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Determination method of load balance ranges for train operation safety under strong wind

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Abstract

The aerodynamic performances of a passenger car and a box car with different heights of windbreak walls under strong wind were studied using the numerical simulations, and the changes of aerodynamic side force, lift force and overturning moment with different wind speeds and wall heights were calculated. According to the principle of static moment balance of vehicles, the overturning coefficients of trains with different wind speeds and wall heights were obtained. Based on the influence of wind speed and wall height on the aerodynamic performance and the overturning stability of trains, a method of determination of the load balance ranges for the train operation safety was proposed, which made the overturning coefficient have nearly closed interval. A min(|A 1|+|A 2|), s.t. |A 1|→|A 2| (A 1 refers to the downwind overturning coefficient and A 2 refers to the upwind overturning coefficient) was found. This minimum value helps to lower the wall height as much as possible, and meanwhile, guarantees the operation safety of various types of trains under strong wind. This method has been used for the construction and improvement of the windbreak walls along the Lanzhou-Xinjiang railway (from Lanzhou to Urumqi, China).

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Authors and Affiliations

  1. Key Laboratory of Traffic Safety on Track of Ministry of Education, School of Traffic and Transportation Engineering, Central South University, Changsha, 410075, China

    Hong-qi Tian  (田红旗)

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  1. Hong-qi Tian  (田红旗)
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Correspondence to Hong-qi Tian  (田红旗).

Additional information

Foundation item: Project(U1334203) supported by the National Natural Science Foundation of China

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Tian, Hq. Determination method of load balance ranges for train operation safety under strong wind. J. Cent. South Univ. 22, 1146–1154 (2015). https://doi.org/10.1007/s11771-015-2627-2

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  • DOI: https://doi.org/10.1007/s11771-015-2627-2

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