Influence of the motion conditions of wheelsets on dynamic derailment behaviour of a bogie in railway turnouts

Lai, Jun; Xu, Jingmang; Zheng, Zhaoguang; Wang, Ping; Wang, Shuguo

doi:10.1080/00423114.2021.1975040

Cited by 12 publications

(2 citation statements)

References 32 publications

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“…[4][5][6][7][8][9][10] The effect of vehicle retarders on the derailment mechanism of railway vehicles at railway stations is still not clear. 11 Hence, the running safety of freight wagons needs to be evaluated when considering the longitudinal impacts.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of dynamic derailment in a railway switch considering the longitudinal impacts caused by vehicle retarder

Lai

Chen

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part F:

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The operating conditions at the railway marshalling station are quite complicated, featuring low-speed turnouts, sharp curves, and vehicle retarders. Train derailments frequently occur in the switch panel. However, the passive safety and derailment behaviour considering the longitudinal impacts are still not clearly understood. With this aim in mind, a three-dimensional freight wagon-track (turnout) dynamic interaction model considering the impacts between wagons in longitudinal direction is established. The braking of the vehicle retarder on wheels is also simulated. The comparative analysis between the simulation results and field observation for the derailment is presented. The derailment limits along the switch are assessed based on 3D quasi-static analysis and numerical simulation. The results show that the longitudinal impact from the rear wagon can significantly increase the derailment risk when an empty wagon located in the middle passes through the vehicle retarder and switch. As the side wear depth of the switch rail increases to 5 mm, the vertical wheel rise at the front of the switch increases from 0 to 4.73 mm even though the other parameters keep an ideal level. Proper measures such as rail grinding and lubricating are suggested to be adopted for optimizing wheel-rail contact relationships and improving running safety.

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Section: Introductionmentioning

confidence: 99%

Evaluation of dynamic derailment in a railway switch considering the longitudinal impacts caused by vehicle retarder

Lai

Chen

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…Many researchers have developed various kinds of track models (Pålsson et al, 2021; Sun et al, 2022) to study the influence of turnout and the wear mechanism between the wheel/rail contact (Kisilowski and Kowalik, 2021; Milosevic et al, 2022). The corresponding condition monitoring methods related to the bogie (Lai et al, 2021) and other grinding schemes (Lin et al, 2021) are proposed. But few of them focus on the relationship between the turnout and vibration fatigue of the vehicle.…”

Section: Introductionmentioning

confidence: 99%

Influence of rail weld irregularity on dynamic stress of bogie frame based on vehicle-track rigid-flexible coupled model

Sun

Lai

Dai

et al. 2022

Journal of Vibration and Control

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To examine the effects of rail weld irregularity on the dynamic stress of the bogie frame, a numerical model which considers the bogie frame flexibility is established. Field measurements were conducted to validate the reliability of the proposed model and the bogie frame’s modal vibration including the bending deformation of cross beams at 50 Hz can be observed. A comparison between the flexible bogie frame model and the traditional multi-body dynamics model is conducted to investigate the influences of the bogie frame’s flexibility on wheel-rail interactions. Then the numerical model of the rail weld joint is proposed to study the P2 resonance performance and the dynamic stress patterns of the bogie frame. A comparison of influences with different rail weld irregularities and parameter studies are conducted. Then the effects of fastener stiffness on P2 resonance frequencies are discussed. The results show that it is necessary to consider the bogie frame’s flexibility in simulations which will aggravate the wheel-rail vibrations. The short wavelengths in combination with a certain speed could induce the bogie frame’s modal vibration and large track supporting stiffness will threaten the running safety of the vehicle which may also contribute to the formation of wheel out-of-roundness. Besides, the limit values of the rail weld irregularities are discussed to provide a reference for rail surface grinding from different aspects.

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Numerical and experimental investigation of longitudinal rail creep at turnouts on steep ramps under repeated loads considering realistic braking loads of vehicles

Wang

Xian

et al. 2023

Engineering Failure Analysis

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Influence of the motion conditions of wheelsets on dynamic derailment behaviour of a bogie in railway turnouts

Cited by 12 publications

References 32 publications

Evaluation of dynamic derailment in a railway switch considering the longitudinal impacts caused by vehicle retarder

Evaluation of dynamic derailment in a railway switch considering the longitudinal impacts caused by vehicle retarder

Influence of rail weld irregularity on dynamic stress of bogie frame based on vehicle-track rigid-flexible coupled model

Numerical and experimental investigation of longitudinal rail creep at turnouts on steep ramps under repeated loads considering realistic braking loads of vehicles

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