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

Mechanisms of three types of roll structures in the typhoon boundary layer 台风边界层三种涡旋结构的机制

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-13 DOI: 10.1016/j.jweia.2025.106317

Hehe Ren , Jimy Dudhia , Shitang Ke , Shujin Laima , Wen-Li Chen , Hui Li

The boundary layer is crucial to understanding the potential damage caused by typhoons, as the organized motions within it significantly affect the transfer of momentum, heat, moisture, and other substances. In the present study, three types of roll structures are identified in the typhoon boundary layer. The Type-A roll structure, caused by shear instability (0 < Ri < 0.25), has two modes. Mode-I is associated with the tangential wind, located slightly inside the radius of maximum wind and oriented vertically upward, with the roll axis nearly parallel to the tangential wind. Mode-II is associated with the radial wind, located at the radius of maximum wind and tilted upward, with the roll axis nearly parallel to the radial wind. Furthermore, at the same radius, Mode-I dominates at a higher height, while Mode-II dominates at a lower height. The dominant mode shifts from Mode-I to Mode-II as typhoon intensity increases, as more intense typhoons tend to exhibit annular characteristics with a more tilted eyewall structure. The Type-B roll structure, caused by inertial instability, is reflected in the flat region of total angular momentum and is located just outside the radius of maximum wind, with the roll axis nearly parallel to the radial wind. The Type-C roll structure, caused by inflection point instability, is located outside the Type-B roll structure, with the roll axis nearly parallel to the tangential wind. An accurate understanding of the mechanisms of these three types of roll structures plays a significant role in research on typhoon structure, numerical prediction models, disaster assessment models, and wave and storm surge dynamics.

边界层对了解台风造成的潜在损害至关重要，因为边界层内有组织的运动显著影响动量、热量、水分和其他物质的转移。在本研究中，在台风边界层中确定了三种类型的卷结构。由剪切失稳（0 < Ri < 0.25）引起的a型辊结构有两种模态。模式i与切向风有关，位于最大风半径略内，垂直向上，横摇轴几乎与切向风平行。模式ii与径向风有关，位于最大风半径处，向上倾斜，横摇轴与径向风几乎平行。在相同半径下，模式i在较高高度占主导地位，模式ii在较低高度占主导地位。随着台风强度的增加，主导模态由i型向ii型转变，越强的台风往往呈现环状特征，眼壁结构越倾斜。b型横摇结构由惯性失稳引起，反映在总角动量的平坦区，位于最大风半径的正外侧，横摇轴几乎平行于径向风。由拐点失稳引起的c型轧辊结构位于b型轧辊结构外侧，轧辊轴与切向风几乎平行。准确认识这三种卷结构的形成机理，对台风结构、数值预报模式、灾害评估模式、波浪风暴潮动力学等方面的研究具有重要意义。

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引用次数: 0

Design and aerodynamic mechanism of flexible membranes for mitigating vortex-induced vibration of a long-span bridge 大跨度桥梁柔性膜减振设计及气动机理研究

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-13 DOI: 10.1016/j.jweia.2025.106316

Haoyu Xu , Chaoqun Wang , Kun Yan , Libo Meng , Xugang Hua , Zhengqing Chen

Flexible membranes (FM) have been proved to be effective in suppressing vortex-induced vibration (VIV) of bluff bodies; however, the design and aerodynamic mechanism of FMs for VIV mitigation of bridges have not been fully investigated. In this study, the unexpected VIV recently observed in a cable-stayed bridge is described, and a comprehensive experimental study of VIV mitigation using FMs is presented. A series of wind tunnel tests are carried out on a sectional model of the bridge girder, to study the effect of installation location, geometric width, material and spanwise distance of FMs on their VIV-mitigation performance. After a series of aerodynamic optimization, segmented FMs installed under the wind fairings of the girder can successfully mitigate the large-amplitude VIV of the Π-shaped girder in both ‘no-vehicle’ and ‘traffic jam’ situations. Furthermore, smoke-wire visualization technology is employed for flow visualization in the tests. The wake instability, as well as the aerodynamic interference between spanwise and streamwise vortices resulted from FMs, are supposed to be the aerodynamic mechanisms for VIV mitigation of the girder. This study lays a foundation for the practical application of FMs in emergency VIV-mitigation of long-span bridges.

柔性膜（FM）在抑制钝体涡激振动（VIV）方面具有较好的效果；然而，FMs的设计及其在桥梁减振中的气动机理尚未得到充分的研究。本研究描述了最近在斜拉桥中观测到的意外涡激振动，并提出了一项利用FMs进行涡激振动抑制的综合实验研究。在某桥梁截面模型上进行了一系列风洞试验，研究了FMs的安装位置、几何宽度、材料和展向距离对其抗涡激振动性能的影响。经过一系列的气动优化，在梁的整流罩下安装分段FMs，可以成功地缓解Π-shaped梁在“无车”和“堵车”情况下的大振幅VIV。此外，试验中还采用了烟丝显示技术进行流动显示。尾迹的不稳定性以及由FMs引起的跨向涡和顺向涡的气动干扰被认为是减缓梁的涡激振动的气动机制。本研究为FMs在大跨度桥梁应急振动抑制中的实际应用奠定了基础。

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引用次数: 0

Wall-attached and detached turbulence structures in the urban atmospheric surface layer under thermal stratification 热分层下城市大气表层附壁和分离型湍流结构

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-11 DOI: 10.1016/j.jweia.2025.106315

Liping Zhu , Jiao Chen , Bo Jin , Wanting Liu , Xuebo Li

This study examines the scale-dependent energy characteristics ofwall-coherent and wall-incoherent turbulent motions in the atmospheric surface layer (ASL) under different thermal stratification regimes. Field measurements were conducted on flat, thermally homogeneous terrain using a vertical array of sonic anemometers to obtain high-frequency measurements of streamwise (

u

), spanwise (

v

), and temperature (

θ

) fluctuations. A spectral decomposition method based on linear coherence analysis separated wall-attached structures from background turbulence, allowing for a detailed assessment of energy partitioning across scales. The results show that the slope of the energy spectra within the inertial subrange decreases systematically with the Monin–Obukhov stability parameter, with coherent components exhibiting greater sensitivity to buoyancy effects than incoherent ones. The relative contribution of coherent energy increases under unstable stratification but diminishes with wall-normal height, indicating a progressive breakdown of surface-connected motions. In contrast, incoherent energy becomes more dominant farther from the ground. These trends are especially evident in the streamwise velocity and temperature spectra and are consistent with the scaling behavior of wall-attached eddies. These results elucidate turbulence organization in thermally stratified boundary layers and enable multiscale parameterization for outdoor environments, supporting urban heat mitigation modeling, building microclimates, and the thermal performance under varying atmospheric conditions.

本文研究了不同热分层制度下大气表层壁面相干和壁面非相干湍流运动的尺度相关能量特征。现场测量是在平坦、热均匀的地形上进行的，使用垂直声速计阵列来获得流向(u)、展向(v)和温度（θ）波动的高频测量。基于线性相干分析的光谱分解方法将附壁结构从背景湍流中分离出来，从而可以详细评估跨尺度的能量分配。结果表明：惯性子范围内的能谱斜率随Monin-Obukhov稳定性参数的增大而系统减小，相干分量比非相干分量对浮力效应更敏感；相干能量的相对贡献在不稳定分层下增加，但随着壁向高度的增加而减少，表明表面连接运动的逐渐破坏。相反，非相干能量在离地面越远的地方就越占优势。这种趋势在沿流速度和温度谱中表现得尤为明显，与附壁涡的结垢行为相一致。这些结果阐明了热分层边界层中的湍流组织，实现了室外环境的多尺度参数化，支持城市热缓解建模、建筑小气候和不同大气条件下的热性能。

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引用次数: 0

Aerodynamic interference mechanism of adjacent dual-separated highway bridge on the aeroelastic characteristics of a long-span high-speed railway bridge 相邻双隔公路桥气动干扰机理对某大跨高速铁路桥梁气动弹性特性的影响

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-10 DOI: 10.1016/j.jweia.2025.106312

Zhiwei Xu , Yan Jin , Tianrui Zhang , Haiyan Wang

Aerodynamic interference significantly influences the aeroelastic stability of parallel bridges. This study investigates the parallel railway-highway Quanzhou Bay Cross-sea Bridge, employing Computational Fluid Dynamics (CFD) simulations to systematically examine the influence of four key factors: incoming wind direction, horizontal spacing, vertical spacing, and angle of attack (AOA). The investigation also examines the influence of the Reynolds number on the railway bridge's flutter derivatives in the presence of this interference. Results indicate that the adjacent bridge significantly alters the local flow field and pressure distribution of the railway bridge, thereby affecting the values and evolution of its flutter derivatives, particularly when the railway bridge is on the leeward side. Different flutter derivatives exhibit varying sensitivities to this interference, with certain derivatives demonstrating considerable robustness. The study further reveals complex, nonlinear coupling effects between the AOA and aerodynamic interference, which can lead to a significant amplification of specific cross-derivatives at certain positive angles. Furthermore, the influence of the Reynolds number on the flutter derivatives is substantial; some derivatives, notably

H_{1}^{*}

and

A_{1}^{*}

, exhibit abrupt changes driven by flow regime transitions within specific Reynolds number ranges. These results provide theoretical guidance and a practical reference for the wind-resistant design of parallel bridge systems.

气动干扰对并联桥梁的气动弹性稳定性影响显著。以泉州湾跨海铁路-公路并联大桥为研究对象，采用计算流体力学（CFD）模拟方法，系统分析了来风方向、水平间距、垂直间距和迎角四个关键因素对跨海铁路-公路并联大桥的影响。本文还研究了存在这种干扰时雷诺数对铁路桥颤振导数的影响。结果表明，相邻桥梁显著改变了铁路桥梁的局部流场和压力分布，从而影响了其颤振导数的取值和演化，特别是当铁路桥梁处于背风侧时。不同的颤振导数对这种干扰表现出不同的敏感性，某些导数表现出相当的鲁棒性。研究进一步揭示了AOA与气动干扰之间复杂的非线性耦合效应，这种耦合效应会导致特定正角度下比交叉导数的显著放大。此外，雷诺数对颤振导数的影响很大；某些衍生物，特别是H1*和A1*，在特定雷诺数范围内，由于流型转变而表现出突变。研究结果为并联桥梁体系的抗风设计提供了理论指导和实践参考。

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引用次数: 0

Potential application of aeroelastic energy harvesters with two symmetrical bionic streamlined ornaments 具有两个对称仿生流线型装饰的气动弹性能量收集器的潜在应用

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-08 DOI: 10.1016/j.jweia.2025.106299

Hao-ting Shen , Zhong-cai Zhang , Hui-min Song , Meng Qi , Wei-yang Qin , Hai-tao Li

Inspired by avian wings and the unique streamlined body of fish, this manuscript introduces a wind energy harvester featuring two symmetrical bionic streamlined ornaments. A theoretical framework is derived and verified via numerical simulations and wind tunnel tests. Wind tunnel tests are conducted to examine the characteristics of a piezoelectric aeroelastic energy harvester, which is equipped with two streamlined ornaments symmetrically attached to the surface of the cuboid bluff body. Varying thickness-chord ratios (TCr), ornament positions and h_b/D_B (h_b is the height of the ornament, D_B is the diameter of the cuboid bluff body) cause the wind energy harvester to exhibit distinct vibration modes: vortex-induced vibration (VIV) and galloping. At a wind speed of 5 m/s, C-M-0.5 achieves an 82.4 % increase in maximum RMS output voltage compared to the cuboid bluff body, while C-M-0.2 and C-B-0.3 reduce the critical galloping wind speed by 15.38 %. Combined with three-dimensional flow field analysis, this study explores the essential physical mechanisms underlying energy harvesting performance enhancement. The analysis of vortex vector plots, boundary-layer separation velocities, and differential pressure distributions has revealed the mechanisms of aerodynamic improvement. Subsequent application tests confirm the wind energy harvester's reliability for low-power electronics.

灵感来自鸟类的翅膀和独特的流线型鱼的身体，这个手稿介绍了一个风能收割机具有两个对称的仿生流线型装饰。推导了理论框架，并通过数值模拟和风洞试验进行了验证。采用风洞试验研究了压电气动弹性能量收集器的特性，该收集器在长方体钝体表面对称地安装了两个流线型装饰物。不同的厚弦比（TCr）、装饰物的位置和hb/DB （hb为装饰物的高度，DB为长方体壁体的直径）使风能采集器呈现出不同的振动模式：涡激振动（VIV）和飞奔振动。在风速为5 m/s时，C-M-0.5的最大有效值输出电压比长方体断崖体提高了82.4%，而C-M-0.2和C-B-0.3的临界飞驰风速降低了15.38%。结合三维流场分析，本研究探讨了能量收集性能增强的基本物理机制。对涡矢量图、边界层分离速度和压差分布的分析揭示了气动性能改善的机理。随后的应用测试证实了风能采集器在低功率电子设备上的可靠性。

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引用次数: 0

Special dynamic response characteristics of jumper compared to long-span overhead transmission lines subject to winds 跨接线与大跨架空输电线路在风作用下的特殊动态响应特性

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-08 DOI: 10.1016/j.jweia.2025.106298

Weizheng Zhou , Wenjuan Lou , Yuelong Zhang , Rong Bian

The jumper is a connected conductor to route the long span transmission line (TL) around the metal tower. The physical parameters of jumper and TL are nearly the same, except that the span of jumper is generally about 10–15 m, less much than the TL. Considering the rising wind-induced flashover accidents of jumper compared to the TL, it is meaningful to figure out the reasons why the jumper is vulnerable to wind-induced flashover, and help to improve existing jumper structures. Three potential factors are proposed, including the resonant response, the non-Gaussian wind, and the short-rise-time gust. A model of transmission line system included the jumper is established and various methods are used to give a thorough analysis on the root cause of the different wind-induced dynamic responses exhibited by the TLs and jumpers subject to winds. The results show that the aerodynamic damping ratio of jumper is less than half of TL's, which makes a greater than 50 % increment of the dynamic response by the resonant response at the suspension insulator string for jumper. Moreover, the jumper is more sensitive to the upstream wind and are easily affected by the non-Gaussian wind and the short-rise-time wind than TLs. Based on theoretical derivation, the modified formula of the gust response factor for jumper is proposed to help the wind-resistance design. In general, more caution on the wind-resistance design for the flexible jumper structure is required to avoid becoming the weakness in the transmission line system during wind disasters.

跳线是将大跨距输电线路绕金属塔布线的连接导体。跨接线与跨接线的物理参数基本相同，只是跨接线的跨度一般在10-15 m左右，比跨接线要小。考虑到跨接线的风闪事故相对于跨接线有所上升，找出跨接线易受风闪的原因，对改进现有跨接线结构具有重要意义。提出了共振响应、非高斯风和短上升时阵风三个潜在影响因素。建立了包含跳线的输电线路系统模型，并采用多种方法深入分析了在风作用下跳线和跳线所表现出的不同风致动力响应的根本原因。结果表明，跳线的气动阻尼比小于TL的一半，这使得跳线在悬架绝缘子串处的谐振响应增加了50%以上的动态响应。跳线对上游风较为敏感，易受非高斯风和短升时风的影响。在理论推导的基础上，提出了跳线阵风响应系数的修正公式，以帮助跳线抗风设计。一般情况下，柔性跳线结构的抗风设计应更加谨慎，以免成为风灾时输电线路系统的软肋。

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引用次数: 0

Simulation of non-stationary winds in typhoon field based on turbulent coherent structure and AR-GARCH model 基于湍流相干结构和AR-GARCH模型的台风场非平稳风场模拟

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-06 DOI: 10.1016/j.jweia.2025.106302

Xigui Huang , Shangxin Chen , Teng Wu , Gang Hu , Chao Li , Wujian Long , Lixiao Li

A key challenge in simulating nonstationary wind speeds lies in accurately modeling the time-varying mean wind speeds and/or the standard deviation of the fluctuating wind components. This difficulty is primarily due to limited understanding of the mechanisms and evolutionary characteristics of wind speed nonstationary, which can currently only be described statistically in the time-frequency domain. In this study, ten sets of field-measured wind speed data from five typhoon events were analyzed to extract turbulent coherent structures, which are generally regarded as intrinsic drivers of wind nonstationarity. Their spatial and temporal distributions, as well as their evolution within typhoon wind fields, were systematically examined. Based on these insights, a simulation method for nonstationary typhoon wind speeds was proposed. Specifically, all datasets were decomposed into nonstationary coherent structure components and stationary fluctuating wind components. The parameters of an autoregressive generalized autoregressive conditional heteroskedasticity (AR-GARCH) model and a normalized spectral model were then fitted separately to these decomposed components. The simulated results were evaluated using the cumulative distribution function, cumulative normalized arias intensity, and power spectral density. The results show that the proposed method can effectively reproduce the time-frequency characteristics of measured nonstationary wind speeds associated with typhoon events.

模拟非平稳风速的一个关键挑战在于准确地模拟随时间变化的平均风速和/或波动风分量的标准偏差。这一困难主要是由于对风速非平稳的机制和演化特征的理解有限，目前只能在时频域进行统计描述。本文分析了5次台风的10组实测风速数据，提取了湍流相干结构，这些湍流相干结构通常被认为是风非平稳性的内在驱动因素。系统地研究了它们的时空分布及其在台风风场中的演变。在此基础上，提出了一种非平稳台风风速的模拟方法。具体而言，所有数据集都被分解为非平稳相干结构分量和平稳波动风分量。然后对分解后的分量分别拟合自回归广义自回归条件异方差（AR-GARCH）模型和归一化谱模型的参数。利用累积分布函数、累积归一化咏叹调强度和功率谱密度对模拟结果进行评价。结果表明，该方法能有效再现与台风事件相关的实测非平稳风速的时频特征。

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引用次数: 0

Flutter uncertainty analysis of flexible photovoltaic support structure considering stochastic aerodynamic and structural parameters 考虑随机气动和结构参数的柔性光伏支撑结构颤振不确定性分析

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-04 DOI: 10.1016/j.jweia.2025.106300

Rui Zhou, Zidong Xu, Hao Wang, Yun Liu, Jiahao Nie

Flexible photovoltaic support structures (FPSS) are highly susceptible to wind-induced flutter due to their low mass, low stiffness, and thin-plate-like cross-sections. Traditional deterministic flutter analyses, which overlook the inherent uncertainties of the dynamic system, are insufficient for effectively quantifying the risk of flutter instability. In this work, the advanced probability density evolution method is introduced for uncertainty propagation analysis of flutter in FPSS, where wind speed is treated as a generalized time variable in the probability density evolution equation. Considering the uncertainties in key aerodynamic and structural parameters, and the Karhunen–Loève expansion is employed to reduce the dimensionality of the flutter derivative random processes. Subsequently, a full-order flutter analysis is performed on a typical three-cable-supported FPSS. Results indicated that the dispersion of the modal damping ratio and frequency increases with wind speed, with the torsional mode exhibiting a multi-peak distribution in both damping ratio and frequency. The probabilistic flutter critical wind speed, determined based on the 99 % confidence level, is 7 % lower than the deterministic value. The

A_{1}^{*}

and the structural damping ratio are the most influential aerodynamic and structural parameters, respectively, in affecting the probability distribution of the flutter critical wind speed.

柔性光伏支撑结构（FPSS）由于其低质量、低刚度和薄板状截面，极易受到风致颤振的影响。传统的确定性颤振分析忽略了动力系统固有的不确定性，不足以有效地量化颤振失稳风险。本文将先进的概率密度演化方法引入FPSS颤振不确定性传播分析，将风速作为概率密度演化方程中的广义时间变量。考虑关键气动参数和结构参数的不确定性，采用karhunen - lo展开法对颤振导数随机过程进行降维。随后，对典型的三索支撑FPSS进行了全阶颤振分析。结果表明：阻尼比和频率的频散随风速增大而增大，扭转模态在阻尼比和频率上均呈多峰分布；基于99%置信水平确定的概率颤振临界风速比确定值低7%。A1 *和结构阻尼比分别是影响颤振临界风速概率分布的最大气动参数和结构参数。

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引用次数: 0

Wind tunnel investigation of aerodynamic interactions between twin high-rise buildings connected by a skybridge at varying installation heights 由天桥连接的两座高层建筑在不同安装高度下的空气动力学相互作用的风洞研究

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-04 DOI: 10.1016/j.jweia.2025.106296

Min Kyu Kim , Thomas H.-K. Kang

A modular wind tunnel model was developed and validated to examine the aerodynamic behavior of twin high-rise buildings connected by a skybridge. The model allowed adjustable bridge heights while maintaining geometric accuracy, and its reliability was confirmed through comparison with published data. Wind tunnel tests across eleven bridge height configurations assessed both global aerodynamic responses and local surface pressures. Results showed that adding a skybridge slightly reduced fluctuating lift and torsional base moments of the buildings, indicating potential aerodynamic benefits for structural design. However, aerodynamic loads on the skybridge increased with height, peaking when placed at roof level. Local pressure measurements between the facing building surfaces revealed significant amplification in both mean and fluctuating components. Cross-correlation analysis identified strong negative coupling of crosswind forces between upstream and downstream buildings, while aerodynamic interaction with the skybridge remained limited. Overall, the skybridge demonstrated a dual aerodynamic role, moderately mitigating building responses yet introducing higher local loads. The validated modular approach offers a robust and adaptable framework for future parametric studies and supports data-driven aerodynamic optimization and skybridge placement in tall building systems.

建立并验证了模块化风洞模型，以研究由天桥连接的双座高层建筑的空气动力学行为。该模型可以在保持几何精度的同时调节桥梁高度，并通过与公开数据的比较证实了其可靠性。风洞试验跨越11个桥梁高度配置，评估了整体空气动力学响应和局部表面压力。结果表明，增加天桥可以略微降低建筑物的波动升力和扭转基础矩，表明结构设计可能具有气动效益。然而，天桥上的空气动力载荷随着高度的增加而增加，当放置在屋顶水平时达到峰值。建筑物表面之间的局部压力测量显示，平均分量和波动分量都有显著的放大。相互关联分析表明，上游和下游建筑之间的侧风力存在强烈的负耦合，而与天桥的空气动力学相互作用仍然有限。总的来说，天桥展示了双重空气动力学作用，适度减轻了建筑物的反应，但引入了更高的局部负荷。经过验证的模块化方法为未来的参数研究提供了一个强大的、适应性强的框架，并支持数据驱动的空气动力学优化和高层建筑系统中的天桥布置。

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引用次数: 0

An analytical model for boundary layer wind velocity profiles of landfalling typhoons based on field measurements 基于实测的登陆台风边界层风速廓线分析模型

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-04 DOI: 10.1016/j.jweia.2025.106301

Xigui Huang , Shengchang Luo , Chulong Yuan , Gang Hu , Chao Li , Lixiao Li

Low-level jets (LLJs) below 100 m height are frequently observed in typhoon boundary layer wind through field measurements. However, their occurrence patterns and characteristics remain inadequately quantified. Existing empirical wind profile models (e.g. power-law model, log-law model, Vickery model) often fail to capture the full vertical structure of typhoon winds, particularly in the near-surface layer where deviations are significant due to the influence of low-level jets. This study presents a comprehensive analysis of boundary layer wind profiles based on field measurements from multiple landfalling typhoons across various surface exposure categories, typhoon structural partitions and wind speed ranges. Statistical analyses indicate that LLJs are more prevalent under high wind speeds within the back eyewall region. In response, an analytical wind profile model is proposed that accounts for the LLJ phenomenon and the reverse “C”-shaped vertical profile typical of typhoon wind fields. Empirical formulations for model parameters were developed as a function of the 10m reference height wind speed(U₁₀), calibrated through nonlinear regression. The proposed model demonstrates improved accuracy in replicating measured typhoon wind profiles compared to conventional models. Validation with representative typhoon events confirms the model's applicability and robustness for engineering wind load assessments in typhoon-prone regions.

通过实地测量，在台风边界层风中经常观测到高度低于100米的低空急流。然而，它们的发生模式和特征仍然没有得到充分的量化。现有的经验风廓线模型（如幂律模型、对数律模型、维克里模型）往往不能捕捉台风风的完整垂直结构，特别是在近地面层，由于低空急流的影响，偏差很大。本研究基于多个登陆台风在不同地表暴露类别、台风结构分区和风速范围的实地测量，对边界层风廓线进行了综合分析。统计分析表明，在高风速条件下，后眼壁区域内llj更为普遍。为此，提出了考虑LLJ现象和台风风场典型的反“C”型垂直廓线的解析风廓线模型。模型参数的经验公式是10米参考高度风速（U10）的函数，并通过非线性回归进行校准。与传统模式相比，所提出的模式在模拟台风风廓线的准确度有所提高。具有代表性的台风事件验证了该模型对台风易发地区工程风荷载评估的适用性和鲁棒性。

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引用次数: 0