A rigid-flexible coupling finite element model of coupler for analyzing train instability behavior during collision

Article Engineering, Mechanical

Collision characteristics of the intermediate coupler of a rail vehicle

Jingke Zhang et al.

Summary: The goal of this study is to establish a refined finite element model to investigate the bending resistance and buckling instability characteristics of the intermediate coupler. The results verify the accuracy of the proposed model.

VEHICLE SYSTEM DYNAMICS (2023)

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Article Engineering, Manufacturing

A novel design method of the impact zone of a high-speed train

Hui Zhao et al.

Summary: This study introduced a novel design method of impact zone based on the concept of linear impact force, leading to an optimized design with smaller impact acceleration peak value, higher utilization efficiency of compression stroke, and more uniform distribution of crashing displacement.

INTERNATIONAL JOURNAL OF CRASHWORTHINESS (2022)

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Article Engineering, Civil

Parameter study and multi-objective optimization for crashworthiness of a B-type metro train

Yanwen Liu et al.

Summary: The crashworthiness performance of a train is directly affected by the vehicle weight, train collision speed, and empty stroke. Research shows that collision speed has the greatest influence on crashworthiness, followed by vehicle weight, with empty stroke having the least impact. The optimized metro train exhibits improved integrity in passenger living space and lower average train collision deceleration.

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART F-JOURNAL OF RAIL AND RAPID TRANSIT (2022)

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Article Engineering, Manufacturing

The derailment behaviour and mechanism of a subway train under frontal oblique collisions

Shuguang Yao et al.

Summary: Research shows that in frontal oblique collisions, the movements of middle couplers and lateral impact forces are the main factors causing train derailment. With increasing impact angles, the derailment behavior and mode of the train also change. Limiting the yawing movement of middle couplers and improving the lateral crashworthiness of vehicle structures are effective measures to reduce the risk of train derailment during oblique collisions.

INTERNATIONAL JOURNAL OF CRASHWORTHINESS (2021)

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Article Engineering, Mechanical

Numerical investigation on the dynamic behaviour of derailed railway vehicles protected by guard rail

Jun Lai et al.

Summary: The study demonstrates that the oblique angle has a strong influence on dynamic derailment behaviors. At a large gap, the bogie generates noticeable distortion, which is very detrimental to the derailed vehicles. It was found that when the gap is 200 mm, the derailed wheelsets roll on the sleepers stably. High derailing speeds can also cause significant impact forces.

VEHICLE SYSTEM DYNAMICS (2021)

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Article Transportation Science & Technology

Coupler force reduction method for multiple-unit trains using a new hierarchical control system

Jacek Jackiewicz

Summary: The paper aims to develop a new control system to supervise the longitudinal dynamics of each train carriage in a multiple-unit train to reduce the longitudinal coupler forces during traction and braking. The control system's hierarchical structure consists of two levels, with the second level using feedback compensation to reduce longitudinal coupler forces.

RAILWAY ENGINEERING SCIENCE (2021)

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Article Engineering, Electrical & Electronic

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

Hui Zhao et al.

Summary: The study investigates the dynamic response of trains during train-to-train crash tests and establishes a dynamic model to predict their behavior accurately. The sensitivity of key influencing parameters is discussed, with results indicating that impact velocity has a significant effect on the movement displacement of the vehicle.

MACHINES (2021)

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Article Engineering, Electrical & Electronic

Simulation of Energy Absorption Performance of the Couplers in Urban Railway Vehicles during a Heavy Collision

Sunghyun Lim et al.

Summary: The study introduced a simulation technique using a mathematical buffer model to evaluate the performance of railway vehicle buffer systems. Analyses were conducted on the buffering characteristics of a 10-car train colliding at 25 km/h using the developed simulator, showing a connection between rubber buffers and hydraulic shock absorbers.

MACHINES (2021)

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Article Engineering, Mechanical