Journal of Wind Engineering and Industrial Aerodynamics最新文献_第6页

Optimization of cable quantity in cable-stayed bridges based on aerodynamic topology of the deck 基于桥面气动拓扑的斜拉桥索量优化

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-11-29 DOI: 10.1016/j.jweia.2025.106293

Amirhossein Tamimi , Amir Reza Ghiami Azad‬ , Cem Yalçın , Altok Kurşun

Due to their high efficiency, appropriate structural behavior, and aesthetic merits, the use of cable-stayed bridges continues to grow. One of the challenges faced by designers is the demand for increased span lengths of these bridges. With this increase in length, the effects of wind forces on the deck become more pronounced. Neglecting this issue, in addition to increasing the forces on the bridge elements and non-optimal design, can also pose safety hazards. In this regard, extensive research has been conducted on optimizing the elements of cable-stayed bridges against aerodynamic forces, among which the deck is one of the most influential elements on this behavior. The cable element is the subject of the majority of cable-stayed bridge optimization researches. However, the effect of deck optimization on cable optimization has not yet been investigated. In this study, first the deck topology of the Nissibi Bridge, located in Turkey, is aerodynamically optimized by two different approaches. The CFD model, validated using wind tunnel test data, simulates the transient aerodynamic forces on the deck. Next, the effect of deck topology optimization on the axial force of the cables is examined, and the total cable quantity of the bridge is reduced. Based on the results of this study, it is observed that minor adjustments in the deck geometry can increase the upward wind force on the deck up to 77 %. Also, benefitting from this upward force, which reduced the axial stress in the cables, the volume of the cable utilized in the bridge could be decreased by 4.1 %, which in this case is equivalent to 20.1 tons of high-strength steel. Using the method presented in this study, the wind force on the deck can be controlled and reduced, and thus, the design of the deck and cable elements can be optimized, ultimately reducing the cost of bridge construction.

由于其高效、合理的结构性能和美观的优点，斜拉桥的使用不断增长。设计师面临的挑战之一是增加这些桥梁的跨度长度的需求。随着长度的增加，风力对甲板的影响变得更加明显。忽视这一问题，除了增加桥梁构件受力和非优化设计外，还会造成安全隐患。在这方面，人们对斜拉桥的气动力构件进行了大量的优化研究，其中对斜拉桥气动力性能影响最大的构件之一就是桥面。索单元是大多数斜拉桥优化研究的主题。然而，甲板优化对缆索优化的影响尚未得到研究。在本研究中，首先采用两种不同的方法对土耳其Nissibi大桥的桥面拓扑结构进行空气动力学优化。利用风洞试验数据验证的CFD模型模拟了甲板上的瞬态气动力。其次，考察了桥面拓扑优化对缆索轴向力的影响，减少了桥梁的总缆索量。根据本研究的结果，观察到甲板几何形状的微小调整可以增加甲板上向上的风力高达77%。此外，受益于这种向上的力，它减少了电缆的轴向应力，桥中使用的电缆体积可以减少4.1%，在这种情况下相当于20.1吨高强度钢。利用本研究提出的方法，可以控制和减小桥面上的风力，从而优化桥面和索单元的设计，最终降低桥梁的施工成本。

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引用次数: 0

CFD-based study on TMDI performance in mitigating low-frequency vertical vortex-induced vibrations 基于cfd的TMDI抑制低频垂向涡激振动性能研究

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-11-28 DOI: 10.1016/j.jweia.2025.106294

Zhanbiao Zhang , Fuyou Xu , Mingjie Zhang , Yutong Zeng

To evaluate the performance of tuned mass damper inerter (TMDI) on mitigating the low-frequency vertical VIV responses of bridges, a CFD-based numerical simulation method for solving the responses of the fluid-structure-TMDI coupled system is proposed in this study. The VIV responses of a 4:1 rectangular cylinder under different TMDI and structural parameters are investigated. It is found that the VIV amplitude of the controlled structure is sensitive to the natural-frequency ratio of TMDI to structure (f∗) and the damping ratio of TMDI (ξ₂). For the concerned ranges of the mass ratio of damper to structure from 0.005 to 0.010 and the inerter-induced damper mass amplification factor from 5 to 10, the optimal f∗ and ξ₂ are within the ranges of 0.990–0.995 and 1.0 %–2.0 %, respectively. The difference in the mitigation effect between the CFD-based model and the empirical VIV force model is highlighted. The geometric and frequency scaling ratios has little effect on the mitigation effect, and thus can be artificially set as needed. The proposed method enables precise setting of system parameters and directly solves the fluid-structure interactions, thereby providing an effective approach for the TMDI design in mitigating low-frequency vertical VIV of bridges.

为了评估调谐质量阻尼器（TMDI）对桥梁低频垂向涡激振动的抑制效果，提出了一种基于cfd的流固耦合系统响应数值模拟方法。研究了4∶1矩形圆柱在不同TMDI和结构参数下的涡激振动响应。研究发现，被控结构的涡激振动幅值对TMDI与结构的固有频率比（f∗）和TMDI的阻尼比（ξ2）较为敏感。当阻尼器与结构的质量比在0.005 ~ 0.010范围内，阻尼器质量放大系数在5 ~ 10范围内时，最优f∗和ξ2分别在0.990 ~ 0.995和1.0% ~ 2.0%范围内。强调了基于cfd的模型与经验VIV力模型之间的缓解效果差异。几何比例和频率比例对减缓效果影响不大，因此可以根据需要人为设置。该方法能够精确设定系统参数，直接求解流固耦合，为缓解桥梁低频垂向涡激振动的TMDI设计提供了有效途径。

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引用次数: 0

Wind flow and wind loading by using the Dynamic Terrain approach 利用动态地形方法研究风的流动和风荷载

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-11-27 DOI: 10.1016/j.jweia.2025.106295

Theodore Potsis, Ted Stathopoulos

This paper extends the knowledge and methodologies in structural Computational Wind Engineering (CWE) applications in urban environments. A newly developed inflow turbulence generation technique is utilized that combines efficiency and accuracy in LES modeling – the so-called Dynamic Terrain (LES-DT). Main aspects of inflow turbulence generation for LES are discussed, and the differences between state-of-the-art techniques and the LES-DT are put into perspective. LES-DT is an engineering-based method, and it is applied for isolated and urban configurations, while the accuracy of the local wind induced peak pressures on the entire building envelope is evaluated, based on experiments from TPU for perpendicular and oblique wind. The impact of energy fluctuations of high frequency content on the incident flow and to mean and peak wind-induced pressures is discussed. LES-DT provides control over these fluctuations and can lead to accurate results via an efficient framework. Conclusions are drawn on sheltering effects for buildings in neighbors’ wakes, with LES-DT accurately capturing complex interference effects through validation metrics. An open-source code is available to facilitate its usage (https://github.com/tpotsis/DTv1.0). Given the current efforts to codify the use of CWE for structural applications internationally, this paper offers experimental and numerical insights to support this direction.

本文扩展了结构计算风工程（CWE）在城市环境中的应用知识和方法。动态地形（LES- dt）是一种新开发的流场湍流生成技术，它结合了LES建模的效率和准确性。讨论了LES流入湍流产生的主要方面，并对最新技术与LES- dt之间的差异进行了展望。LES-DT是一种基于工程的方法，它适用于隔离和城市配置，同时基于TPU对垂直风和斜风的实验，评估了整个建筑围护结构的局部风致峰值压力的准确性。讨论了高频能量波动对入射流和平均风致压力及峰值风致压力的影响。LES-DT提供了对这些波动的控制，并可以通过有效的框架产生准确的结果。通过验证指标，LES-DT能够准确捕捉复杂的干扰效应，得出了邻居尾流对建筑物的遮蔽效应的结论。有一个开放源代码可以方便地使用它（https://github.com/tpotsis/DTv1.0）。鉴于目前国际上正在努力编纂CWE在结构应用中的使用，本文提供了实验和数值见解来支持这一方向。

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引用次数: 0

The effects of an elongated building structure and skylight windows on wind-driven building ventilation 细长建筑结构和天窗对风动建筑通风的影响

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-11-26 DOI: 10.1016/j.jweia.2025.106269

Matko Jelašić , Christoph Irrenfried , Günter Brenn , Hrvoje Kozmar

Natural building ventilation is an approach that does not rely on the application of mechanical devices. It is energy-efficient and environmentally friendly, thus very much preferred to other commonly used ventilation methods. The present experimental work focuses on the effects of the building elongation and skylight windows on the building air change rate (ACH), a topic not assessed before. In this framework, freestream flow velocity, flow incidence angle, and the opening angle of windows were studied as well. Experiments were performed in a boundary layer wind tunnel (BLWT) on a small-scale generic building model subjected to a scaled atmospheric boundary layer (ABL). Hot-wire anemometry was used for the flow velocity measurements, while a tracer gas technique was used for the ACH experiments. The results indicate that the cross-ventilation yields substantially higher ACH compared to the single-sided ventilation, where the ACH increases linearly with an increase in the skylight window opening. The shortest building model (L = H, L is the building model length and H is the building model height) exhibited higher ACH than in the case of a cubic building model of the same dimensions, likely due to the window design and position. The ACH does not increase monotonically with the building elongation. The L = 2H model exhibited slightly higher ACH than for the most elongated (L = 3H) building model.

建筑自然通风是一种不依赖机械装置应用的方法。它既节能又环保，因此比其他常用的通风方式更受欢迎。目前的实验工作主要集中在建筑物伸长率和天窗对建筑物换气率（ACH）的影响，这是一个以前没有评估过的主题。在此框架下，还研究了自由流流速、气流入射角和窗开角。在尺度大气边界层（ABL）作用下的小型通用建筑模型上进行了边界层风洞（BLWT）实验。流速测量采用热线风速法，ACH实验采用示踪气体法。结果表明，与单面通风相比，交叉通风产生的ACH要高得多，单面通风的ACH随着天窗开度的增加而线性增加。最短的建筑模型（L = H， L为建筑模型长度，H为建筑模型高度）比相同尺寸的立方体建筑模型表现出更高的ACH，可能是由于窗户的设计和位置。ACH不随建筑物伸长而单调增加。L = 2H模型的ACH略高于L = 3H模型。

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引用次数: 0

Vertical vortex-induced vibration characteristics of triple-box girders and suppression performance of grid plates 三箱梁垂直涡激振动特性及网板抑制性能

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-11-21 DOI: 10.1016/j.jweia.2025.106290

Han Yang , Shixiong Zheng , Cunming Ma , Changze Xu , Ding Zeng , Xu Yang

This study investigates vortex-induced vibrations (VIV) in a long-span triple-box girder bridge using wind tunnel testing and numerical simulations, focusing on the effects of angle of attack (AoA) and grid plate mitigation strategies. Two VIV lock-in regions are identified: the first, sensitive to AoA, exhibits dimensionless amplitudes (y_max/D) of 0.035, 0.067, and 0.081 at +3°, 0°, and −3°, respectively; the second is AoA-insensitive. In the first region, combining aerodynamic analysis with high-order dynamic mode decomposition (HODMD), it is found that decreasing AoA destabilizes the flow, amplifying vortex strength and pressure fluctuations. The first-order mode dominates the VIV, with intensity and energy input increasing as AoA decreases, exacerbating the VIV response. The grid plates applied along the edges of the slot opening significantly mitigate the VIV, achieving complete suppression at a porosity of 25 %. These grid plates modify the aerodynamic profile, weaken airflow coupling between the upper and lower surfaces, thus reducing energy input. This study provides valuable insights into VIV mechanisms in triple-box girders and offers effective strategies for vibration control in similar bridge designs.

本文通过风洞试验和数值模拟研究了大跨度三箱梁桥的涡激振动，重点研究了迎角（AoA）和栅格板减振策略的影响。我们发现了两个VIV锁定区：第一个对AoA敏感，在+3°、0°和- 3°时，其无因次振幅（ymax/D）分别为0.035、0.067和0.081；第二种是aoa不敏感。在第一个区域，将气动分析与高阶动态模态分解（HODMD）相结合，发现AoA的减小使流动失稳，增大了涡强度和压力波动。涡激振动以一阶模态为主，随着AoA的减小，强度和能量输入增加，加剧了涡激振动响应。沿槽口边缘施加的栅格板显著减轻了VIV，在孔隙率为25%时实现了完全抑制。这些栅格板改变了空气动力学剖面，削弱了上下表面之间的气流耦合，从而减少了能量输入。该研究为三箱梁的振动机理提供了有价值的见解，并为类似桥梁的振动控制提供了有效的策略。

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引用次数: 0

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

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

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

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

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

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

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引用次数: 0

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

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

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

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

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

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

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引用次数: 0

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

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

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

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

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

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

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引用次数: 0

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

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

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

Jialong Li , Lei Yan , Xuhui He , Tongqing Lu

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

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

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引用次数: 0

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

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

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

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

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

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

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引用次数: 0