紊流斜风作用下晶格角钢结构阻力系数计算方法研究

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-06-03 DOI:10.1016/j.jweia.2025.106134

Qi Zhou , Yakun Gao , Ledong Zhu , Jin Wang

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引用次数: 0

摘要

格塔作为输电线路的重要组成部分，对风荷载非常敏感。因此，在紊流偏斜风作用下精确测定晶格结构的阻力系数是至关重要的。本文主要研究了角钢格栅输电塔塔体的气动特性。通过风洞试验和CFD模拟，研究了不同风速、不同固度比、不同风场条件下晶格结构的气动力系数。通过对试验数据的回归分析，提出了一种新的格构结构歪斜风荷载系数计算公式。提出的公式与现行标准的建议进行了比较。此外，引入湍流影响因子和比角因子，量化了湍流强度对晶格结构阻力系数的影响。结果表明，新的斜风荷载系数计算与试验结果吻合较好，斜风荷载系数可由固度比导出。晶格结构的阻力系数随湍流强度的增大而增大。湍流影响因子和比角因子都能有效捕捉湍流强度对阻力系数的影响，并与湍流强度呈线性关系。

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Study on the calculation method of drag coefficient of lattice angle steel structure under turbulent skewed wind action

As a critical component of transmission lines, lattice towers are highly sensitive to wind loads. Accurate determination of the drag coefficient for lattice structures under turbulent skewed winds is therefore essential. This study focuses on the aerodynamic behavior of the tower body of an angle steel lattice transmission tower. Through wind tunnel tests and CFD simulations, the aerodynamic force coefficients of the lattice structure were investigated under different wind speeds, solidity ratios, and wind flow fields. A novel calculation formula for the skewed wind load factor of lattice structures was proposed through regression analysis of experimental data. The proposed formula was compared with recommendations from current standards. Additionally, turbulence influence factors and specific angle factors were introduced to quantify the effect of turbulence intensity on the drag coefficient of the lattice structure. The results indicate that the new skewed wind load factor calculation matches well with experimental results and the skewed wind factor can be derived from the solidity ratio. The drag coefficient of the lattice structure increases with rising turbulence intensity. Both the turbulence influence factors and specific angle factors effectively capture the effects of turbulence intensity on the drag coefficient, exhibiting a linear relationship with turbulence intensity.

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来源期刊

Journal of Wind Engineering and Industrial Aerodynamics 工程技术-工程：土木

CiteScore

8.90

自引率

22.90%

发文量

306

审稿时长

4.4 months

期刊介绍： The objective of the journal is to provide a means for the publication and interchange of information, on an international basis, on all those aspects of wind engineering that are included in the activities of the International Association for Wind Engineering http://www.iawe.org/. These are: social and economic impact of wind effects; wind characteristics and structure, local wind environments, wind loads and structural response, diffusion, pollutant dispersion and matter transport, wind effects on building heat loss and ventilation, wind effects on transport systems, aerodynamic aspects of wind energy generation, and codification of wind effects. Papers on these subjects describing full-scale measurements, wind-tunnel simulation studies, computational or theoretical methods are published, as well as papers dealing with the development of techniques and apparatus for wind engineering experiments.