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津秦高速铁路沿线风况特征

孙玫玲1,张赛2,马京津2   

  1. (1天津市气象服务中心, 天津 300074;2北京智融天象科技有限公司, 北京 100089)
  • 出版日期:2019-11-10 发布日期:2019-11-10

Characterization of the wind regime along Tianjin-Qinhuangdao High-speed Railway.

SUN Mei-ling1, ZHANG Sai2, MA Jing-jin2   

  1. (1Tianjin Meteorological Service Center, Tianjin 300074, China; 2Beijing Smartclimate Technology Co. Ltd, Beijing 100089, China).
  • Online:2019-11-10 Published:2019-11-10

摘要: 大风是影响铁路运输安全的主要气象灾害,强风导致的铁路灾害是影响铁路安全运行的重要因子之一。本文基于2009—2018年的津秦铁路沿线气象站资料和历史典型大风天气过程的中尺度模式模拟两种方式,分析津秦高铁沿线大风特征,识别沿线受风灾威胁严重的路段。结果表明:津秦高铁沿线大风频率和强度具有明显的季节差异,春季相比于其他季节大风频率和强度均最高;气象站历史资料分析表明,位于天津滨海的西南—东北走向铁路段、位于唐山市东部的自西向东铁路段属于受风灾威胁较大的段路,典型大风天气的风场模拟结果与历史资料分析所识别的危险段路基本一致;津秦高铁沿线区域春冬季的主风向为西北风,夏季的主风向为东南风,均与津秦高铁西南—东北走向铁路段呈直角,因此列车受横风影响会加剧该段线路的运行风险。

关键词: 玉米, 播期, 籽粒灌浆特性

Abstract: Severe wind disaster is one of the most important factors affecting the operation of high-speed trains. Herein, two methods are used to conduct risk assessment alongside the Tianjin-Qinhuangdao High-speed Railway with the aim to identify high-risk areas. One is based on the historical observation data from the meteorological stations along the railway during 2009-2018, while the other one is the high-resolution WRF (Weather Research and Forecasting) simulation of processes regarding the typical severe wind weather during the same period. The results showed that there is an obvious seasonal variation of the wind risk along the railway. In addition to the wind intensity that reaches the highest in spring, the wind frequency ranks the first in spring as well, followed by winter and obviously higher than that in summer and autumn. The analysis based on observation data of meteorological stations revealed several high-risk areas: the railway section located in Tianjin Binhai running from southwest to northeast and that located in eastern Tangshan running from west to east. These railway sections are identified also by the WRF simulation of severe wind weather processes, suggesting that the result of WRF simulation is well in line with that from observation data of meteorological stations. The main wind direction along the Tianjin-Qinhuangdao High-speed Railway is northwest in spring and winter and southeast in summer when the wind is at a right angle to the railway section located in Tianjin Binhai. Due to the influence of crosswind on the train, the operational risk of this railway section will be increased under these severe wind conditions.

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