Method and system for determining train running safety threshold value under coupling of wind, vehicle, road, network, wall and terrain

Abstract

The invention discloses a method and system for determining the train running safety threshold value under coupling of wind, vehicle, road, network, wall and terrain, and therefore the problem that due to the fact that at present, a train overturning coefficient serves as the only criterion for judging wind area driving safety, various influence factors in the actual environment can not be comprehensively considered. The method includes the steps of firstly, determining a first relational expression between the wind speed and a vehicle speed under the state that the road condition, the vehicle type and load, the wind speed and direction and the vehicle speed are coupled, a second relational expression between the critical wind speed and a vehicle speed under the train liter weight ratio critical state, and a third relational expression between the critical wind speed and a vehicle speed under the state that a bow network loses efficacy due to wind-induced network deviation; secondly, obtaining and comparing three vehicle speeds according to the current wind speed during train running and according to the three relational expressions, wherein the minimum vehicle speed is the train running safety threshold value under the environment where a current wind factor, a current vehicle factor, a current road factor, a current network factor, a current wall factor, a current terrain factor and the like are coupled. In this way, the train running safety threshold value determined through the method is closer to the actual environment of train running, and higher reference value is provided for selection of the train running speed.

Description

technical field [0001] The invention belongs to the technical field of rail transit safety, and in particular relates to a method and system for determining a safety threshold of train operation under the coupling of windmill road network wall terrain. Background technique [0002] Since the train was introduced into our country as a means of transporting goods and carrying passengers in the 1870s, it has always been accompanied by accidents. In windy areas, high winds can cause serious train accidents. [0003] Northwest China has an obvious continental climate, affected by the southward cold current from Siberia and the Ural Mountains, with frequent strong winds, high wind speeds and long wind periods. The windy areas such as "Bailifeng District" and "Thirty Lifengkou" that the Lanzhou-Xinjiang Railway passes through in Xinjiang are among the regions with the largest inland wind speed in the world. The highest wind speed in history exceeds 64m / s, and the average annual nu...

AI Technical Summary

Problems solved by technology

However, in the prior art, there is no comprehensive consideration of critical conditions such as train overturning, car body lift-to-weight ratio exceeding limit instability, and wind-induced grid deflection leading to pantograph-catenary failure to determine the safety threshold of train operation.

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