下固定顶盖梯形铝屋面覆层的数值分析与设计

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-11-20 DOI: 10.1016/j.jweia.2025.106262

Shubham Tiwari , Krishanu Roy , James B.P. Lim

The use of aluminium for roof claddings provides a durable alternative to cold-formed steel (CFS). However, these claddings can experience localised pull-through failure at the connections under wind uplift. Currently, no design guidelines exist for predicting the pull-through capacity of trapezoidal aluminium roof claddings. This study investigates the pull-through failure behaviour of trapezoidal aluminium roof claddings with wide pans and closely spaced ribs under static wind uplift. A finite element (FE) model was developed and validated against existing CFS trapezoidal cladding experimental tests under static wind uplift, with additional validation for representing the behaviour of aluminium as a material. Further, a comprehensive parametric study involving 698 FE models was conducted by varying material properties, thickness, geometry, cladding span, and screw head/washer diameter. The comparison of the parametric study results with predictions from existing aluminium design guidelines (Aluminium Design Manual (ADM 2020), Australia and New Zealand Standard (AS/NZS 1664), and Eurocode (EN 1999-1-4)) revealed that the design equations in these guidelines were inaccurate for predicting the pull-through capacity of trapezoidal aluminium claddings. Therefore, simplified design equations were developed to determine the pull-through capacity of trapezoidal aluminium claddings. Finally, a reliability analysis confirmed the high reliability of these proposed design equations.

使用铝作为屋顶覆层提供了一种耐用的冷弯型钢（CFS）替代品。然而，这些包层在风升作用下的连接处可能会出现局部的拉穿破坏。目前，没有设计准则存在，以预测梯形铝屋顶覆层的拉过能力。研究了静风抬升作用下宽盘密肋梯形铝屋面覆层的拉穿破坏行为。开发了一个有限元（FE）模型，并根据现有的CFS在静态风抬升下的梯形包层实验测试进行了验证，并对代表铝作为一种材料的行为进行了额外验证。此外，通过改变材料性能、厚度、几何形状、包层跨度和螺钉头/垫圈直径，对698个有限元模型进行了全面的参数化研究。参数化研究结果与现有铝设计指南（铝设计手册（ADM 2020）、澳大利亚和新西兰标准（AS/NZS 1664）以及欧洲规范（EN 1999-1-4））的预测结果进行了比较，结果表明，这些指南中的设计方程对于预测梯形铝包层的拉通能力是不准确的。因此，建立了简化的设计方程来确定梯形铝包壳的拉通能力。最后，可靠性分析证实了所提出的设计方程具有较高的可靠性。

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引用次数: 0

Impact of incoming flow on wake asymmetry of a simplified vehicle: The Reynolds number effect 来流对简化飞行器尾迹不对称的影响：雷诺数效应

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-11-20 DOI: 10.1016/j.jweia.2025.106291

Jie Zhang (张洁) , Teklay Gebremeskel Melaku , Abdulmalik Adamu , Getachew Dejen Tebeje

The influence of various incoming flow velocities, i.e., the Reynolds number (Re), on the wake asymmetry of a simplified vehicle has been studied, utilizing the named improved delayed detached eddy simulation (IDDES). The validation of the numerical method was completed by comparing the wake flow structure, the pressure gradients/probability distribution function (PDF), pressure distribution and aerodynamic drag with results from the prior IDDES study and experimental data. Five cases with Re of 1.0 × 10⁴, 2.7 × 10⁴, 1.0 × 10⁵, 1.6 × 10⁵, and 2.5 × 10⁵ were examined to explore the vehicle's wake asymmetry and aerodynamic features. As the incoming flow velocity changes, the results show distinct variations in wake vortex formations. Moreover, the PDF results and wake structures reveal there are two typical flow states. Furthermore, the distributions of mean pressure coefficients in the wake tend to decrease as the Re increases. Specifically, increasing the Re from 2.7 × 10⁴ to 1.0 × 10⁵, 1.6 × 10⁵ and 2.5 × 10⁵ (Flow state II) contributes to a reduction in the drag coefficient of 5.9 %, 6.35 % and 8.37 %, respectively. Conversely, reducing the Re to 1.0 × 10⁴ (Flow state I) results in a 6.14 % increase in the drag coefficient. These results confirm that the Re strongly influences the wake structure and drag of a simplified vehicle, offering guidance for appropriate inflow condition selection and insight into wake topology.

利用改进的延迟分离涡模拟（IDDES），研究了不同来流速度，即雷诺数（Re）对简化飞行器尾迹不对称性的影响。通过将尾流结构、压力梯度/概率分布函数（PDF）、压力分布和气动阻力与先前IDDES研究结果和实验数据进行比较，完成了数值方法的验证。在Re分别为1.0 × 104、2.7 × 104、1.0 × 105、1.6 × 105和2.5 × 105的情况下，研究了飞行器尾迹不对称性和气动特性。随着来流速度的变化，尾流涡的形成有明显的变化。此外，PDF结果和尾迹结构表明存在两种典型的流动状态。尾迹平均压力系数的分布随Re的增大而减小。具体来说，将Re从2.7 × 104提高到1.0 × 105、1.6 × 105和2.5 × 105（流动状态II）时，阻力系数分别降低了5.9%、6.35%和8.37%。相反，将Re降低到1.0 × 104（流动状态I）会导致阻力系数增加6.14%。这些结果证实了Re对简化飞行器的尾流结构和阻力有强烈的影响，为合理选择流入条件和深入了解尾流拓扑结构提供了指导。

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引用次数: 0

Driving safety assessment of high-sided vehicles on long-span truss suspension bridges subjected to crosswind 侧风作用下大跨度桁架悬索桥上高架车辆行驶安全评价

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-11-19 DOI: 10.1016/j.jweia.2025.106287

Jialong Li , Lei Yan , Xuhui He , Tongqing Lu

The driving safety of high-sided vehicles on bridges subjected to crosswind is a critical factor in determining whether the bridge should remain operational or be closed. To address this, this paper investigates the influence of aerodynamic interference on the driving safety of high-sided vehicles across different lanes of a large-span truss girder bridge and proposes a more rational traffic control strategy. First, the aerodynamic coefficients of trucks and buses in various lanes of the truss deck were determined based on wind tunnel tests. Subsequently, the influences of transverse correlation of road roughness, traffic lane position, wind speed, and level of road roughness on vehicle response and driving safety subjected to crosswind were investigated, utilizing the wind-vehicle-bridge coupled vibration system. Besides, the driving safety assessments of high-sided vehicles using varying accident risk coefficient criteria were compared. The results demonstrate that the aerodynamic coefficients exhibit sensitivity to vehicle type and lane position. The accident risk coefficient criterion using the maximum value method is more suitable for evaluating the driving safety of high-sided vehicles on large-span bridges. The critical wind speeds of high-side trucks and buses traveling in different lanes during bridge operation can exhibit significantly differences, necessitating more rational traffic control strategies.

在侧风作用下，高架车辆在桥梁上的行驶安全性是决定桥梁是继续运营还是关闭的关键因素。针对这一问题，本文研究了气动干扰对某大跨度桁架梁桥跨车道高边车辆行驶安全的影响，提出了更为合理的交通控制策略。首先，通过风洞试验确定了桁架桥面各车道货车和客车的气动系数；随后，利用风-车-桥耦合振动系统，研究了路面平整度、车道位置、风速和路面平整度的横向相关性对侧风作用下车辆响应和行驶安全性的影响。此外，还比较了不同事故风险系数标准对高架车辆驾驶安全评价的影响。结果表明，气动系数对车辆类型和车道位置具有敏感性。采用最大值法的事故风险系数判据更适合于评价大跨度桥梁上的高边车辆的行驶安全性。在桥梁运行过程中，不同车道行驶的高侧货车和客车的临界风速会出现显著差异，需要更合理的交通控制策略。

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引用次数: 0

A benchmark between two different numerical models for ice galloping prediction 两种不同的冰驰预报数值模型之间的基准

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-11-19 DOI: 10.1016/j.jweia.2025.106285

Federico Zanelli , Giuseppe Bucca , Stefano Melzi , Sonia Zuin , Giorgio Diana , Saki Taruishi , Hisato Matsumiya

Galloping is a wind-induced phenomenon which can lead conductors of transmission lines to instability due to the presence of ice accretions. The paper presents results obtained with two different numerical approaches used to estimate galloping amplitudes on overhead transmission lines. The benchmark case relates to a 400 m single span of four-bundled conductor. A triangular shape of ice, whose aerodynamic coefficients are known by previous experiments in the wind tunnel, is considered as applied to the conductors. The two numerical models described in the paper are based on significantly different approaches even though both use the quasi-steady theory (QST) to reproduce the motion dependent aerodynamic forces. The first model relies on a full non-linear FE model running in time domain, while the second is mainly based on the energy balance method. Despite the different approach in modelling, the estimation of galloping amplitudes considering different ice shape configurations matches with a maximum error of 11 % in the estimation of the maximum vertical amplitude reached at midspan. Consequently, the two approaches can be employed to optimize the configuration of anti-galloping devices on a transmission line. Moreover, this work can represent a robust benchmark for assessing the validity of newly developed galloping models.

疾驰是一种由风引起的现象，由于冰的存在，它会导致输电线路的导体不稳定。本文介绍了用两种不同的数值方法估计架空输电线路上的驰动幅度所得到的结果。基准案例涉及400m单跨四束导线。一个三角形的冰，其空气动力系数是已知的，在以前的风洞实验中，被认为是适用于导体。本文中描述的两个数值模型基于明显不同的方法，尽管它们都使用准稳态理论（QST）来重现运动相关的气动力。第一个模型依赖于在时域运行的全非线性有限元模型，而第二个模型主要基于能量平衡方法。尽管建模方法不同，但考虑不同冰形配置的驰骋振幅估计与在跨中达到的最大垂直振幅估计相匹配，最大误差为11%。因此，这两种方法可用于优化传输线上防驰振装置的配置。此外，这项工作可以代表一个稳健的基准评估新开发的驰骋模型的有效性。

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引用次数: 0

Investigation of wind profile and turbulent transport patterns in complex mountainous terrain based on clustering analysis 基于聚类分析的复杂山地地形风廓线和湍流输送模式研究

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-11-18 DOI: 10.1016/j.jweia.2025.106289

Tingyuan Yan , Jingxi Qin , Mingjin Zhang , Jiale Long , Jinxiang Zhang , Yongle Li

The wind field in mountainous regions is shaped by the combined effects of complex terrain and atmospheric stratification, resulting in diverse wind profile structures. This study utilized Doppler wind profilers and sonic anemometers for long-term field observations, aiming to identify wind profile patterns and their associated turbulent transport characteristics in complex mountainous regions. Unsupervised clustering analysis of the observed wind profile data was performed using a Self-Organizing Map (SOM) neural network. The results characterize the spatiotemporal evolution of wind profiles from the perspective of typical thermal stratification in mountainous wind fields. Based on the vertical transport of momentum and heat, the study identifies the turbulent transport characteristics and atmospheric stability regimes associated with different wind profile patterns. Furthermore, Evolutionary Power Spectral Density (EPSD) analysis reveals the time-frequency distribution of turbulent kinetic energy throughout wind profile evolution, highlighting the substantial impact of atmospheric stability on the partitioning of wind energy.

山区风场受复杂地形和大气分层的共同作用，形成了不同的风廓线结构。本研究利用多普勒风廓线仪和声速风速仪进行了长期的野外观测，旨在确定复杂山区的风廓线模式及其相关的湍流输送特征。利用自组织图（SOM）神经网络对观测风廓线数据进行无监督聚类分析。研究结果从典型热分层的角度刻画了山区风场风廓线的时空演变特征。基于动量和热量的垂直输送，研究确定了与不同风廓线型相关的湍流输送特征和大气稳定性机制。此外，演化功率谱密度（EPSD）分析揭示了风廓线演化过程中湍流动能的时频分布，强调了大气稳定性对风能分配的重要影响。

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引用次数: 0

Variations in fundamental statistics of wind speeds based on high-frequency meteorological station data in Fukuoka, Japan 基于日本福冈高频气象站数据的风速基本统计的变化

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-11-18 DOI: 10.1016/j.jweia.2025.106286

Sankang Yin , Yezhan Li , Naoki Ikegaya

Gustiness of turbulent outdoor wind has attracted significant research interest recently. Computational fluid dynamics (CFD) simulations and wind-tunnel experiments (WTEs) perform well in reproducing microscale turbulent phenomena. However, outdoor wind fields consist of the superimposition of various-scale turbulent phenomena covering from microscale to mesoscale. To effectively apply the knowledge obtained from WTEs and CFD, it is essential to clarify the statistical characteristics of realistic outdoor airflow at time scales shorter than the period defined by the spectral gap split. Therefore, based on high-frequency meteorological data, the variation in the fundamental statistics in 10 min of outdoor airflow was stochastically examined for a coastal region of Japan, Fukuoka. The relationship between statistics holds across various observation stations. Additionally, the probability density functions (PDFs) of the statistics exhibit a high degree of consistency regardless of location. Furthermore, specific weak wind conditions were differentiated by using higher-order statistics and peaks of the wind speeds in 10 min. This also clarifies the necessity of PDF models for actual weak wind conditions. These findings are expected to enhance the understanding of how real complex terrain influences wind field characteristics in urban areas and provide data support for developing statistical models for CFD simulations and WTEs.

近年来，室外湍流风的脉动特性引起了人们的广泛关注。计算流体力学（CFD）模拟和风洞实验（WTEs）在再现微尺度湍流现象方面表现良好。然而，室外风场是由从微尺度到中尺度的各种尺度湍流现象叠加而成。为了有效地应用从WTEs和CFD中获得的知识，有必要澄清实际室外气流在比谱隙分裂定义的时间尺度更短的时间尺度上的统计特征。因此，基于高频气象数据，对日本福冈沿海地区10分钟室外气流基本统计量的变化进行了随机检验。不同观测站的统计数据之间的关系是相同的。此外，无论位置如何，统计数据的概率密度函数（pdf）都表现出高度的一致性。此外，利用高阶统计量和10 min风速峰值来区分特定的弱风条件。这也阐明了实际弱风条件下PDF模型的必要性。这些发现有望增强对真实复杂地形如何影响城市地区风场特征的理解，并为开发CFD模拟和wte的统计模型提供数据支持。

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引用次数: 0

Effect of built-up area expansion on urban ventilation over Loess Tableland valley terrain under stable background wind 稳定背景风条件下黄土塬谷地形建成区扩张对城市通风的影响

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-11-18 DOI: 10.1016/j.jweia.2025.106288

Zhuolei Yu , Yi Wang , Songheng Wu , Jukun Wang , Xiaoxue Wang

The urbanization process in the Loess Plateau region, while promoting economic development, also faces the problem that ambient air is seriously polluted. Good urban ventilation can alleviate the contradiction between urban development and livable environment. Therefore, the study focuses on the effect of built-up area expansion on ventilation characteristics for Loess Tableland valley town under the stable background wind. The results simulated by the city-scale computational fluid dynamics (CSCFD) model show that the ventilation performance of urban canopy layer (UCL) with direct interaction between the stable background wind and street canyon airflow is significantly better than that of the UCL with indirect interaction. When the built-up area expands on the valley floor, the expansion is favorable to improve the air quality in the UCL at the background Reynolds number (Re_b) less than 5.80 × 10⁵. When the built-up area expands on the top surface of Loess Tableland, the expansion at Re_b ≥ 1.55 × 10⁶ causes a maximum increase of 133.21 % and 64.47 % in the average air age in the upstream UCL and downstream UCL, respectively, which deteriorates the air quality in both the UCLs. This study provides a theoretical reference for future urban planning and optimum location of industrial zones.

黄土高原地区城市化进程在促进经济发展的同时，也面临着环境空气严重污染的问题。良好的城市通风可以缓解城市发展与宜居环境之间的矛盾。因此，本文研究的重点是稳定背景风条件下黄土塬区河谷城镇建成区扩张对通风特性的影响。城市尺度计算流体动力学（CSCFD）模型模拟结果表明，稳定背景风与街道峡谷气流直接交互作用下的城市冠层通风性能明显优于间接交互作用下的城市冠层。当建成区在山谷底扩展时，当背景雷诺数（Reb）小于5.80 × 105时，扩展有利于改善UCL内的空气质量。当黄土塬上地表建成区扩张时，Reb≥1.55 × 106的扩张幅度最大，上游和下游的平均空气龄分别增加了133.21%和64.47%，导致上游和下游的空气质量恶化。该研究为未来城市规划和工业园区优化选址提供了理论参考。

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引用次数: 0

Effects of discrete fairings on torsional aerodynamic vibrations of a bridge deck 离散整流罩对桥面扭转气动振动的影响

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-11-11 DOI: 10.1016/j.jweia.2025.106272

Thet Ei, Kyohei Noguchi, Hisato Matsumiya, Saeri Hara, Tomomi Yagi

Discrete fairings are short fairing segments arranged at intervals along the bridge deck. This study examines the effect of the interval and length of discrete fairings on aerodynamic instability, with particular emphasis on their potential to cause additional three-dimensional effects. Therefore, the flutter and vortex-induced vibration (VIV) characteristics of a torsional one-degree-of-freedom system featuring a 10:1 rectangular prism were examined. Two parameters were utilized to define the discrete fairings: fairing ratio— the ratio of a fairing length to the summation of a fairing length and an interval—and fairing length. A series of wind tunnel tests were conducted on a rectangular prism with and without solid walls to examine the aerodynamic performance of the discrete fairings. The results indicated that all configurations with discrete fairings, except the case with a single fairing, suppressed torsional flutter. Even a single fairing demonstrated improved performance, likely attributed to enhanced flow separation characteristics. For prisms with solid walls, all discrete fairing setups—except a certain case—significantly reduced VIV amplitudes compared with full fairings, attributed to the generation of additional three-dimensional effects, although torsional flutter was not eliminated. These results highlight the significance of additional three-dimensional effects of discrete fairings in enhancing aerodynamic stability.

离散整流罩是沿桥面间隔布置的短整流罩。本研究考察了离散整流罩的间隔和长度对气动不稳定性的影响，特别强调了它们可能引起额外的三维效应。为此，对10:1矩形棱镜扭转一自由度系统的颤振和涡激振动特性进行了研究。使用两个参数来定义离散整流罩：整流罩比-整流罩长度与整流罩长度和间隔之和的比率和整流罩长度。在带和不带固体壁的矩形棱镜上进行了一系列风洞试验，以检验离散整流罩的气动性能。结果表明，除单个整流罩外，所有带有离散整流罩的结构都能抑制扭转颤振。即使是单个整流罩也表现出了更好的性能，这可能归功于增强的流动分离特性。对于具有实心壁的棱镜，除某些情况外，所有离散整流罩的设置与完整整流罩相比，显著降低了涡激振动幅度，这归因于产生了额外的三维效应，尽管扭转颤振并未消除。这些结果突出了离散整流罩附加三维效应在提高气动稳定性方面的重要性。

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引用次数: 0

Effects of turbulence intensity on the running safety of trains on large-span suspension bridges in mountainous areas 湍流强度对山区大跨度悬索桥上列车运行安全的影响

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-11-10 DOI: 10.1016/j.jweia.2025.106273

Haobo Liang , Yunfeng Zou , Chenzhi Cai , Xiangrong Guo , Xuhui He

Maintaining the running safety of high-speed trains subjected to crosswinds remains a critical challenge in railway bridge engineering. This issue is particularly pronounced in mountainous regions, where long-span bridges are frequently exposed to highly turbulent winds. The turbulent nature in such environments significantly affects the aerodynamic behavior of bluff bodies such as trains and bridges. This study investigates how varying levels of turbulence intensity (I_u), ranging from 4.88 % to 13.47 % under a fixed integral length scale (L_u), affect the aerodynamic characteristics and dynamic interactions within a train-bridge system. Results from wind tunnel tests and numerical modeling reveal that turbulent inflow reduces the drag forces on both the train and the bridge compared with nearly smooth conditions. As the I_u increases, the mean wind load acting on the train's windward side decreases. However, pressure fluctuations become more pronounced and are expressed as root-mean-square (RMS) values. A three-dimensional coupled vibration model was developed to further examine these effects. The analysis reveals that the lateral displacement and safety-related indices (e.g., derailment coefficient) of the train increase as I_u rises. At an I_u of 13.47 %, the derailment coefficient of the train is observed to increase by 17.86 % compared with that under smooth flow conditions. These results demonstrate that the train's dynamic responses are highly sensitive to pulsating pressure variations in turbulent wind fields. The findings provide valuable insights into the aerodynamic stability and safety assessment of high-speed rail systems operating on long-span bridges exposed to complex turbulent winds typical of mountainous terrains.

保持高速列车在侧风作用下的运行安全一直是铁路桥梁工程面临的重要挑战。这个问题在山区尤其明显，那里的大跨度桥梁经常暴露在强烈的湍流中。在这样的环境中，湍流的性质会显著影响诸如火车和桥梁等钝体的气动性能。本文研究了在固定积分长度尺度（Lu）下，湍流强度（Iu）在4.88% ~ 13.47%之间的变化对列车-桥梁系统气动特性和动力相互作用的影响。风洞试验和数值模拟结果表明，与接近平稳的条件相比，湍流流入降低了列车和桥梁的阻力。随着u的增大，作用在列车迎风侧的平均风荷载减小。然而，压力波动变得更加明显，并以均方根（RMS）值表示。建立了一个三维耦合振动模型来进一步研究这些影响。分析表明，列车横向位移和安全相关指标（如脱轨系数）随Iu的增大而增大。当流量为13.47%时，列车的脱轨系数比平流条件下提高了17.86%。结果表明，在紊流风场中，列车的动力响应对脉动压力变化非常敏感。研究结果为高铁系统的气动稳定性和安全评估提供了有价值的见解，这些高铁系统运行在大跨度桥梁上，暴露在山区典型的复杂湍流中。

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引用次数: 0