Journal of Wind Engineering and Industrial Aerodynamics最新文献_第2页

An aerodynamic measurement system to improve the efficiency of wind turbine rotor blades 一种提高风力机转子叶片效率的气动测量系统

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-02-04 DOI: 10.1016/j.jweia.2026.106368

Julien Deparday , Yuriy Marykovskiy , Imad Abdallah , Sarah Barber

The wind energy sector is growing rapidly with the installation of wind turbines with long, slender blades in diverse sites. To enhance operational performance under specific wind conditions and validate the aerodynamic design of flexible blades, comprehensive field aerodynamic data is crucial. However, published field measurements are scarce for large-scale rotor blades due to complex and costly installation of the requisite measurement systems. In recent work, we developed a wireless and self-sufficient aerodynamic measurement system, named Aerosense, which is less complex and costly than conventional aerodynamic measurement systems. The system uses sensors to obtain local aerodynamic pressures, blade motions, and inflow conditions. In this paper, we demonstrate the value of Aerosense in understanding the aerodynamic behaviour of rotor blades, using a 74W wind turbine operating in the field. After a thorough calibration and correction process, we demonstrate, for example, that the pressure distribution can vary significantly during one rotation of the blade, even under stable wind conditions. These variations are found to be due to the misalignment of the wind direction with the wind turbine’s rotational axis. We therefore conclude that the developed measurement system is valuable for understanding aerodynamic loading on rotor blades as well as the influence of the inflow conditions on wind turbine performance. This measurement system is applicable to other wind engineering challenges requiring distributed pressure measurements on large or flexible structures, such as bridges, cables, and building façades.

随着在不同地点安装长而细长叶片的风力涡轮机，风能部门正在迅速发展。为了提高柔性叶片在特定风力条件下的工作性能，验证柔性叶片的气动设计，综合的现场气动数据至关重要。然而，由于必要的测量系统的复杂和昂贵的安装，公开的大型转子叶片的现场测量很少。在最近的工作中，我们开发了一种无线和自给自足的空气动力学测量系统，称为Aerosense，它比传统的空气动力学测量系统更简单，成本更低。该系统使用传感器获取局部气动压力、叶片运动和流入情况。在本文中，我们展示了Aerosense在理解转子叶片空气动力学行为方面的价值，使用74W风力涡轮机在现场运行。经过彻底的校准和校正过程，我们证明，例如，即使在稳定的风力条件下，在叶片的一次旋转期间，压力分布也会发生显着变化。这些变化被发现是由于风向与风力涡轮机的旋转轴不对准。因此，我们得出结论，开发的测量系统对于了解转子叶片的气动载荷以及入流条件对风力机性能的影响是有价值的。该测量系统适用于其他需要对大型或柔性结构（如桥梁、电缆和建筑立面）进行分布式压力测量的风力工程挑战。

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引用次数: 0

Design trade-offs in building porosity: A parametric analysis of vertical placement and geometry for urban ventilation 建筑孔隙度的设计权衡：垂直位置和城市通风几何的参数化分析

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-02-04 DOI: 10.1016/j.jweia.2026.106369

Subin Lin , Jason Leong , Hee Joo Poh

This study investigates the critical influence of building porosity’s vertical placement and geometric configuration on street canyon airflow. While porosity is increasingly advocated for urban ventilation, a systematic understanding of how these design parameters affect performance is lacking. The purpose of this research is to decouple these effects through a parametric computational fluid dynamics (CFD) study. A Reynolds-Averaged Navier–Stokes (RANS) model, validated against experimental data, was used to analyze a series of idealized building configurations. Two sets of simulations were conducted. The first compared identical porous openings placed at six different vertical levels, from the ground floor upwards. The second investigated various opening geometries at a fixed mid-building level. Principal results reveal a stark difference in performance based on vertical position. Ground-level porosity was found to be most effective for preserving robust pedestrian-level wind flow. In contrast, mid- and upper-level porosity consistently degraded near-ground conditions relative to the ground-level case, with some configurations causing significant velocity deficits. Furthermore, for a fixed vertical level, the specific geometry of the opening was also shown to be a highly sensitive parameter. The major conclusion is that the vertical location of porosity is the primary determinant of pedestrian-level ventilation. A “one-size-fits-all” approach to porosity design is ineffective; the optimal solution is highly dependent on the targeted ventilation objective (e.g., pedestrian comfort vs. upper-level air exchange).

本文研究了建筑孔隙度的垂直位置和几何形态对街道峡谷气流的关键影响。虽然孔隙率越来越多地被提倡用于城市通风，但缺乏对这些设计参数如何影响性能的系统理解。本研究的目的是通过参数计算流体动力学（CFD）研究来解耦这些影响。基于实验数据验证的reynolds - average Navier-Stokes （RANS）模型被用于分析一系列理想的建筑结构。进行了两组模拟。第一个比较了相同的多孔开口放置在六个不同的垂直水平，从地面向上。第二个项目研究了固定建筑中层的各种开口几何形状。主要结果显示，基于垂直位置的性能存在明显差异。研究发现，地面孔隙度对于保持强劲的行人水平风流最有效。相比之下，相对于地面情况，中上层孔隙度在近地面条件下持续退化，其中一些配置导致明显的速度缺陷。此外，对于固定的垂直水平，开口的特定几何形状也被证明是一个高度敏感的参数。主要结论是孔隙度的垂直位置是行人通风的主要决定因素。“一刀切”的孔隙度设计方法是无效的；最佳解决方案高度依赖于目标通风目标（例如，行人舒适度与高层空气交换）。

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引用次数: 0

CFD assessment of wind energy potential: A combined framework of urban morphology and design modification of high-rise buildings with voids 风能潜力的CFD评估：城市形态与高层建筑空隙设计修改的结合框架

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-02-04 DOI: 10.1016/j.jweia.2026.106367

An-Shik Yang , Yuan-Lung Lo , Zhengtong Li , Yang Li , Chih-Yung Wen , Jun-Yu Jiang , Yee-Ting Lee

The pursuit of urban energy sustainability launches increasing efforts to revolutionize the global energy sector from the fossil-based sources to a zero-carbon system. This study aims to propose a combined framework of urban morphology and building design modification with voids to realize urban wind energy yield. Experimentally, the streamwise mean velocities and turbulence intensities in the building models are measured by a boundary layer wind tunnel to validate the computational model. The performance-oriented analyses by the computational fluid dynamics (CFD) simulations are conducted to explore the effects of urban morphologies (i.e., plan area density (λ_p), staggered displacement (S)) and void-integrated building layouts on the outcomes of urban wind energy. The indicators of normalized wind power density (PD/PD_ref) and reference turbulence intensity (I_ref) are then employed to appraise the utilization of urban wind power. Considering a medium wind energy potential of PD ≥ 100 W/m² (i.e., PD/PD_ref ≥ 0.33) having the technical feasibility of development merits, the CFD results suggest the most favorable arrangements of λ_p = 0.33, S = 0.22B and the semi-open void design, generating the PD/PD_ref values of 0.46, 0.62, 0.33 on the roofs, beside the buildings and over the void channels, all within the acceptable average I_ref limit of 0.16 in the void building array.

对城市能源可持续性的追求推动了全球能源行业从化石能源到零碳系统的革命。本研究旨在提出一个结合城市形态和建筑设计改造与空间的框架，以实现城市风能发电。实验上，利用边界层风洞测量了建筑物模型的流向平均速度和湍流强度，验证了计算模型的正确性。通过计算流体动力学（CFD）模拟，以性能为导向，探讨城市形态（即规划面积密度（λp）、交错位移(S)）和空隙集成建筑布局对城市风能效果的影响。采用归一化风电密度（PD/PDref）指标和参考湍流强度（Iref）指标对城市风电利用进行评价。考虑到中等风能潜力PD≥100 W/m2（即PD/PDref≥0.33）具有开发的技术可行性优点，CFD结果表明，λp = 0.33、S = 0.22B和半开放式孔洞设计的最优布置，在孔洞建筑阵列中，屋顶、建筑物旁和孔洞通道上方的PD/PDref值分别为0.46、0.62和0.33，均在可接受的平均Iref值0.16范围内。

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引用次数: 0

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

Seasonal variability of wind characteristics in mountainous deep-canyon terrain based on field measurements 基于野外测量的山地深峡谷地形风特征的季节变化

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.2026.106364

Xinghui Kang , Yunfeng Zou , Yingjie Gao , Dianyi Guo , Xuhui He , Haizhu Xiao

Wind-resistant design of mountainous infrastructure is critically constrained by incomplete characterization of complex, site-specific wind fields. Given limited research, a comprehensive field measurement campaign was conducted at a deep-canyon bridge site to systematically investigate wind characteristics, focusing on their seasonal variability, probability distributions, and parameter interdependencies. The results reveal pronounced seasonal variations in key wind parameters, with the highest wind speeds observed in spring and the strongest wind directionality recorded in summer. Notably, the mean wind speed and turbulence parameters are all consistently well-described by lognormal distributions across seasons. Meanwhile, turbulence parameters are markedly dependent on mean wind speed. Further analysis indicates the dominant role of topography in modulating the canyon wind field. The prevailing wind direction is consistently stable year-round, and the wind attack angle follows a terrain-dependent function of the incoming wind direction. A simplified three-parameter spectral model was subsequently developed. This model accurately reconstructs the measured power spectral density across all seasons, and its universal applicability was successfully validated via a defined spectral logarithmic deviation index. This study establishes a crucial theoretical and empirical basis for determining wind loads and assessing structural safety in similar complex topography.

山区基础设施的抗风设计受到复杂、场地特定风场特征不完整的严重制约。考虑到研究的局限性，我们在一个深峡谷大桥现场进行了全面的实地测量活动，系统地调查了风的特征，重点研究了它们的季节变化、概率分布和参数的相互依赖性。结果表明，主要风参数的季节变化明显，春季风速最高，夏季风向最强。值得注意的是，平均风速和湍流参数都一致地用对数正态分布很好地描述了各个季节。同时，湍流参数明显依赖于平均风速。进一步分析表明，地形对峡谷风场的调节起主导作用。盛行风向全年稳定，攻风角随入射风向的地形变化而变化。随后建立了简化的三参数谱模型。该模型准确地重建了所有季节的实测功率谱密度，并通过定义的谱对数偏差指数成功验证了其普遍适用性。该研究为类似复杂地形下风荷载的确定和结构安全评估奠定了重要的理论和经验基础。

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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