| In recent years,China’s high-speed railway has developed rapidly,so ensuring the safe operation of high-speed railway has become the top priority of high-speed railway operation.Gale is one of the main meteorological disasters affecting the safe operation of high-speed railway,which will cause train overturning or derailment.The gale alarm along the high-speed railway is based on the measured wind speed of the wind measuring points.However,the existing wind measuring stations in China are generally arranged at a spacing of 10 km,resulting in insufficient comprehensive monitoring in the gale section and too redundant monitoring in the small wind section,which will lead to problems such as untimely gale alarm and inappropriate early warning interval.Therefore,in order to solve the problems of insufficient refinement of the layout of wind measuring stations and waste of resources along the current high-speed railway,with the purpose of ensuring the safety of train operation and the goal of arranging the least stations on the premise of ensuring that the wind monitoring covers the whole section,this paper selects eastern high-speed rail line A and western high-speed rail line B as the representative of high-speed railway lines in plain areas and complex terrain.Aiming at the two high-speed railways,different wind measuring stations are adopted to optimize the layout plan.The specific contents are as follows:(1)Moran index analysis is used to study the spatial correlation of regional wind speed data,which provides a theoretical basis for the later use of spatial interpolation method.Six real railway stations are selected as the research object,IDW interpolation and Kriging interpolation are compared,and the most suitable spatial interpolation method of wind speed along the highspeed railway is determined according to the evaluation index.Then compare the four correction methods of Linear Regression,GBDT,XGBoost and DNN,and get the most suitable wind speed correction method according to the evaluation index.The experimental results show that Kriging interpolation method and XGBoost are the most suitable spatial interpolation method and correction algorithm for railway wind speed.(2)Aiming at eastern high-speed railway A,an optimization scheme of high-speed railway anemometer station layout in plain area is proposed.Firstly,the wind speed data of 31 wind measuring stations with a spacing of 10 km along the high-speed railway are simulated by Kriging interpolation,and the revised data are based on the meteorological stations with the highest similarity nearby.Then,the regional segments are divided according to the topographic elements and historical wind speed data,and the wind speed characteristics of each regional segment are determined.Finally,a plain similarity distribution function is proposed by combining the Similarity distance and Jaccard similarity coefficient.The experimental results show that the optimized wind measurement stations can more accurately characterize the characteristics of wind speed along the line.(3)Aiming at western high-speed railway B,an optimization scheme for the layout of wind measuring stations along the high-speed railway in complex terrain is proposed.Firstly,123 simulation stations are determined based on the intersection of 2km grid and railway line.After determining the auxiliary variables,the wind speed data of stations are simulated and corrected by collaborative Kriging interpolation.Then,based on SVR regression algorithm and landform,regional segments are divided,and the distribution characteristics of historical wind speed data in each segment are analyzed to determine the large and small wind speed segments.Finally,the altitude difference factor is introduced to improve the plain similarity station distribution function,and the complex terrain similarity station distribution function is proposed.The experimental results show that the optimized wind measuring stations along the high-speed railway can not only monitor the perfect wind conditions,but also save the economic cost,which provides a reference for the layout of wind measuring stations along the high-speed railway in complex terrain in the future. |
