High-speed train overturning safety under varying wind speed conditions

Liu, Dongrun; Wang, Tiantian; Liang, Xifeng; Shi, Meng; Zhong, Mingjun; Zhang, Lu

doi:10.1016/j.jweia.2020.104111

Cited by 45 publications

(10 citation statements)

References 15 publications

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“…Gao et al 19 conducted a full-scale test on the pressure of high-speed streamlined trains under crosswinds, evaluated the influence of different crosswinds on the load, and analyzed the mean value and fluctuation law of the transverse force coefficient, lift coefficient and roll moment coefficient under different yaw angles. Liu et al 20 established a crosswind model based on the measured wind speed curve, studied the impact of single and continuous wind speed changes on train dynamics, performed parameter analysis of the wind speed change rate, maximum wind speed duration and amplitude wind speed changes, and proposed an estimation method for the wind speed range for safe train operation under sudden changes in wind speed. Bell et al 21 proposed a wind tunnel method for slipstream assessment and analyzed the influence of simulated ballast and track or flat ground on the wake structure.…”

Section: Introductionmentioning

confidence: 99%

Influence of air intake from existing shafts on the safety of operating trains

Huang,

Li,

Zhang

et al. 2024

Sci Rep

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Given the influence of air intake from inclined shafts in existing tunnel ventilation systems on train comfort and aerodynamic safety, a numerical analysis method is used to study the comfort and aerodynamic safety of operating trains under three conditions—inclined shaft closed and inclined shaft open without and with air intake—and to explore the variation law of transient pressure and aerodynamic force (lift coefficient, transverse force coefficient, and overturning moment coefficient). Combined with practical engineering and requirements, the influence of inclined shaft air intake on train operation comfort and aerodynamic safety is analyzed. Through this research, the influence of using air intake from the inclined shaft of an existing tunnel, a ventilation scheme of the new Wushaoling Tunnel, on the comfort and aerodynamic force of trains is revealed, and the comfort and aerodynamic safety of trains in an actual project are evaluated, verifying the rationality of the ventilation scheme of the Wushaoling Tunnel.

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Section: Introductionmentioning

confidence: 99%

Influence of air intake from existing shafts on the safety of operating trains

Huang,

Li,

Zhang

et al. 2024

Sci Rep

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“…Safety is the main research focus in the railway field [ 1 , 2 , 3 ]. As vital components affecting the safety of running trains, bolts have always been the key detection units in railways [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Scattered Train Bolt Point Cloud Segmentation Based on Hierarchical Multi-Scale Feature Learning

Zeng

Gao

et al. 2023

Sensors

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In view of the difficulty of using raw 3D point clouds for component detection in the railway field, this paper designs a point cloud segmentation model based on deep learning together with a point cloud preprocessing mechanism. First, a special preprocessing algorithm is designed to resolve the problems of noise points, acquisition errors, and large data volume in the actual point cloud model of the bolt. The algorithm uses the point cloud adaptive weighted guided filtering for noise smoothing according to the noise characteristics. Then retaining the key points of the point cloud, this algorithm uses the octree to partition the point cloud and carries out iterative farthest point sampling in each partition for obtaining the standard point cloud model. The standard point cloud model is then subjected to hierarchical multi-scale feature extraction to obtain global features, which are combined with local features through a self-attention mechanism, while linear interpolation is used to further expand the perceptual field of local features of the model as a basis for segmentation, and finally the segmentation is completed. Experiments show that the proposed algorithm could deal with the scattered bolt point cloud well, realize the segmentation of train bolt and background, and could achieve high segmentation accuracy, which has important practical significance for train safety detection.

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“…Plenty of research works have been carried out on the HST crosswind safety assessment under different classical operation scenarios, such as tunnel, windbreak breach, bridge, embankment. 1,[3][4][5] It has been shown that the strong crosswind can cause train derailment and even overturning, which greatly threatens the safe operation of HSTs. In fact, the train overturning accidents owing to strong crosswind have been reported in many countries.…”

Section: Introductionmentioning

confidence: 99%

“…On the one hand, the growing trend of lighter carbody, and higher operation speed will directly deteriorate the crosswind-induced ride comfort and safety issues of HSTs. On the other hand, some high-speed railways are frequently disturbed by extreme weather around the world, such as the Lanzhou-Xinjiang high-speed railway 1 and the Sichuan-Tibet Railway (an extremely challenging project under construction 2 ) in China. Plenty of research works have been carried out on the HST crosswind safety assessment under different classical operation scenarios, such as tunnel, windbreak breach, bridge, embankment.…”

Section: Introductionmentioning

confidence: 99%

An active suspension system for enhancing running safety of high-speed trains under strong crosswind

Zhang,

Ling,

Zhai

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part F:

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The running safety of trains subjected to strong crosswinds has become a major concern for the high-speed railways passing through complicated mountain areas. This paper reports an active secondary suspension system to improve the operation stability and running safety of high-speed trains under strong crosswind. The goal of the active suspension system is to regulate the lateral, yaw, and roll motion attitudes of high-speed train carbody, in which a controller is designed by combining with a disturbance observer and the sliding mode control method. To further verify the proposed active suspension strategy, a crosswind-vehicle-track coupled dynamics model is established, where the unsteady aerodynamic loads and random track irregularity excitations are considered. The results show that the proposed active suspension system has the efficient potential to regulate the carbody motion attitudes and enhance the anti-rolling performance of high-speed trains. In comparison to a quasi-static control strategy of active suspension, the use of the proposed active suspension system has led to a significant reduction in both wheel-load reduction ratios and derailment risks of high-speed trains.

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High-speed train overturning safety under varying wind speed conditions

Cited by 45 publications

References 15 publications

Influence of air intake from existing shafts on the safety of operating trains

Influence of air intake from existing shafts on the safety of operating trains

Scattered Train Bolt Point Cloud Segmentation Based on Hierarchical Multi-Scale Feature Learning

An active suspension system for enhancing running safety of high-speed trains under strong crosswind

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