一种高铁沿线湖泊环境微地形风速修正方法

A wind speed correction method for micro terrain of lake environment along railway

为了实现微地形风场环境的精细化感知,保障高铁安全运行,开展了高铁沿线微地形风速修正研究。首先选取高铁目标站周边的气象参考站,从地统计学角度分析区域内阵风因子的分布特征及风速的变化特征;然后利用Copula函数对气压、气温、降水、相对湿度这4种气象要素与10 min平均风速进行相关性分析;最后提出了基于阵风因子和Copula函数协同多要素的湖泊环境微地形风速修正公式。结果表明:气温与风速呈正相关关系,相对湿度与风速呈负相关关系;所提风速修正方法对高铁沿线湖泊环境具有针对性,相较现有计算方法修正效果提升约20%。

The fine perception of micro terrain wind field environment is of great importance for the safe operation of high-speed railway.Herein,research on the micro terrain wind speed correction along high-speed railway has been carried out.Firstly,the meteorological reference stations around the high-speed railway target stations are selected to analyze the distribution characteristics of gust factors and the variation characteristics of wind speed in the region from the geostatistical perspective.Furthermore,Copula function is used to analyze the correlation between the four meteorological elements of air pressure,temperature,precipitation and relative humidity and the 10 min average wind speed.Finally,the wind speed correction formula of lake environment microtopography based on the synergetic multi factor of gust factor and Copula function is proposed.The results show that the air temperature and the relative humidity are positively and negatively correlated respectively with the wind speed.The proposed wind speed correction method is specially adaptable to the lake environment along the high-speed railway,and the correction effect is about 20%higher than that of the existing calculation methods.