A study on the frontal oblique collision-induced derailment mechanism in subway vehicles

Yao, Shuguang; Zhu, Huifen; Li, Mingyang; Xu, Ping; Che, Quanwei

doi:10.1177/0954409719852478

Cited by 8 publications

(4 citation statements)

References 29 publications

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“…However, these 2D contact-impact models between car bodies have limitations and may not be applicable in all scenarios. In 3D contact-impact models between car bodies, the automatic-surface-to-surface contact method is frequently adopted to detect and calculate the contact force in FE simulation [27,[51][52][53][54][55]. The nonlinear elastic-plastic spring force element provided by most commercial MBS software has been used to model the contact-impact between vehicle bodies [56][57][58].…”

Section: Typical Post-derailment Contact-impact Models 2421 Contact-i...mentioning

confidence: 99%

Train post-derailment behaviours and containment methods: a review

Zhao

Wang

et al. 2023

Rail. Eng. Science

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Railway accidents, particularly serious derailments, can lead to catastrophic consequences. Therefore, it is essential to prevent derailment escalation to reduce the likelihood of severe derailments. Train post-derailment behaviours and containment methods play a critical role in preventing derailment escalation and providing passive safety protection and accident prevention in the event of a derailment. However, despite the increasing attention on this field from academia and industry in recent years, there is a lack of systematic exploration and summarization of emerging applications and containment methods in train post-derailment research. For this reason, this paper presents a comprehensive review of existing studies on train post-derailment behaviours, encompassing various topics such as post-derailment contact–impact models, dynamic modelling and simulation techniques, and the primary factors influencing post-derailment behaviours. Significantly, this review introduces and elucidates substitute guidance mechanisms (SGMs), which serve as railway-specific passive safety protection and accident prevention measures. The various types of SGMs are depicted, and their ongoing developments and applications are explored in depth. The review additionally points out several unresolved challenges including the adverse effects of SGMs, and proposes future research directions to advance the theoretical understanding and practical application of train post-derailment behaviours and containment methods. This review seeks to be a valuable reference for railway industry professionals in preventing catastrophic derailment consequences through post-derailment containment methods.

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Section: Typical Post-derailment Contact-impact Models 2421 Contact-i...mentioning

confidence: 99%

Train post-derailment behaviours and containment methods: a review

Zhao

Wang

et al. 2023

Rail. Eng. Science

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“…The minimum size of the rail meshes is 1.5 mm near the wheel-track contact point, which included the areas of rail head surface and side of rail head. 27 As previously mentioned, two marshaling trains consist of the head and middle cars were considered in this study. The railway vehicle-container coupled FE model is shown in Figure 4.…”

Section: Contact Model and Boundary Conditionsmentioning

confidence: 99%

Running safety evaluation of a 350 km/h high-speed freight train negotiating a curve based on the arbitrary Lagrangian-Eulerian method

Deng

Peng

Yan³

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part F:

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To adapt to the rapid growth of the logistics market and further improve the competitiveness of railway transportation, the high-speed freight train with a design speed of 350 km/h is being developed in China. The safety of the train under great axle load of 17 t and dynamic load is unknown. This paper is aimed to study the running safety of the high-speed freight train coupled with various cargo loading conditions negotiating a sharp curve at high velocity. A numerical model integrated a fluid-structure coupled container model and the nonlinear high-speed freight train was set up by the software of LS-DYNA. The fluid-structure interaction model between the container and fluid cargo was established using the Arbitrary Lagrangian-Eulerian (ALE) method. Two influencing parameters, including the cargo state in the container and the fill level, were selected. The study results showed that the wheelset unloading ratio and overturning coefficient could be significantly affected by the liquid sloshing, while the influence of sloshing on the risk of derailment was slight. In general, increasing the cargo filling rate would contribute to vehicle operation safety. In conclusion, this study would provide theoretical help for the running safety of the newly designed high-speed freight train.

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“…In the 3D dynamic model constructed in this paper, the interaction between the wheelset and the rail is simulated by a general "Mesh-to-Mesh Contact Detection Method". The current wheel-rail contact model is set up based on 60 kg/m rails and the LMA profiles [32,33]. The wheel/rail normal contact force is calculated based on a nonlinear Hertz contact model, and the tangential contact force of the wheel and rail is simulated by the Coulomb friction model.…”

Section: Modelling Wheel/rail Contact Aubsystemmentioning

confidence: 99%

Full-Scale Train-to-Train Impact Test and Multi-Body Dynamic Simulation Analysis

Zhao

et al. 2021

Machines

Self Cite

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When a train crashes with another train at a high speed, it will lead to significant financial losses and societal costs. Carrying out a train-to-train crash test is of great significance to reproducing the collision response and assessing the safety performance of trains. To ensure the testability and safety of the train collision test, it is necessary to analyze and predict the dynamic behavior of the train in the whole test process before the test. This paper presents a study of the dynamic response of the train in each test stage during the train-to-train crash test under different conditions. In this study, a 1D/3D co-simulation dynamics model of the train under various load conditions of driving, collision and braking has been established based on the MotionView dynamic simulation software. The accuracy of the numerical model is verified by comparing with a five-vehicle formations train-to-train crash test data. Sensitivities of several key influencing parameters, such as the train formation, impact velocity and the vehicle mass, are reported in detail as well. The results show that the increase in the impact velocity has an increasing effect on the movement displacement of the vehicle in each process. However, increasing the vehicle mass and train formation has almost no effect on the running displacement of the braking process of the traction train. By sorting the variables in descending order of sensitivity, it can be obtained that impact speed > train formation > vehicle mass. The polynomial response surface method (PRSM) is used to construct the fitting relationship between the parameters and the responses.

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A study on the frontal oblique collision-induced derailment mechanism in subway vehicles

Cited by 8 publications

References 29 publications

Train post-derailment behaviours and containment methods: a review

Train post-derailment behaviours and containment methods: a review

Running safety evaluation of a 350 km/h high-speed freight train negotiating a curve based on the arbitrary Lagrangian-Eulerian method

Full-Scale Train-to-Train Impact Test and Multi-Body Dynamic Simulation Analysis

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