Journal of Wind Engineering and Industrial Aerodynamics最新文献_第4页

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 : 2026-01-10 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

Flow acceleration effects on aerodynamic pressures of a 3:2 rectangular prism at critical angle of attack: A VMD–POD-based analysis 流动加速度对临界迎角3:2矩形棱镜气动压力的影响：基于vmd - pod的分析

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-01-09 DOI: 10.1016/j.jweia.2026.106335

Zhong-Xu Tan , Le-Dong Zhu , Xiu-Yu Chen

This study investigates the transient aerodynamic pressures on a 3:2 rectangular prism under accelerating flow at a critical angle of attack of 10° using numerical simulations. Variational Mode Decomposition (VMD) is employed to decompose the pressure signals into three principal components: a time-varying mean component, an attenuated fluctuating component, and a stable fluctuating component. Proper Orthogonal Decomposition (POD) is further applied to characterize the spatiotemporal features of each component, revealing that the first two POD modes capture over 92 % of the total energy, with spatially invariant covariance modes across different flow accelerations. The results indicate that flow acceleration induces significant unsteady effects, including amplified pressure fluctuations on leeward surfaces and adjacent corner regions, as well as a reduced Strouhal number during acceleration. Flow field analysis shows that acceleration alters vortex shedding patterns, enhances flow separation, and thereby amplifies transient pressure fluctuation. These findings demonstrate that conventional quasi-steady theory is inadequate for predicting wind loads under accelerating flows, and that the proposed VMD–POD analytical framework provides an effective component-based methodology for the wind-resistant design of structures exposed to non-synoptic wind events.

采用数值模拟的方法研究了临界迎角为10°时加速流动条件下3:2矩形棱镜的瞬态气动压力。采用变分模态分解（VMD）将压力信号分解为时变平均分量、衰减波动分量和稳定波动分量三个主分量。利用适当正交分解（POD）进一步表征各分量的时空特征，发现前两种POD模式捕获了92%以上的总能量，并且在不同的流动加速度下具有空间不变的协方差模式。结果表明，流动加速引起了显著的非定常效应，包括下风面和相邻角区压力波动放大，加速过程中斯特劳哈尔数减少。流场分析表明，加速改变了旋涡脱落模式，增强了流动分离，从而放大了瞬态压力波动。这些研究结果表明，传统的准稳态理论不足以预测加速气流下的风荷载，所提出的VMD-POD分析框架为非天气性风事件下结构的抗风设计提供了一种有效的基于构件的方法。

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引用次数: 0

An explainable deep ensemble model for probabilistic prediction of typhoon effects on a long-span bridge 台风对大跨度桥梁影响概率预测的可解释深度集合模型

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-01-07 DOI: 10.1016/j.jweia.2025.106330

Haoqing Li , Yiming Zhang , Hao Wang , Yichao Xu , Dan Li

Long-span bridges usually suffer severe vibrations under extreme wind events (such as typhoons), potentially leading to engineering failures and traffic accidents. Data-driven approaches facilitate the mitigation of risks through timely and accurate prediction of typhoon effects. Deep learning (DL) algorithms, including the convolutional neural network (CNN), long short-term memory (LSTM), and their combined models, have been extensively applied in various fields. Despite the superior predictive performance of CNN-LSTM in time series, it fails to provide probabilistic estimates to quantify uncertainty and lacks adequate interpretability. In this work, a CNN-bidirectional LSTM-based explainable deep ensemble (CNN-BiLSTM-EDE) model is proposed for the probabilistic prediction of typhoon effects on long-span bridges. Specifically, CNN and BiLSTM are integrated to enhance the capability of processing spatiotemporal typhoon characteristics. A deep ensemble scheme is then adopted to modify the CNN-BiLSTM architecture, enabling dynamic response estimation within a probabilistic framework. The final prediction is obtained by averaging the results through ensemble learning. Shapley additive explanation (SHAP) is introduced to reveal the marginal contributions and substantive impacts of feature variables on the model predictions. Decade-long typhoon datasets of a kilometer-scale long-span bridge are utilized to validate the proposed model. The results indicate that CNN-BiLSTM-EDE provides reliable response predictions while quantifying uncertainty by offering corresponding conditional distribution. According to the SHAP visualization results, mean wind speed and wind direction angle are identified as the most influential factors in predicting typhoon effects. Compared with four probabilistic benchmark models, CNN-BiLSTM-EDE demonstrates superior prediction accuracy and uncertainty quantification performance.

大跨度桥梁通常在极端风事件（如台风）下遭受剧烈振动，可能导致工程故障和交通事故。数据驱动的方法通过及时和准确地预测台风影响，有助于减轻风险。深度学习（DL）算法，包括卷积神经网络（CNN）、长短期记忆（LSTM）及其组合模型，已广泛应用于各个领域。尽管CNN-LSTM在时间序列上具有优越的预测性能，但它无法提供概率估计来量化不确定性，并且缺乏足够的可解释性。本文提出了一种基于cnn -双向lstm的可解释深度集合（CNN-BiLSTM-EDE）模型，用于台风对大跨度桥梁影响的概率预测。将CNN与BiLSTM相结合，增强台风时空特征的处理能力。然后采用深度集成方案对CNN-BiLSTM体系结构进行修改，实现了在概率框架内的动态响应估计。通过集成学习对结果进行平均，得到最终的预测结果。引入Shapley加性解释（SHAP）来揭示特征变量对模型预测的边际贡献和实质性影响。利用某公里尺度大跨度桥梁十年来的台风数据对模型进行了验证。结果表明，CNN-BiLSTM-EDE在给出相应条件分布量化不确定性的同时，提供了可靠的响应预测。根据SHAP可视化结果，确定平均风速和风向角是预测台风影响的最重要因素。与4种概率基准模型相比，CNN-BiLSTM-EDE模型具有较好的预测精度和不确定性量化性能。

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引用次数: 0

Sensitivity analysis of structural response to thunderstorm downburst models 结构对雷暴暴模式响应的敏感性分析

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-01-07 DOI: 10.1016/j.jweia.2026.106332

Ahmed M. Maky , Djordje Romanic , Matiyas A. Bezabeh

Most studies on structural response under downburst wind loads rely on a single downburst model or limited wind measurements. Uncertainties in key modeling parameters further complicate accurate response predictions. Furthermore, there are no standard formulations for power spectral density (PSD) or coherence functions specific to downburst turbulence characteristics. As a first step toward developing a probabilistic uncertainty quantification framework, this study examines the impact of various modeling assumptions and parameter uncertainties on structural response, utilizing the CAARC building as a testbed. A hazard analysis was conducted to predict the design-level downburst wind speed based on NOAA database records over 45 years. A global sensitivity analysis was utilized to rank the influence of uncertain modeling parameters. The results indicate that the structural response is mainly sensitive to maximum wind speed in the vertical profile. Other moderately influential parameters include the stagnation region radius, the building's position relative to the downburst center, and the mean turbulence intensity. While different vertical wind profile models affect the mean responses, they have minimal impact on the response probability distribution. In contrast, the coherence function significantly affects the probability distribution of maximum building drift, whereas variations in PSD functions have negligible effects.

下突风荷载作用下结构响应的大多数研究依赖于单一的下突风模型或有限的风测量。关键建模参数的不确定性进一步使准确的响应预测复杂化。此外，对于功率谱密度（PSD）或特定于下击湍流特性的相干函数，没有标准公式。作为开发概率不确定性量化框架的第一步，本研究利用CAARC建筑作为试验台，研究了各种建模假设和参数不确定性对结构响应的影响。利用美国国家海洋和大气管理局（NOAA） 45年的数据库记录，进行了危害分析，预测了设计级降暴雨风速。利用全局敏感性分析对不确定建模参数的影响进行排序。结果表明，结构响应主要对垂直剖面最大风速敏感。其他中等影响的参数包括停滞区半径、建筑物相对于下爆中心的位置和平均湍流强度。不同的垂直风廓线模式对平均响应有影响，但对响应概率分布的影响较小。相比之下，相干函数显著影响最大建筑物漂移的概率分布，而PSD函数的变化影响可以忽略不计。

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引用次数: 0

Wind tunnel experimental study of the effect of shading devices on wind-driven single-sided natural ventilation 遮阳装置对风力单面自然通风影响的风洞实验研究

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-01-05 DOI: 10.1016/j.jweia.2025.106328

Xiaochen Zhang , Zhengtao Ai , Lian Shen , Kenny C.S. Kwok , Zhongjian Jia , Guoqiang Zhang

Shading devices strongly influence façade aerodynamics but remain insufficiently examined for wind-driven single-sided ventilation (SSV). This study evaluates how external shading configurations modify the external–internal pressure difference and the resulting ventilation potential. Wind tunnel experiments were conducted on a 600-mm cubic model with a 350 × 350 mm opening, where twelve shading configurations were tested under wind directions from 0° to 180°. A ventilation-induced force (VIF) metric is introduced by directly integrating internal and external pressure coefficients, addressing the limitations of sealed-model approaches for SSV. Results show that shading type is the primary determinant of VIF magnitude, and its influence is strongly mediated by wind direction. Panel-type shading systems produce substantially stronger pressure-driven potential than louver-type systems, with vertical and composite panel-type shading systems exhibiting the greatest enhancement under oblique winds (60°–90°), where façade pressure differences are most sensitive to shading geometry. Installation angle further governs the performance of vertical panel-type shading systems: a 45° inclination enhances VIF across wind directions, whereas a 135° inclination weakens it, while horizontal panel-type shading systems display only minor angle sensitivity.

The findings clarify how shading type, installation angle, and wind direction jointly shape the ventilation-driving potential of large-opening façades. The study provides systematic experimental data and practical guidance for selecting shading configurations that enhance natural ventilation performance in early-stage façade design.

遮阳装置强烈影响空气动力学，但对风驱动的单侧通风（SSV）的研究还不够。本研究评估了外部遮阳配置如何改变外部-内部压力差和由此产生的通风潜力。在600 mm立方的模型上进行风洞实验，模型开口为350 × 350 mm，在0°~ 180°风向下测试了12种遮阳构型。通过直接整合内外压力系数，引入了通风诱导力（VIF）度量，解决了SSV密封模型方法的局限性。结果表明，遮阳类型是影响VIF大小的主要因素，其影响受风向的强烈调节。面板遮阳系统比百叶遮阳系统产生更强的压力驱动潜力，垂直和复合面板遮阳系统在斜风（60°-90°）下表现出最大的增强，其中面板压力差对遮阳几何形状最敏感。安装角度进一步决定了垂直板型遮阳系统的性能：45°的倾角增强了风向上的VIF，而135°的倾角减弱了它，而水平板型遮阳系统只显示出很小的角度敏感性。研究结果阐明了遮阳类型、安装角度和风向如何共同影响大开口遮阳墙的通风驱动潜力。该研究为早期遮阳设计中选择提高自然通风性能的遮阳配置提供了系统的实验数据和实践指导。

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引用次数: 0

Aerodynamic heating of evacuated tube transportation in choked flow under coupled forced convection and surface radiation 强制对流和表面辐射耦合作用下呛流中真空管输送的气动加热

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-01-05 DOI: 10.1016/j.jweia.2026.106333

Fuzhong Xie, Fujian Jiang, Qiujun Yu, Yanping Yuan, Jiqiang Niu

High-speed maglev trains operating within low-vacuum tubes face significant aerodynamic heating challenges, exacerbated by the inherent choked effects. Addressing the limitations of existing studies of aerothermodynamics on ETT, which focus on sole heat transfer method and flow structure under choked conditions, this paper investigates aerodynamic heating of ETT under choked conditions with coupled forced convection and surface radiation. Compared to convection only, the vehicle's surface temperature is lower under convection and radiation coupling and it declines with increasing distance from the nose, with a sharp increase at the tail, demonstrating a significant temperature gradient, while radiation heat flux generally shows an upward trend. Crucially, under supersonic flows with high blockage ratios, the vehicle's average temperature exceeds 400 K, with a temperature difference of over 100 K. The radiation heat flux at the nose becomes negative and the vehicle faces serious aerodynamic heating effects, with limited capability to radiate heat outward. While vacuum level does not govern the onset of choked flow, it significantly reduces vehicle surface temperature especially the tail temperature, particularly when pressures are below 0.2 atm. These findings enhance the comprehensive understanding of aerodynamic heating characteristics in choked flows, informing the design of ETT's thermal protection systems.

在低真空管中运行的高速磁悬浮列车面临着巨大的气动加热挑战，而固有的阻塞效应加剧了这一挑战。针对现有的空气热力学研究局限于单一换热方法和堵塞条件下的流动结构，本文研究了强制对流和表面辐射耦合的堵塞条件下ETT的气动加热。与仅对流相比，对流与辐射耦合下的飞行器表面温度较低，且随距离机头距离的增加而下降，在尾部急剧上升，温度梯度明显，而辐射热通量总体呈上升趋势。至关重要的是，在高堵塞比的超音速流动下，车辆的平均温度超过400k，温差超过100k。机头处的辐射热通量变为负值，飞行器面临严重的气动加热效应，向外辐射热量的能力有限。虽然真空度不能控制阻塞流的发生，但它可以显著降低车辆表面温度，特别是尾部温度，特别是当压力低于0.2 atm时。这些发现增强了对阻塞流中气动加热特性的全面理解，为ETT热保护系统的设计提供了信息。

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引用次数: 0

Comparison of aerodynamic force characteristics for closed-box girder under vortex-induced vibration condition between free-vibration and fixed states 自由振动与固定状态下涡激振动闭箱梁气动力特性比较

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-01-02 DOI: 10.1016/j.jweia.2025.106325

Zhimin Chai , Genshen Fang , Yongxin Yang , Zuopeng Wen , Shipeng Gao , Rushen Su , Xinhua Liu , Yaojun Ge

Closed-box girders have been widely used in long-span bridges due to their excellent aerodynamic performance. However, the installation of ancillary facilities may trigger significant vortex-induced vibrations (VIV). This study employed synchronous pressure and vibration measurement in a wind tunnel test on both free-vibration and fixed sectional models. The aim of this study is to obtain surface pressure distributions under several different conditions. The aerodynamic force was determined by summing the distributed pressures of both free-vibration and fixed models. The distribution characteristics of the forces were investigated through analysis of the mean pressure coefficients, fluctuating pressure coefficients and the correlation between distributed pressure and the overall force. Moreover, the Variational Mode Decomposition (VMD) method was utilized to conduct a subcomponent decomposition analysis of the aerodynamic force. The results demonstrated that the VIV responses of the closed box girder were found to be significantly influenced by the layout of the maintenance rails. The process of VIV can be divided into three distinct stages: initiation, development and stable stage. Subcomponent analysis concluded that energy from aerodynamic forces increased with vibration amplitude, while fixed-model energy remained at a low level, implying a balance between energy input and dissipation during limit-cycle oscillations. The results of the subcomponent analysis indicate the critical role of the aerodynamic force in the excitation of VIV. Among the subcomponents of the aerodynamic forces, the subcomponent with a center frequency most closely aligned with the natural frequency of the structure is most closely associated with the excitation of the vortex-induced vibrations.

闭箱梁以其优异的气动性能在大跨度桥梁中得到了广泛的应用。然而，辅助设施的安装可能会引发严重的涡激振动（VIV）。本研究在风洞试验中对自由振动和固定截面模型进行了同步压力和振动测量。本研究的目的是获得几种不同条件下的表面压力分布。气动力由自由振动模型和固定模型的分布压力之和确定。通过分析平均压力系数、波动压力系数以及分布压力与整体力的相关性，研究了受力的分布特征。此外，利用变分模态分解（VMD）方法对气动力进行子分量分解分析。结果表明：闭式箱梁的振动响应受维护轨布置的显著影响。VIV的过程可分为起始、发展和稳定三个阶段。子分量分析表明，气动力能量随振动幅值的增加而增加，而固定模型能量保持在较低水平，说明极限环振动过程中能量输入与耗散达到平衡。子分量分析结果表明，气动力对涡激飞行器的激励起着至关重要的作用。在气动力的子分量中，中心频率与结构固有频率最接近的子分量与涡激振动的激发关系最密切。

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引用次数: 0

A LiDAR-CFD-wind tunnel integrated framework for urban wind field reconstruction: The SEG Plaza case 城市风场重建的激光雷达- cfd -风洞集成框架：SEG广场案例

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-01-02 DOI: 10.1016/j.jweia.2025.106329

Jiazhi Yan , Qingke Han , Lijun Yuan , Zhihui Wang , Yanlong Guo , Kunbo Wen , Xianfeng Yu , Muguang Liu , Yi Yang

Accurate simulation of boundary layer wind fields is crucial for analyzing structural wind effects, particularly for super-tall buildings in complex urban settings. This study addresses wind field reconstruction and validation challenges, focusing on the “5·18″ wind-induced vibration event at SEG Plaza, Shenzhen. It integrates field measurements, wind tunnel experiments, and numerical simulations, using a refined urban model within a 500-m radius. Results are compared with Doppler lidar data and detailed simulations to establish an evaluation framework. The study also examines wind field reconstruction with limited surrounding building data. Key findings include: 1) Wind tunnel results closely match LiDAR measurements above 200 m, with a correlation coefficient of 0.975 (RMSE 0.021); 2) The average wind speed profile exponent from wind tunnel tests is 0.30, with speeds at 350 m ranging from 10.30 to 10.72 m/s; 3) A simplified 200-m radius model can capture key high-altitude wind field traits; 4) Numerical simulations with equilibrium inflow conditions outperform wind tunnel tests when urban data is scarce. This “field measurement – numerical simulation – physical simulation validation” approach will offer a wind field reconstruction method for analyzing sudden wind event.

边界层风场的精确模拟是分析结构风效应的关键，特别是对于复杂城市环境中的超高层建筑。本研究以深圳SEG广场“5·18″”风致振动事件为研究对象，解决了风场重建和验证的挑战。它集成了现场测量、风洞实验和数值模拟，使用了半径500米范围内的精细城市模型。结果与多普勒激光雷达数据和详细的模拟进行了比较，以建立评估框架。该研究还研究了在有限的周围建筑数据下的风场重建。主要发现包括：1)风洞测量结果与200 m以上激光雷达测量结果吻合较好，相关系数为0.975 (RMSE 0.021)；2)风洞试验平均风速廓线指数为0.30,350 m风速范围为10.30 ~ 10.72 m/s；3)简化的200 m半径模型可以捕捉高空风场的关键特征；4)当城市数据稀缺时，平衡入流条件下的数值模拟效果优于风洞试验。这种“现场测量-数值模拟-物理模拟验证”的方法将为分析突发性风事件提供一种风场重建方法。

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引用次数: 0

Validation of rooftop wind measurements in the urban environment: Comparison between wind tunnel results and field data 城市环境中屋顶风测量的验证：风洞结果与现场数据的比较

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-31 DOI: 10.1016/j.jweia.2025.106322

Sean McTavish, Hali Barber, Alanna Wall

Urban airflow characteristics from a full-scale field test were compared to those from a model-scale wind tunnel test to validate the use of model-scale data in the development of urban airflows guidance and recommendations. Rooftop-mounted anemometer measurements were acquired during a field study conducted in Montréal, Canada in 2023, and wind-tunnel data were acquired at the same relative rooftop-anemometer locations using a 1:300 scale model. The comparison between the field study and wind-tunnel test was enabled by identifying a compatible set of reference conditions. The airflow properties, including the mean wind speed, turbulence intensity, and flow angularity, had better agreement between field data and wind-tunnel data for the buildings that were in the core of the urban environment, where building wakes are the dominant flow feature. Flow speed and turbulence intensity were often higher in the field than in the wind tunnel, although the general trends in these parameters were predicted adequately overall. The use of airport-weather station data as the reference conditions in the field was shown to be a practical approach in the absence of a local reference in the city. A comparison of the velocity spectra between the field test and the wind-tunnel test showed good agreement over the range of full-scale frequencies that are related to typical building-widths and to the size of future urban air mobility vehicles.

将来自全尺寸现场测试的城市气流特性与模型尺度风洞测试的结果进行比较，以验证模型尺度数据在城市气流指导和建议开发中的应用。2023年在加拿大montracimal进行的实地研究中获得了安装在屋顶上的风速仪的测量数据，并使用1:300比例模型在相同的相对屋顶风速仪位置获得了风洞数据。通过确定一组兼容的参考条件，可以将现场研究与风洞试验进行比较。在城市环境的核心位置，建筑尾迹是主要的气流特征，现场数据和风洞数据吻合较好，包括平均风速、湍流强度和气流角。尽管这些参数的总体趋势在总体上得到了充分的预测，但在野外的流速和湍流强度往往高于风洞。使用机场气象站数据作为实地的参考条件被证明是在城市缺乏当地参考条件的情况下的一种实用方法。现场试验和风洞试验的速度谱比较表明，在与典型建筑物宽度和未来城市空中交通工具尺寸相关的全尺寸频率范围内，速度谱的一致性很好。

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引用次数: 0

Experimental investigation of dynamic response characteristics of metal roof panels under wind-hail interaction effects 风雹作用下金属屋面板动力响应特性试验研究

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-31 DOI: 10.1016/j.jweia.2025.106331

Juncai Chen , Yimin Dai , Taiting Liu , Lipeng Yuan , Yilin Peng

Hail disasters, a typical extreme weather event, are often accompanied by strong winds. Wind speed variations significantly affect the dynamic response of metal roof panels subjected to hail impact, highlighting the need to investigate wind-hail interaction effects. This study systematically investigates the dynamic responses of typical metal roof panels under wind-hail interaction through impact testing and numerical simulations. Results show that the influence of wind amplifies stress, strain, and displacement responses, with the effect closely related to hail diameter: smaller hail experiences stronger wind influence, while the effect diminishes as hail size increases. To accurately simulate the hail impact process, a fluid–structure interaction model was developed in LS-DYNA, showing excellent agreement with experimental data. Comparison with a simplified model indicates that both models can accurately predict the dynamic responses under small-diameter hail impacts, but the simplified model tends to overestimate structural responses for larger hail. Additionally, a displacement prediction model considering wind-hail interaction was developed using multivariate nonlinear regression analysis. The model exhibits good predictive capability under conventional conditions (hail diameters below 58 mm; wind speeds of 0–15 m/s). This study provides a useful reference for the hail-resistant design and risk assessment of metal roofing systems.

冰雹灾害是一种典型的极端天气事件，通常伴随着强风。风速变化显著影响冰雹冲击下金属屋面板的动态响应，突出了研究风-雹相互作用效应的必要性。通过冲击试验和数值模拟，系统研究了典型金属屋面板在风雹作用下的动力响应。结果表明：风的影响放大了冰雹的应力、应变和位移响应，其效应与冰雹直径密切相关，较小的冰雹受风的影响更强，而随着冰雹尺寸的增大，风的影响逐渐减弱；为了准确模拟冰雹撞击过程，在LS-DYNA中建立了流固耦合模型，与实验数据吻合良好。与简化模型的对比表明，两种模型都能准确预测小直径冰雹冲击下的结构响应，但简化模型对大直径冰雹的结构响应有高估的倾向。此外，利用多元非线性回归分析建立了考虑冰雹相互作用的位移预测模型。该模型在常规条件下（冰雹直径小于58 mm，风速0 ~ 15 m/s）具有较好的预测能力。该研究为金属屋面系统的抗冰雹设计和风险评估提供了有益的参考。

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引用次数: 0