Journal of Wind Engineering and Industrial Aerodynamics最新文献

Wind tunnel investigation of high-rise building aerodynamics under typhoon wind profiles featuring low-level jets 以低空射流为特征的台风风廓线下高层建筑空气动力学风洞研究

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-02-03 DOI: 10.1016/j.jweia.2026.106366

Xigui Huang , Gang Hu , Jingliang Gong , Chulong Yuan , Chao Li , Zenghao Huang , Lixiao Li

Low-Level Jets (LLJs)—rapid increases in wind speed at heights of 40∼100m commonly observed in typhoon eyewall regions—cause complex spatial variations in boundary-layer wind profiles and significantly influence the aerodynamics of tall buildings. A comprehensive evaluation of these effects is essential for the wind-resistant design of high-rise structures in typhoon-prone regions. A multi-blade device was developed to reproduce typhoon wind profiles featuring LLJs within a conventional boundary-layer wind tunnel. Wind pressure tests were conducted on a 1:200 scaled CAARC model to compare the aerodynamic effects of typhoon wind profiles (TWP) with synoptic wind profiles (SWP). The analysis covers mean and fluctuating pressure coefficients, local force coefficients, base moment coefficients, and force coefficients power spectral densities. Proper Orthogonal Decomposition (POD) was employed to identify dominant wind pressure patterns and quantify energy contributions. Results show that LLJ markedly modify surface pressure distributions and vortex shedding behavior. Under TWP, the maximum drag coefficient reached 1.427, exceeding the SWP value of 1.244 and the Chinese code limit of 1.4. POD analysis reveals that TWP alters vortex formation, suppresses vortex shedding, and reduces crosswind loads relative to SWP. These findings provide valuable insight for wind-resistant design and performance assessment of high-rise buildings in typhoon-prone aeras.

低层急流（LLJs）——通常在台风眼壁区域观测到的40 ~ 100m高度风速的快速增加——导致边界层风廓线的复杂空间变化，并显著影响高层建筑的空气动力学。综合评价这些影响对台风多发地区高层结构的抗风设计至关重要。在传统的边界层风洞中，研制了一种多叶片装置来重现具有llj特征的台风风廓线。为比较台风风廓线（TWP）与天气风廓线（SWP）对空气动力的影响，在1:200比例CAARC模型上进行了风压试验。分析包括平均和波动压力系数、局部力系数、基本力矩系数和力系数功率谱密度。采用适当的正交分解（POD）来确定优势风压模式并量化能量贡献。结果表明，LLJ明显改变了表面压力分布和旋涡脱落行为。在TWP下，最大阻力系数达到1.427，超过了SWP值1.244和中国规范限值1.4。POD分析表明，相对于SWP， TWP改变了涡的形成，抑制了涡的脱落，减少了侧风载荷。这些研究结果为台风多发地区高层建筑的抗风设计和性能评估提供了有价值的见解。

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引用次数: 0

Calibration of synthetic inflow turbulence and its effects on the wind loads on a tall building 综合入流湍流校正及其对高层建筑风荷载的影响

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-01-29 DOI: 10.1016/j.jweia.2026.106362

Jack K. Wong, Oya Mercan, Paul J. Kushner

When applying large eddy simulation (LES) for wind-load assessment, simulating inflow turbulence characteristics in the atmospheric boundary layer (ABL) is crucial for achieving accurate results. Advances in divergence-free synthetic turbulence generators for ABL conditions have made LES more computationally affordable. However, empty-domain tests reveal systematic deviations between the synthetic turbulence and the prescribed profiles that can impact downstream loads. This study introduces a gradient-based iterative calibration workflow that simultaneously adjusts the mean velocity, turbulence intensities and integral length scales to reduce such discrepancies. Unlike approaches that calibrate individual components, the proposed method accounts for the interactions of turbulence quantities and corrects discrepancies caused by divergence-free and mass-flux corrections and turbulence dissipation, leading to more control over the incident flow. The method is applied to a tall-building case from the Tokyo Polytechnic University aerodynamic database for wind angles 0° and 45°. By calibrating the inflow at different locations, the effects of correctors and convection are quantified. For both wind angles, the effect of calibration is most pronounced on the windward pressure and drag coefficients. It substantially reduces the coefficient of variation of root-mean-square error (CVRMSE) of the standard deviation (STD) of windward pressure coefficients (e.g. 8 % to 1 % at 0°and 17 % to 1 % at 45°) and improves drag moment predictions. At 0°, the percentage error in the STD of drag moment coefficient changes from −26 % to +4 % and to −6 % for the respective calibrations. At 45°, the change is from −26 % to +19 % and −3 %, respectively.

在应用大涡模拟（LES）进行风荷载评估时，模拟大气边界层（ABL）入流湍流特征是获得准确结果的关键。ABL条件下无散度合成湍流发生器的进步使得LES在计算上更加实惠。然而，空域测试揭示了合成湍流与规定剖面之间的系统性偏差，这些偏差可能影响下游负载。本研究引入了一种基于梯度的迭代校准工作流程，可以同时调整平均速度、湍流强度和积分长度尺度，以减少这种差异。与校准单个分量的方法不同，所提出的方法考虑了湍流量的相互作用，并校正了由无散度和质量通量校正以及湍流耗散引起的差异，从而更好地控制入射流。该方法应用于东京工业大学空气动力学数据库中的高层建筑案例，风角为0°和45°。通过标定不同位置的入流，量化了校正器和对流的影响。对于两个风角，校正对迎风压力和阻力系数的影响最为显著。它大大降低了迎风压力系数标准偏差（STD）的均方根误差（CVRMSE）变异系数（例如，0°时为8%至1%，45°时为17%至1%），并改善了阻力矩预测。在0°时，相应校准的阻力力矩系数在STD中的百分比误差从- 26%变化到+ 4%和- 6%。在45°时，变化分别从- 26%到+ 19%和- 3%。

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引用次数: 0

Adaptive modal pushover analysis for efficient buffeting performance evaluation of long-span bridge decks 大跨度桥面有效抖振性能评价的自适应模态推覆分析

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-01-27 DOI: 10.1016/j.jweia.2026.106363

Ruiqing Han , Teng Wu

The long-span bridge decks are susceptible to wind-induced vibrations due to their high flexibility and low damping. Considering the potential material savings by allowing the nonlinearity in structural elements under strong winds, the study is motivated by the recent performance-based wind design methodology to evaluate and understand the inelastic behaviors of long-span bridge decks at multiple buffeting performance levels. While the nonlinear time history analysis can offer very detailed wind structural response information, the required volume of computations is significant due to the long duration of windstorms. Hence, the static nonlinear analyses at multi-level wind hazards (i.e., wind buffeting pushover analysis) are explored in this study to efficiently provide adequate information on wind demands of the bridge deck and its components. To this end, the conventional equivalent static wind loads (ESWLs) for the linear elastic buffeting analysis is extended into the nonlinear inelastic regime, with the consideration of higher structural modes, inelastic behaviors, and multi-location responses. Inspired by the modal pushover analysis procedure for seismic demand evaluation and load-response-correlation method for wind load distribution estimation, the peak displacements at multiple bridge deck locations considering contributions from multiple modes and their coupling effects are first obtained using the pseudo-excitation method, and then the ESWLs are acquired using the displacement influence line. Furthermore, the structural characteristics (e.g., modal properties and displacement influence lines) are updated at each step of the pushover analysis to consider the effects of bridge deck inelastic behaviors on the ESWLs. A long-span truss bridge deck is employed as the case study to demonstrate the high accuracy and efficiency of the developed adaptive modal pushover analysis (AMPA) procedure for buffeting performance evaluation. Based on the inelastic behavior evolution of bridge deck elements with the increase of wind intensity, four buffeting performance levels are identified on the capacity curve. Finally, the sensitivity analysis is conducted to examine the contributions of multiple-mode and inelastic considerations to the wind demands estimated with AMPA.

大跨径桥面由于具有高柔韧性和低阻尼，易受风致振动的影响。考虑到允许结构元件在强风下非线性可能节省的材料，这项研究的动机是最近基于性能的风设计方法，以评估和理解大跨度桥面在多个抖振性能水平下的非弹性行为。虽然非线性时程分析可以提供非常详细的风结构响应信息，但由于风暴持续时间长，所需的计算量很大。因此，为了有效地提供桥面及其构件的风需求信息，本研究将探索多层次风危害下的静力非线性分析（即风抖推覆分析）。为此，将用于线性弹性抖振分析的传统等效静风荷载（eswl）扩展到非线性非弹性状态，同时考虑了更高的结构模态、非弹性行为和多位置响应。受地震需求评估的模态推覆分析程序和风荷载分布估计的荷载-响应-相关方法的启发，首先采用拟激励法获得考虑多模态贡献及其耦合效应的多个桥面位置的峰值位移，然后利用位移影响线获得ESWLs。此外，在推覆分析的每一步更新结构特征（如模态特性和位移影响线），以考虑桥面非弹性行为对eswl的影响。以某大跨度桁架桥面为例，验证了所开发的自适应模态推覆分析（AMPA）方法对桥面抖振性能评价的准确性和有效性。根据桥面单元的非弹性性能随风强的变化规律，在容量曲线上划分了4个抖振性能等级。最后，进行了敏感性分析，考察了多模态和非弹性因素对AMPA估计的风需求的贡献。

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引用次数: 0

CFD analysis of exhaust flow for reducing soot stains on railcar body surfaces 减少轨道车辆车体表面烟尘的排气流CFD分析

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-01-26 DOI: 10.1016/j.jweia.2026.106359

Natsuki Harada, Yuhei Noguchi, Yuto Araki, Tokuzo Miyachi

Diesel railcars are widely used in rail transport, particularly in rural areas, because of their ability to operate without overhead power lines. However, the exhaust gas emitted by diesel railcars can cause soot stains on the car body surface, which requires regular cleaning. In this study, computational fluid dynamics (CFD) simulations were conducted to investigate the effects of roof equipment and exhaust pipe configurations on the exhaust flow around a car body. Unsteady flow analysis was performed using delayed detached eddy simulation. The exhaust flow from the exhaust pipe was simulated using a non-isothermal flow based on the Boussinesq approximation. The velocity profiles obtained by CFD were validated against wind tunnel test results. The CFD results showed that the exhaust gas emitted into a cavity consisting of roof equipment caused soot staining on the car body surface. This study proposes an appropriate location for the exhaust outlet, in which the flow velocity normalised to the train speed was higher than 0.7 to reduce soot stains on the surface.

柴油轨道车广泛用于铁路运输，特别是在农村地区，因为它们能够在没有架空电线的情况下运行。但是，柴油轨道车排放的废气会在车体表面造成油烟污渍，需要定期清洗。本文通过计算流体力学（CFD）模拟研究了车顶设备和排气管结构对车身周围排气流的影响。采用延迟分离涡流模拟进行非定常流场分析。采用基于Boussinesq近似的非等温流动模拟了排气管道的排气流。并与风洞试验结果进行了对比验证。计算流体力学结果表明，废气进入由车顶设备组成的空腔后，会在车身表面产生烟尘染色。本研究提出了一个合适的排气口位置，其流速归一化到列车速度高于0.7，以减少表面的煤烟污渍。

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引用次数: 0

Effects of reentrant corners on wind loads for non-rectangular-plan buildings 可入角对非矩形平面建筑风荷载的影响

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-01-26 DOI: 10.1016/j.jweia.2026.106360

Jessica J. van den Heuvel , Gregory A. Kopp

Although irregular plan shapes are common in modern construction, wind load provisions for low-rise buildings continue to treat simple rectangular buildings as the default case and offer little explicit guidance for irregular geometries. ASCE 7–22 suggests that standard rectangular-based wind load provisions conservatively envelope most irregular structures, though this assumption remains largely unvalidated for low-rise structures. This study presents wind tunnel results for a range of irregular building models tested under multiple wind directions, terrains, and geometries. Each configuration is compared directly to its equivalent rectangular footprint. Contrary to the prevailing assumptions, the results show that irregular shapes with reentrant corners can produce higher base shear and uplift loads than their rectangular counterparts. The increase in base shear is primarily driven by how reentrant corners shorten the effective distance between windward and leeward faces, leading to higher suction pressures on the leeward wall. Increased uplift is attributed to three main aerodynamic mechanisms: area effects, where similar pressures act over relatively larger portions of the roof on irregular shapes; windward wall effects, where recessed roof edges experience suction more akin to fully exposed windward edges; and corner effects, where the geometry produces multiple zones of high suction without increasing the peak value but resulting in greater overall uplift. These findings highlight the need for improved guidance on wind loading for irregular low-rise buildings with reentrant corners.

尽管不规则的平面形状在现代建筑中很常见，但低层建筑的风荷载规定仍然将简单的矩形建筑视为默认情况，并且对不规则的几何形状没有提供明确的指导。ASCE 7-22表明，标准的基于矩形的风荷载规定保守地包住了大多数不规则结构，尽管这种假设在很大程度上仍未得到低层结构的验证。本研究展示了一系列不规则建筑模型在多种风向、地形和几何形状下测试的风洞结果。每个配置都直接与其等效的矩形占用空间进行比较。与普遍的假设相反，结果表明，具有可入角的不规则形状比矩形形状产生更高的基底剪切和隆起荷载。基底剪切的增加主要是由于入角缩短了迎风面和背风面之间的有效距离，从而导致背风壁面的吸力压力增加。凸起的增加归因于三个主要的空气动力学机制：面积效应，在不规则形状的屋顶上，类似的压力作用于相对较大的部分；迎风墙的影响，其中凹陷的屋顶边缘经历吸力更类似于完全暴露的迎风边缘；角效应，几何形状产生了多个高吸力区域，没有增加峰值，但导致了更大的整体隆起。这些发现强调了对具有可进入角的不规则低层建筑改进风荷载指导的必要性。

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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 : 2026-01-23 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 : 2026-01-23 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

Rapid prediction of the spatiotemporal distribution of facade wind-driven rain using ANN and symbolic regression 基于人工神经网络和符号回归的立面风雨时空分布快速预测

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-01-21 DOI: 10.1016/j.jweia.2026.106361

Hui Yu, Huibo Zhang

Accurate quantification of the spatiotemporal distribution of wind-driven rain (WDR) on building facades is critical yet restricted by the high computational cost of numerical simulations and the limited precision of semi-empirical methods. To address this, this study aims to develop a rapid and accurate machine learning framework for predicting facade-level WDR spatiotemporal distribution. A quantitative approach was employed where a comprehensive dataset, covering diverse meteorological conditions and building configurations, was generated through numerical simulations to train an artificial neural network (ANN) model. Additionally, a surface roughness correction model was derived using symbolic regression. Results indicate that inlet wind speed and vertical position strongly influence WDR intensity. The ANN model achieved excellent accuracy (R² = 0.9998) and generalization (R² ≥ 0.996), with a computational speedup of over 4700 times compared to CFD simulations. The correction model effectively captured roughness effects (R² = 0.96). The framework's robustness and scalability were validated through a case study of a heritage building, demonstrating its utility in providing reliable boundary conditions for hygrothermal and durability analyses to support resilient building design.

准确量化建筑立面上的风雨时空分布至关重要，但受数值模拟计算成本高和半经验方法精度有限的限制。为了解决这一问题，本研究旨在开发一个快速准确的机器学习框架，用于预测立面水平WDR的时空分布。采用定量方法，通过数值模拟生成涵盖不同气象条件和建筑配置的综合数据集，以训练人工神经网络（ANN）模型。此外，采用符号回归方法推导了表面粗糙度校正模型。结果表明，入口风速和垂直位置对WDR强度影响较大。该模型具有较好的精度（R2 = 0.9998）和泛化（R2≥0.996），计算速度比CFD模拟提高4700倍以上。校正模型有效捕获粗糙度效应（R2 = 0.96）。该框架的稳健性和可扩展性通过一个遗产建筑的案例研究得到验证，证明了它在为湿热和耐久性分析提供可靠的边界条件以支持弹性建筑设计方面的实用性。

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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 : 2026-01-20 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

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 : 2026-01-20 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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引用次数: 0