Study on characteristics of a crashworthy high-speed train nose

Tehrani, Parisa Hosseini; Nankali, Amir

doi:10.1080/13588260903094418

Cited by 32 publications

(16 citation statements)

References 10 publications

(10 reference statements)

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“…At present, many researches mainly focus on the crashworthy vehicles of trunk-railway [6,[11][12][13]23,31]. The research on the crashworthiness, strength and vibrational features of an aluminium railroad passenger car indicated that the stress values, natural frequencies and crashworthy characteristics of the aluminium structure were within the acceptable tolerances, but the final aluminium design was about one-third of the weight of the initial steel structure [4].…”

Section: Introductionmentioning

confidence: 98%

“…The design of, and research into, crashworthy vehicles have become important issues around the world [6,8,12,13]. By improving the crashworthiness of passenger compartments, as well as setting energy-absorption devices and anti-climbing devices on specific railway vehicles [21,25], it is expected that most of the impact's kinetic energy can be absorbed and vehicle over-climbing can be avoided in the event of a collision.…”

Section: Introductionmentioning

confidence: 99%

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Research on the crashworthy structures of subway vehicles

Xie

Zhou

2013

International Journal of Crashworthiness

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Based on the characteristic of subway vehicles, the design concept of crashworthy subway vehicle was proposed and the energy-absorbing process of the head car (HC) impact was divided into four steps: the first step is the buffer of the coupler draft gear, the second is the deformable collapsible tube, the third is the coupler shear bolts and the last is the energyabsorption structures. According to the impact analysis of a square thin-walled structure, the energy-absorption structures were designed. Through the impact simulation of the designed structure, it clearly shows that steady and ordered plastic deformation occurs on the structure from anticipative part, and the impact force is relatively steady. During the process of impacting, the structures can absorb 471.68 kJ energy, which is far more than the 271.27 kJ impact energy that should be absorbed by the HC when an AW0 loading train at 25 kph strikes another stationary AW0 loading train. The law researches on the designed structures show that their energy-absorbing properties are only closely related to the structural inherent attributes, which indicates that they can be greatly applied to subway vehicles. Finally, from the correlative analysis between impacting experiment and numerical simulation, it is indicated that the validity and reliability of numerical simulation are verified by the experiment, and it is feasible to design and optimise the energy-absorption structures through numerical calculation.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Research on the crashworthy structures of subway vehicles

Xie

Zhou

2013

International Journal of Crashworthiness

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“…the expansion tube has long-stroke, stable deformation mode and high specific energy-absorption capacity [7], [8]. Moreover, the expansion force of the tube is controllable and stable [9]- [11].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response and Energy Absorption Characteristics of Expansion Tubes Under Axial Impact

Zhang

Lin

et al. 2020

IEEE Access

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The expansion tube is normally used in impact-resistant components, owing to the stable expansion force, and high specific energy-absorption capacity. This paper reports the deformation mechanism and energy absorption characteristics of expansion tube subject to impact velocity ranging from 0.083 m/s to 48.84 m/s. The effects of cone piston semi angle, tube wall thickness, and impact velocity on expansion tube performance were studied via experimental measurements and numerical modeling. The mechanical responses of the expansion tube were measured using a universal gas gun setup. The energy absorption capacity of the expansion tube absorber was identified to be different under quasi-static and dynamic compressions. The dynamic expansion force is lower than the quasi-static expansion force, which is about 62.2%-76.6% of the static expansion force, but the deformation mechanisms of the tube under quasi-static loading and dynamic impact are same. A finite element numerical model was built and validated with the experimental data. The finite element predictions were in good agreement with the experimental measurements. It was shown that the decrease in the friction coefficient is the main reason for the dynamic expansion force lower than the quasi-static expansion force. The influence of cone piston semi angle and tube wall thickness are significant on the energy absorption capacity of the tube. The dynamic expansion response does not change significantly when the impact velocity is less than 50 m/s. Under dynamic impact, the change of energy absorption efficiency is negligible, and the plastic deformation energy is about 64%-71.5% of the total kinetic energy of striker. INDEX TERMS Dynamic impact, energy absorption characteristics, expansion response, expansion tubes, friction coefficient.

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“…The responses and locations of weakness of the head vehicle and the middle vehicles in the same collision scenarios were compared, and three different collision behaviours of the head and middle vehicle were obtained, including different collision interfaces, different body structures and different collision sequences; structural improvement schemes were also investigated in their research (Xue et al 2007). Hosseini-Tehrani and Nankali (2010) noted that the head design of a high-speed train should not only consider the aerodynamic performance and noise but also the crashworthiness. The crashworthiness of 19 different internal/external structures and the sizes of head forms were systematically analysed.…”

Section: Introductionmentioning

confidence: 99%

Crashworthiness Analysis of the Structure of Metro Vehicles Constructed From Typical Materials and the Lumped Parameter Model of Frontal Impact

Zhu

Xiao

et al. 2019

Transport

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This paper establishes a Finite Element (FE) model of a rigid barrier impact of a single vehicle constructed from carbon steel, stainless steel, and aluminum alloy, which are three typical materials used in metro vehicle car body structures. The different responses of the three materials during the collision are compared. According to the energy absorption, velocity, deformation and collision force flow characteristics of each vehicle, the relationship between the energy absorption ratio of the vehicle body and the energy absorption ratio of its key components is proposed. Based on the collision force flow distribution proportion of each component, the causes of the key components’ deformation are analysed in detail. The internal relationship between the deformation, energy absorption and impact force of the key components involved in a car body collision is elucidated. By determining the characteristic parameters describing the vehicle’s dynamic stiffness, a metro vehicle frontal impact model using lumped parameters is established that provides a simple and efficient conceptual design method for railway train safety design. These research results can be used to guide the design of railway trains for structural crashworthiness.

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Study on characteristics of a crashworthy high-speed train nose

Cited by 32 publications

References 10 publications

Research on the crashworthy structures of subway vehicles

Research on the crashworthy structures of subway vehicles

Dynamic Response and Energy Absorption Characteristics of Expansion Tubes Under Axial Impact

Crashworthiness Analysis of the Structure of Metro Vehicles Constructed From Typical Materials and the Lumped Parameter Model of Frontal Impact

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