Wind-Induced Accidents of Train/Vehicles and Their Measures in Japan.

Fujii, Toru; Maeda, Tsuyoshi; Ishida, Hiroaki; Imai, Toshiaki; Tanemoto, Katsuji; Suzuki, Minoru

doi:10.2219/rtriqr.40.50

Cited by 73 publications

(40 citation statements)

References 1 publication

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“…Under strong winds, to improve train operational safety and railway transportation efficiency, a conventional approach is to build windbreak walls (Baker 1986, Fauchier et al 1999, Fujii et al 1999, Bocciolone et al 2008, Tomasini et al 2015, Wang et al 1990, Liu 2006, Zhang and Liu 2012. In Europe and Japan, the windbreak walls that are made of perforated steel sheets are just straight with very thin thickness and uniform porosity.…”

Section: Nomenclaturementioning

confidence: 99%

Shape Optimization of a Kind of Earth Embankment Type Windbreak Wall along the Lanzhou-Xinjiang Railway

Zhang¹,

Gao²,

Liu³

et al. 2017

JAFM

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In order to promote the windbreak effect of the earth embankment type windbreak wall, enhance the operational speed of the single passenger train and improve the quality of the pantograph-catenary current collection for a locomotive, a three-dimensional RANS turbulence model k-epsilon was used to optimize the shape of windbreak walls. The relationships between the overturning moment of trains, the lateral wind speed at the catenary position and the height (depth) in optimization projects were analyzed. Validation was performed against full-scale experimental data. To understand the flow field around the train with different types of windbreak walls, pressure contours and surface pressure coefficient distributions were investigated. The results show that for the original type windbreak wall, the overturning moment of the passenger car is a little larger. However, for the optimization projects, the trains are basically in a minor negative pressure environment and the aerodynamic forces are much less. The optimal heights of the heightening type (depths for the cutting type) do not change obviously as the train speed increases. When the passenger car stands on the track without movement, the optimal height/depth is the smallest. Behind the original type's windbreak wall, the lateral wind speed at the catenary position on the leeward line is less than that on the windward line. Meanwhile, as the train runs on the windward or leeward lines, the corresponding lateral wind speed rise sharply by 37.5% and 40.5%, respectively. After the adoption of optimized projects, the speeds of the two lines monotonically decrease. The best height of the heightening type is 0.30 m, and the optimal depth of the cutting type is 1.40 m. From the perspective of engineering application, the heightening type is a more suitable project.

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Section: Nomenclaturementioning

confidence: 99%

Shape Optimization of a Kind of Earth Embankment Type Windbreak Wall along the Lanzhou-Xinjiang Railway

Zhang¹,

Gao²,

Liu³

et al. 2017

JAFM

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“…There have been several train safety incidents due to strong wind which caused ________________________ Institute of Science & Technology of Urumqi Railway Administration, Urumqi 830011, China immeasurable loss of passenger property and life safety [2][3] . In order to ensure the safe operation of the railway in Nanjiang Railway, Urumqi Railway Administration has set up 17 wind monitoring station along the first 100 km wind area.…”

Section: Introductionmentioning

confidence: 99%

Analysis on Wind Field Characteristics of the First Hundred Kilometers of Wind Area along Nanjiang Railway

Yan¹

2017

dtetr

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The wind data in wind monitoring point of 2015, 2016 Nanjiang Railway of first 100 km are selected for analysis of wind field characteristics. The results show that the wind level is relatively high and the duration is relatively long in the first 100 km wind area of Nanjiang Railway. The maximum instantaneous wind speed can reach 61.2 m/s, and the wind direction is mostly concentrated between WNW-NNW. The average wind speed, average wind direction, turbulence intensity and gust factor are analyzed by choosing the data of wind monitoring points in typical gale weather, the results show that the weather fluctuation is strong, and the high level of wind duration is long.

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“…Four people were killed, and more than 30 were injured. To date, more than 30 strong-crosswind-induced accidents have been reported in Japan (Fujii et al, 1999;Gawthorpe, 1994). Most of these accidents occurred on narrow-gauge tracks (Fujii et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…Three characteristics of high-speed trains, i.e., their lightweight construction, high driving velocities, and distributed traction (Fujii et al, 1999), have significant influences on their operational safety when subjected to crosswinds. In recent years, the crosswind safety of railway vehicles has been of great interest to researchers and railway industries.…”

Section: Introductionmentioning

confidence: 99%

Study on the safety of operating high-speed railway vehicles subjected to crosswinds

Xiao

Ling

Xiong

et al. 2014

J. Zhejiang Univ. Sci. A

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Abstract:A coupled vehicle-track dynamic model is put forward for use in investigating the safety effects of crosswinds on the operation of a high-speed railway vehicle. In this model, the vehicle is modeled as a nonlinear multi-body system, and the ballasted track is modeled as a three-layer discrete elastic support system. The steady aerodynamic forces caused by crosswinds are modeled as ramp-shaped external forces being exerted on the vehicle body. This model was used in a numerical analysis of the dynamic response and dynamic derailment mechanisms of high-speed vehicles subjected to strong crosswinds. The effects of the crosswind speeds, crosswind attack angle, and vehicle speed on the operational safety of the vehicle were examined. The operational safety boundaries of a high-speed vehicle subjected to crosswinds were determined. The numerical results obtained indicate that crosswinds at attack angles of 75° to 90° with respect to the forward direction of the vehicle have a great influence on the safety of operating high-speed railway vehicles. The wheelset unloading limit, which determines the position of the warning boundary dividing the safe operating area and the warning area, is the most conservative, i.e., the safest, criterion to use in assessing the high-speed operational safety of vehicles in crosswinds.

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Wind-Induced Accidents of Train/Vehicles and Their Measures in Japan.

Cited by 73 publications

References 1 publication

Shape Optimization of a Kind of Earth Embankment Type Windbreak Wall along the Lanzhou-Xinjiang Railway

Shape Optimization of a Kind of Earth Embankment Type Windbreak Wall along the Lanzhou-Xinjiang Railway

Analysis on Wind Field Characteristics of the First Hundred Kilometers of Wind Area along Nanjiang Railway

Study on the safety of operating high-speed railway vehicles subjected to crosswinds

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