Journal of Wind Engineering and Industrial Aerodynamics最新文献_第3页

On-road pressure measurements on a full scale heavy-duty truck 在全尺寸重型卡车上进行道路压力测量

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-04-01 Epub Date: 2026-02-18 DOI: 10.1016/j.jweia.2026.106387

I. Kurek , T. Castelain , M. Michard , D. Chacaton , S. Bholah , B. Pellarin

An experimental study of the pressure distribution at the rear of a full tractor–trailer vehicle is presented. The influence of the underbody flow blockage is investigated. The measurements are performed using a differential pressure sensor. Stability of reference pressure during tests is required, and its knowledge allows to sort measurements in terms of reliability. A device is designed to measure the reference pressure and a corrective term allows it to be related to the atmospheric pressure in rolling conditions. The estimated repeatability of the measurements is around 1% for a reference underbody configuration. For various opening ratio of the underbody, changes in the overall pressure force on the rear surface, denoted by the product

S 〈 \bar{C_{p}} 〉

between the area of the rear surface

S

and the spatial average of the pressure coefficient

〈 \bar{C_{p}} 〉

, are mostly driven by the changes in rear surface. Finally, configurations with constant free spaces whose position are varying were considered. In this case, the vertical position of the free space is of primary importance for

S 〈 \bar{C_{p}} 〉

, with relative variations up to 18% between the lower and upper positions of the ground clearance free space.

对一辆全牵引挂车的尾部压力分布进行了实验研究。研究了底体流动堵塞的影响。使用差压传感器进行测量。在测试过程中需要参考压力的稳定性，并且它的知识允许根据可靠性对测量进行排序。设计了一种测量参考压力的装置，并设计了一种校正项，使其与轧制条件下的大气压力相关。对于参考底盘配置，估计测量的重复性约为1%。对于不同的下车身开度比，后表面总压力的变化，以后表面面积S与压力系数< Cp¯>的空间平均值的乘积S < Cp¯>表示，主要是由后表面的变化驱动的。最后，考虑了具有恒定自由空间且位置变化的构型。在这种情况下，对于S < Cp¯>，自由空间的垂直位置是最重要的，离地间隙自由空间的上下位置之间的相对变化高达18%。

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引用次数: 0

Aeroelastic response of undamaged and partially damaged transmission towers subjected to downburst-like outflows 未损坏和部分损坏输电塔在类似下爆流作用下的气动弹性响应

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-03-01 Epub Date: 2026-01-20 DOI: 10.1016/j.jweia.2026.106357

Mohamed Eissa , Kehinde J. Alawode , Amal Elawady

Power infrastructures encounter intensified weather-related events capable of causing widespread destruction and endangering the safety of residential communities in the USA and worldwide. This study investigates the wind-induced response of both damaged and undamaged transmission towers subjected to downburst-induced wind loads through experimental simulations conducted on 1:50 aeroelastic models at the Wall of Wind Experimental Facility. The purpose of this paper is to understand the dynamic behavior under a damage scenario, which represents two possible sources of vulnerabilities in power transmission systems: (1) aging effect and (2) exposure to successive extreme weather events that hinder timely maintenance, which adds a unique layer of realism. The structural damage is introduced experimentally by removing specific members with the goal of reducing the natural frequency of the tower model. Results indicate that structural damage increases the RMS acceleration responses by 86 % in the along-wind direction and 74 % in the across-wind direction. In the damaged tower, higher vibrational modes amplify wind-induced vibrations at the tower top by factors of 1.74 in the along-wind direction and 1.90 in the across-wind direction compared to the cross-arm level. Furthermore, time-frequency analysis reveals that although both higher and lower fundamental modes of vibration contribute to the response in the damaged tower case, higher resonance modes are less significant in the damaged tower than in the undamaged tower. Evidently, both towers exhibit non-quasi-static behavior under downburst wind loading. Overall, the findings clearly demonstrate that structural damage has a pronounced influence on the dynamic response of standalone lattice transmission towers and should not be overlooked in post-event assessment following extreme wind events.

在美国和世界范围内，电力基础设施遇到了加剧的天气相关事件，这些事件能够造成大范围的破坏并危及住宅社区的安全。本研究通过在风力试验设施墙上进行1:50气动弹性模型的实验模拟，研究了受损和未受损输电塔在下突风荷载作用下的风致响应。本文的目的是了解输电系统在损坏场景下的动态行为，这代表了两种可能的脆弱性来源：(1)老化效应；(2)暴露于连续的极端天气事件中，阻碍及时维护，这增加了一层独特的现实性。以降低塔的固有频率为目标，通过去除特定构件来引入结构损伤。结果表明，结构损伤使顺风向RMS加速度响应增加86%，横风向RMS加速度响应增加74%。在受损塔中，与横臂水平相比，较高的振动模态将塔顶的风致振动放大了1.74倍的顺风向和1.90倍的横风向。此外，时频分析表明，尽管高阶和低阶基振模态对损伤塔的响应都有贡献，但高阶共振模态在损伤塔中的作用不如未损伤塔的显著。显然，在下突风荷载作用下，两座塔都表现出非准静态的性能。总体而言，研究结果清楚地表明，结构损伤对独立式晶格传输塔的动力响应有显著影响，在极端风事件后的事后评估中不应忽视。

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引用次数: 0

Investigation of train-embankment relative motion modes on aerodynamic performance of a high-speed train under crosswind 侧风作用下列车-路堤相对运动模式对高速列车气动性能的影响研究

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-03-01 Epub Date: 2026-01-23 DOI: 10.1016/j.jweia.2026.106356

Jie Zhang , Getachew Dejen Tebeje , Abdulmalik Adamu , Teklay Gebremeskel Melaku , Guangjun Gao

The high-speed train (HST) running on embankments faces safety risks from intense crosswinds, potentially leading to derailments. Accurate simulation of the relative motion modes under crosswind is crucial to understanding aerodynamic load variations. This study investigates the aerodynamic characteristics of an HST on an embankment using two numerical methods: the static synthesis method (SSM) and the dynamic decomposition method (DDM). The improved delayed detached eddy simulation (IDDES) approach was used to analyse the flow field around the train, comparing aerodynamic loads, pressure distributions, and flow characteristics under two motion modes. Results show that varying velocity-inlet boundaries significantly impact flow characteristics around the embankment during strong crosswinds. In contrast, the SSM and the DDM effectively reduce the train's side force coefficient (C_y), lift force coefficient (C_z), and overturning moment (C_mx) by 16.9 %, 12.1 %, and 18.5 %, respectively. These findings provide important data to support the formulation of operational standards for high-speed trains (HSTs) running on embankments.

在路堤上运行的高速列车（HST）面临着来自强烈侧风的安全风险，可能导致脱轨。准确模拟侧风作用下的相对运动模式对理解气动载荷变化至关重要。本文采用静态综合法和动态分解法两种数值方法研究了路基上高速公路的气动特性。采用改进的延迟分离涡模拟（IDDES）方法分析了列车周围的流场，比较了两种运动模式下的气动载荷、压力分布和流动特性。结果表明，在强侧风条件下，不同的速度入口边界对路堤周围的流动特性有显著影响。相比之下，SSM和DDM能有效降低列车侧力系数（Cy）、升力系数（Cz）和倾覆力矩（Cmx），分别降低16.9%、12.1%和18.5%。这些发现为制定高速列车在河堤上运行的运行标准提供了重要的数据支持。

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引用次数: 0

A wind-tunnel study of the effect of sheared wind profiles on the aerodynamic drag of passenger vehicle models 剪切风廓线对乘用车模型气动阻力影响的风洞研究

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-03-01 Epub Date: 2026-01-23 DOI: 10.1016/j.jweia.2026.106358

Fenella de Souza, Brian McAuliffe, Hali Barber, Bernard Tanguay

The effect of shear and skewness of the apparent wind approaching a passenger vehicle, due to variations of the terrestrial wind speed with height, was investigated. Based on terrestrial wind profiles measured adjacent to a test track, two highly sheared and skewed apparent-wind profiles were simulated at 15% scale in a wind tunnel to determine their effect on the aerodynamic drag and surface pressures of passenger vehicle models. The results show that the common track-test procedure of measuring the reference wind speed and angle at vehicle half-height, without regard for vertical variations, can underestimate the drag coefficient by 1% to 12% in windy conditions. Using a reference wind speed based on the average wind speed, or the average squared wind speed, over the height of the vehicle improved the prediction, although the discrepancy was still up to 7%. These averaged reference wind speeds, as well as the equivalent apparent-wind angle at which a uniform profile would produce the same drag coefficient as a sheared and twisted profile, were lower than the apparent-wind speed and angle at vehicle half-height for both simulated profiles. Importantly, they also occurred below vehicle half-height in the simulated profiles. The drag coefficient in the sheared and twisted apparent winds was lower than for uniform crosswinds at the same half-height yaw angle. This highlights the strong influence of flow conditions around the lower half of the vehicle on the aerodynamic drag coefficient, which was corroborated by surface pressure data. The implications for track testing are that, in the absence of apparent-wind profile measurements, it would be more appropriate to measure the reference apparent-wind speed and angle below rather than at vehicle half-height, in agreement with the recommendations of other researchers. The results of this study also have implications for wind-averaged drag computations.

研究了地面风速随高度变化对接近客车的视风切变和偏度的影响。基于测试轨道附近实测的地面风廓线，在风洞中以15%的比例尺模拟了两条高度剪切和倾斜的明显风廓线，以确定它们对乘用车模型气动阻力和表面压力的影响。结果表明，在不考虑垂直方向变化的情况下，采用在车辆半高处测量参考风速和参考风向角的常规轨道试验方法，在多风条件下会低估1% ~ 12%的阻力系数。使用基于车辆高度的平均风速或平均平方风速的参考风速改进了预测，尽管误差仍高达7%。这些平均参考风速，以及等效的明显风角，在这种情况下，均匀的轮廓将产生与剪切和扭曲的轮廓相同的阻力系数，低于两种模拟轮廓在车辆半高处的明显风速和角度。重要的是，在模拟剖面中，它们也发生在车辆半高以下。在相同半高偏航角的均匀侧风条件下，剪切风和扭曲风的阻力系数较低。这凸显了飞行器下半部分周围的流动条件对气动阻力系数的强烈影响，这一点得到了表面压力数据的证实。这对轨道测试的影响是，在没有明显风廓线测量的情况下，测量参考明显风速和角度比在车辆半高处测量更合适，这与其他研究人员的建议一致。这项研究的结果对风平均阻力计算也有影响。

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引用次数: 0

Aerodynamic performance and operational safety of high-speed trains in crosswind: visualization and analysis of mapping knowledge domain 横风下高速列车的气动性能与运行安全：制图知识域的可视化与分析

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-03-01 Epub Date: 2026-01-16 DOI: 10.1016/j.jweia.2026.106337

Zi-Jian Guo , Cheng Peng , Zhan-Hao Guo , Yuan-Jiang Zeng , Jia-Hao Lu , Zheng-Wei Chen

High-speed rail systems deliver substantial capacity, efficiency, and reliability, yet their susceptibility to crosswind effects increases with higher operating speeds. Employing a mapping knowledge domain (MKD) approach, this study provides a comprehensive analysis of the development trends in research on aerodynamic performance and operational safety of trains in crosswind environments, drawing on papers published from 1981 through 2025 in the Science Citation Index Expanded (SCIE) and Social Science Citation Index (SSCI). Knowledge mapping tools VOSviewer and Sci2 Tool are utilized, with key findings as follows: (1) Publication output exhibited gradual growth from 1981 to 2009, followed by a marked increase thereafter and China has emerged as the principal contributor to research on this field, particularly in engineering applications; (2) Multidimensional network analyses of authorship, institutional, and international collaborations reveal cooperative links among leading universities and research teams worldwide; (3) Document co-citation and keyword co-occurrence analyses have been employed to delineate subfields and synthesize frontier advancements within each; (4) Burst detection analysis reveals emerging research trends, such as “wind barrier” and “dynamic response”, which are likely to become key areas of focus in ensuring the stable and safe operation of trains under crosswind conditions in the future. This review provides scholars with a coherent, comprehensive framework and practical guidance for investigating train aerodynamic characteristics and ensuring operational safety.

高速铁路系统具有巨大的容量、效率和可靠性，但随着运行速度的提高，其对侧风效应的敏感性也在增加。本研究采用映射知识域（mapping knowledge domain， MKD）方法，综合分析了1981 - 2025年发表在《科学引文索引扩展版》（SCIE）和《社会科学引文索引》（SSCI）上的论文，对侧风环境下列车气动性能和运行安全研究的发展趋势进行了分析。利用知识图谱工具VOSviewer和Sci2 Tool，得出以下主要结论：(1)1981 - 2009年，中国在该领域，特别是在工程应用领域的论文发表量呈现出逐渐增长的趋势，此后显著增长，中国已成为该领域研究的主要贡献者；(2)作者身份、机构和国际合作的多维网络分析揭示了全球顶尖大学和研究团队之间的合作联系；(3)利用文献共被引和关键词共现分析对子领域进行划分，并综合各子领域的前沿进展；(4)突发检测分析揭示了“风障”和“动力响应”等新兴研究趋势，这些研究可能成为未来保障列车在侧风条件下稳定安全运行的重点研究领域。该综述为研究列车气动特性和确保运行安全提供了连贯、全面的框架和实践指导。

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引用次数: 0

Air pollutant concentration fluctuations in an industrial site: A wind tunnel study 工业场所空气污染物浓度波动：风洞研究

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-03-01 Epub Date: 2026-01-10 DOI: 10.1016/j.jweia.2026.106339

Claudia Schiavini , Massimo Marro , Marco Ravina , Deborah Panepinto , Mariachiara Zanetti , Lionel Soulhac , Pietro Salizzoni

The accidental release of hazardous airborne pollutants on industrial sites creates risks associated with the exceedance of toxicity or explosivity limits. Capturing these risks requires predicting higher-order statistics of concentration fluctuations at various distances from the source. This challenge, already complex in atmospheric boundary layers, is further complicated by the typical built environment of industrial sites. To address this, we conducted wind-tunnel experiments on the dispersion of a passive scalar from a localized ground-level source within a reduced-scale model of an industrial site. The experiments measured the velocity and concentration fields, while varying the geometry of an upstream building simulating typical complex industrial structures.

A key focus of our investigation is the one-point passive scalar concentration PDF, whose experimental realizations were systematically compared to three analytical models: the gamma, two-parameter Weibull and lognormal distributions. The gamma distribution generally provides the best predictions, although the lognormal model performs better within the building wake near the source. While the main discrepancies between theoretical distributions and experimental data consistently occur at low concentration values, all three distributions accurately predict the 95th and 99th concentration percentiles. Thus, peak and hazardous concentration levels can be reliably estimated even without fully capturing the complete concentration distribution.

工业场所有害空气污染物的意外释放产生了与超过毒性或爆炸性限制有关的风险。捕捉这些风险需要预测离源不同距离的浓度波动的高阶统计数据。这一挑战在大气边界层中已经很复杂了，而工业场地的典型建筑环境又使其变得更加复杂。为了解决这个问题，我们在一个工业场地的缩小模型中，对来自局部地面源的被动标量的色散进行了风洞实验。实验测量了速度场和浓度场，同时改变了上游建筑的几何形状，模拟了典型的复杂工业结构。我们研究的一个重点是单点被动标量浓度PDF，其实验实现与三种分析模型：伽玛分布、双参数威布尔分布和对数正态分布进行了系统的比较。伽玛分布通常提供最好的预测，尽管对数正态模型在靠近源的建筑物尾流中表现更好。虽然理论分布与实验数据之间的主要差异始终发生在低浓度值，但所有三个分布都准确地预测了第95和第99个浓度百分位数。因此，即使没有完全捕获完整的浓度分布，也可以可靠地估计峰值和危险浓度水平。

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引用次数: 0

Analysis of uncertainties in the fatigue damage of low-rise building envelopes under non-Gaussian wind pressures based on the Tovo-Benasciutti method with different translation functions 基于不同平移函数的Tovo-Benasciutti方法的非高斯风压下低层建筑围护结构疲劳损伤不确定性分析

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-03-01 Epub Date: 2026-01-12 DOI: 10.1016/j.jweia.2026.106336

Fengbo Wu , Na Wang , Yan Jiang , Shaopeng Li , Liuliu Peng , Ao Mei

Given costly wind tunnel tests and time-consuming simulations, limited wind pressure time histories on low-rise building envelopes lead to uncertainty in fatigue estimation. Currently, the Tovo-Benasciutti method (denoted as TB method) (Benasciutti and Tovo, 2005a) combined with the translation functions which are commonly represented by cumulative distribution function (CDF) mapping (TB-CDF), Hermite polynomial model (TB-HPM), Johnson transformation model (TB-JTM), and Piecewise HPM (TB-PHPM), is widely used in fatigue damage calculation. However, their performance differences and uncertainties of estimated fatigue damage remain unclear. Therefore, based on wind tunnel test data, this paper compares the fatigue estimation performance and analyzes the relationship between key parameters such as time duration and fatigue damage uncertainties of these models, and proposes semi-empirical analytical formulas for estimating the mean and uncertainty of fatigue damage. Results show that TB-CDF provides the highest accuracy in fatigue estimation, followed by TB-PHPM, with TB-HPM being the worst. TB-CDF yields the smallest uncertainty in fatigue estimation, followed by TB-JTM, while TB-PHPM has the largest. With the increase of time duration, uncertainty of fatigue decreases and tends to stabilize, and it is positively correlated with the uncertainty of most parameters except for a few parameters. The developed formulas have satisfactory estimation accuracy.

由于风洞试验成本高、模拟时间长，低层建筑围护结构有限的风压时程导致了疲劳估计的不确定性。目前，Tovo-Benasciutti方法（简称TB方法）（Benasciutti and Tovo, 2005a）与通常以累积分布函数（CDF）映射（TB-CDF）、Hermite多项式模型（TB-HPM）、Johnson变换模型（TB- jtm）和分段HPM （TB- phpm）为代表的平移函数相结合，被广泛应用于疲劳损伤计算中。然而，它们的性能差异和估计疲劳损伤的不确定性仍然不清楚。因此，本文基于风洞试验数据，比较了几种模型的疲劳估计性能，分析了时间等关键参数与疲劳损伤不确定性之间的关系，提出了估计疲劳损伤均值和不确定性的半经验分析公式。结果表明，TB-CDF的疲劳估计精度最高，其次是TB-PHPM， TB-HPM的疲劳估计精度最差。TB-CDF在疲劳估计中的不确定性最小，其次是TB-JTM，而TB-PHPM的不确定性最大。随着时间的增加，疲劳的不确定性减小并趋于稳定，除少数参数外，与大部分参数的不确定性呈正相关。所建立的公式具有满意的估计精度。

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引用次数: 0

Aerodynamic characteristics and POD analysis of the long-span bridge under non-uniform flows 非均匀流作用下大跨度桥梁气动特性及POD分析

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-03-01 Epub Date: 2026-01-14 DOI: 10.1016/j.jweia.2026.106354

Siwen Sun , Wen-Li Chen , Donglai Gao , Hui Li

The present study investigates the three-dimensional aerodynamic characteristics under non-uniform inflow through wind tunnel tests in comparison with uniform flow. A 4-m-long test model was employed, with ten cross-sectional pressure-measuring planes. The study examines the spanwise distribution of surface pressure and aerodynamic force coefficients, as well as their frequency characteristics. The relationship between wake frequencies, aerodynamic force frequencies, and trailing-edge surface pressure frequencies was analyzed. Proper Orthogonal Decomposition (POD) was applied to the time-frequency analysis results of the wake field. The absolute values of POD modes represent the extracted wake frequency components. Both POD and time-frequency analysis quantitatively characterize the spatial non-uniformity, spectral complexity, and temporal variability of wake frequencies under non-uniform flow. The results indicate that non-uniform wind velocities have a small impact on the mean pressure coefficients but a significant effect on the fluctuating pressure coefficients and aerodynamic force fluctuation coefficients. Larger wind velocity differences in non-uniform profiles lead to more pronounced spanwise non-uniformity in fluctuating pressure coefficients, mean lift coefficients, and POD modal energy distributions. The spanwise distribution of surface pressure frequencies at the trailing edge, high-frequency regions of aerodynamic forces, and wake frequencies is aligned with the trend of the inflow velocity profile.

通过风洞试验，研究了非均匀进流条件下的三维气动特性，并与均匀进流条件进行了比较。试验模型长4m，有10个截面测压面。研究了表面压力和气动力系数的展向分布，以及它们的频率特性。分析了尾迹频率、气动力频率和尾缘表面压力频率之间的关系。对尾流场的时频分析结果进行了适当的正交分解（POD）。POD模态的绝对值表示提取的尾迹频率分量。POD和时频分析定量表征了非均匀流条件下尾迹频率的空间非均匀性、频谱复杂性和时间变异性。结果表明，非均匀风速对平均压力系数的影响较小，但对脉动压力系数和气动力脉动系数的影响较大。在非均匀剖面中，较大的风速差导致波动压力系数、平均升力系数和POD模态能量分布的展向非均匀性更加明显。尾缘表面压力频率、气动力高频区和尾迹频率的展向分布与流入速度剖面的趋势一致。

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引用次数: 0

Large Eddy Simulation of self-excited forces in forced-vibration square prisms: Lock-In regime dynamics and vortex shedding modulation 强制振动方棱镜中自激力的大涡模拟：锁定状态动力学和旋涡脱落调制

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-03-01 Epub Date: 2026-01-10 DOI: 10.1016/j.jweia.2026.106338

Qingshan Yang , Wenxiang Teng , Kunpeng Guo , Tengfei Wang , Ling Zhao , Yi Hui , Min Liu

This study employs Large Eddy Simulation (LES) with dynamic mesh techniques to investigate fluid-structure interaction (FSI) mechanisms in a forced-vibration square prism under across-wind excitation. To effectively validate the reliability of the numerical simulation results, this study adopts model parameters consistent with the wind tunnel tests conducted by Steckley (1989). Accordingly, the numerical model was benchmarked against this dataset and demonstrated good agreement for both the base bending moment coefficients under stationary case and the aerodynamic damping/stiffness parameters under forced vibration cases. Key findings reveal distinct regimes governed by reduced velocity: within the lock-in regime, forced vibration induces frequency synchronization between vortex shedding and structural motion, generating secondary spectral peaks in base moment coefficients. Coherence analysis demonstrates strong vibration-aerodynamic coupling concentrated in the upper prism region, driven by amplified Kármán vortex development under motion-induced energy injection. Transient flow analysis identifies two competing three-dimensional (3D) vortex mechanisms: horizontal vortex street dominance during high-amplitude fluctuations and tip-conical vortex suppression under forced vibration. Beyond lock-in wind speed, aerodynamic spectra revert to static characteristics. The present study establishes a predictive framework for motion-induced aerodynamic forces in tower structures, resolving critical nonlinearities in vortex-induced vibration through quantified energy transfer pathways. Practical implications include refined aerodynamic damping models and spanwise coherence criteria for wind-resistant design of tower-like structures.

本研究采用大涡模拟（LES）和动态网格技术研究了横风激励下强制振动方形棱镜内的流固耦合机制。为了有效验证数值模拟结果的可靠性，本研究采用与Steckley（1989）风洞试验一致的模型参数。因此，数值模型与该数据集进行了基准测试，结果表明，静态情况下的基础弯矩系数与强迫振动情况下的气动阻尼/刚度参数都具有良好的一致性。关键发现揭示了由速度降低控制的不同机制：在锁定机制中，强迫振动诱导涡旋脱落和结构运动之间的频率同步，在基矩系数中产生二次谱峰。相干分析表明，在运动诱导能量注入下，由放大的Kármán涡旋发展驱动的强振动-气动耦合集中在上棱镜区域。瞬态流动分析确定了两种相互竞争的三维涡旋机制：高振幅波动时的水平涡旋街优势和强迫振动下的尖锥涡抑制。在锁定风速之外，空气动力学谱恢复到静态特征。本研究建立了塔结构中运动诱导气动力的预测框架，通过量化的能量传递路径解决了涡激振动中的临界非线性问题。实际意义包括改进的气动阻尼模型和跨向相干准则，用于塔状结构的抗风设计。

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引用次数: 0

Extrema estimation of vehicle-bridge interaction responses under crosswind via probabilistic decoupling 基于概率解耦的侧风作用下车桥相互作用响应极值估计

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-03-01 Epub Date: 2026-01-20 DOI: 10.1016/j.jweia.2026.106353

Haoyuan Yang , Zhibin Jin , Ke Chen , Yongle Li

This study proposes a novel probabilistic method for estimating the extrema of the vehicle-bridge system subjected to crosswind and track irregularities, with a focus on key safety indexes such as wheel unloading ratio and derailment coefficient. The low-frequency components of crosswind induce significant variability in the vehicle's response during its short passage over the bridge. To address this, a probabilistic decoupling framework is introduced, in which the total system response is approximated as the sum of an intermediate response, due to crosswind alone, and a stationary Gaussian increment process, arising from track irregularities and coupling effects. A moving average filtering technique is employed to achieve this decomposition. An extreme value estimation formula is developed based on decomposition and upcrossing rate theory, and it is validated through numerical simulations. The method shows good accuracy and low bias using only tens of samples, outperforming conventional approaches. Finally, the proposed method is applied to evaluate the safe operating speed of high-speed vehicles under a mean wind velocity of 30 m/s. Results indicate that the wheel unloading ratio is the dominant safety index, and safe operation can be ensured at speeds up to 200 km/h.

本文提出了一种新的概率方法来估计受侧风和轨道不平整影响的车桥系统的极值，重点关注车轮卸载比和脱轨系数等关键安全指标。侧风的低频分量在车辆通过桥梁的短时间内引起车辆响应的显著变化。为了解决这个问题，引入了一个概率解耦框架，其中系统总响应近似为仅由侧风引起的中间响应和由轨道不规则性和耦合效应引起的平稳高斯增量过程的总和。采用移动平均滤波技术来实现这种分解。基于分解和上交叉速率理论，建立了极值估计公式，并通过数值模拟进行了验证。该方法仅使用数十个样本，具有良好的准确性和低偏差，优于传统的方法。最后，将该方法应用于平均风速为30 m/s时高速车辆的安全运行速度评估。结果表明，车轮卸荷率是主导安全指标，在200 km/h的速度下可以保证安全运行。

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