| 李彦哲,李 刚,李宝学,牛建雄.强风环境下腕臂绝缘子雪晶沉积特性仿真分析[J].电子测量与仪器学报,2021,35(7):217-223 |
| 强风环境下腕臂绝缘子雪晶沉积特性仿真分析 |
| Simulation analysis of snow crystal deposition characteristics ofcantilever insulators in strong wind environment |
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| DOI： |
| 中文关键词: 腕臂绝缘子 沉积特性 有限元仿真 风速 风向 |
| 英文关键词:cantilever insulator deposition characteristics finite element simulation wind speed wind direction |
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| 摘要点击次数: 860 |
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| 中文摘要: |
| 中国铁路线大量分布在风区雪区,研究接触网腕臂绝缘子表面雪晶沉积特性,对预防冬季“雪闪”和提高供电可靠性有
重要意义。 利用有限元仿真软件模拟风速环境下 QBG-25 型铁路用绝缘子雪晶沉积量,计算绝缘子表面流场速度和静压分布,
分析雪晶类型和风速风向对绝缘子表面雪晶沉积的影响。 仿真结果表明,在相同风速风向下,雪晶类型对绝缘子表面雪晶沉积
量影响较小,其中实心枝状雪晶沉积量最大;绝缘子表面雪晶沉积量在平安装方式下随风速的增大而增大,斜安装方式下随风
速的增大呈现先增大后逐渐减小的趋势;当风速为 10 m/ s、风向在±45°范围内,绝缘子表面雪晶沉积量与风向关系呈现“V”型
分布,风向倾角为负角度时,安装方式对雪晶沉积量影响严重;伞裙表面雪晶沉积量随风向倾角的增大而增大,伞裙迎风面雪晶
沉积量大于伞裙背风面沉积量。 |
| 英文摘要: |
| Chinese railway lines are widely distributed in the windy and snowy areas. The study of the deposition characteristics of snow
crystal on the surface of the cantilever insulator is of great significance in preventing snow flash in the winter and improving the reliability
of power supply. In this paper, the finite element simulation software was used to simulate amount of snow crystal deposition of railway
insulators under wind speed. The velocity and static pressure distribution of flow field on insulator surface are calculated to analyze the
influence of wind speed, wind direction and snow crystal type on the surface deposition of insulators. The simulation results show that the
snow crystal type has little effect on the insulator amount of snow crystal deposition under the same wind speed and direction. Solid
dendritic snow crystal deposition is the largest. The amount of snow crystal deposition of insulator was installed horizontally increased
with the increase of wind speed and the amount of snow crystal deposition of insulator was installed obliquely increased first and then
decrease with the increase of wind speed, When the wind angle is negative, the installation method has a serious impact on the snow
crystal deposition. The relationship between amount of snow crystal deposition on the surface of insulator and wind direction presents a
“V”-shaped distribution when the wind speed was 10 m/ s and wind direction was within ±45°. The snow crystal deposition distribution
on the surface of shed increases with the increase of the wind direction, and the snow crystal deposition on the windward side of shed is
larger than that on the leeward surface of the shed. |
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