Simulation of vehicle-turnout coupled dynamics considering the flexibility of wheelsets and turnouts

Chen, Jiayin; Wang, Ping; Xu, Jingmang; Chen, Rong

doi:10.1080/00423114.2021.2014898

Cited by 21 publications

(3 citation statements)

References 30 publications

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“…18 Thus, the profiles at three different positions on the whole wheel are measured, with the final profile taken as the average value of these measurements. The accuracy of the With increased flange wear, the curvature of the profile decreases within the abscissa range of x2 [23,36] mm, which lies within the flange root area. The low initial curvature of the flange root may lead to changes in the lateral displacement of the wheelset.…”

Section: Worn-flange Wheel Profilementioning

confidence: 76%

“…21,22 To improve the calculation efficiency, The effective analysis frequency was set to 2.5 kHz for this simulation, which is sufficient to fully reflect the natural frequencies of the rails in turnouts excited by wheel-rail impacts. 23 The centroid of the rail sections is taken as the node of the beam elements, which in turn is used to connect with the joint, constraint, and force elements in the SIMPACK software. To reflect the higher order modes of the rails, nodes are selected for every half-span of the sleepers present in the switch and crossing panels.…”

Section: Turnout Modelmentioning

confidence: 99%

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Effects of flange wear on dynamic vehicle-turnout interaction

Hao

Chen

Sun

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part F:

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Long-term investigations have revealed incidences of severe flange wheel wear in the field. Slight changes in the profile shape will lead to changes in the geometric relationship between wheel and rail, hence affecting the dynamic wheel-rail interaction. The turnout is an essential piece of track equipment for carrying out train transfer or cross line operation. In turnouts, the rail profile changes throughout the structure, and the wheel load transfers from one rail component to the next, resulting in a complex wheel/rail relationship. This paper investigates the effect of flange wear on the wheel-rail interaction as the vehicle switches into the turnout track in a diverging movement. A coupling model for a high-speed flexible turnout and a multi-rigid vehicle is established, and the dynamic contact trajectories between wheel and rail, the vibration energy of the rail, the lateral wheel-rail force, rail wear, and car body driving stability are analyzed. The results show that the wheel transition position is shifted backward due to the flange wear, and a less sharp impact occurs with a worn flange profile during wheel load transition in the switch panel, which improves lateral wheel-turnout interaction and the rail wear. Worn flange profiles give a large flangeway clearance, which is not conducive to the smooth operation of vehicles in the diverging route of turnouts.

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Section: Worn-flange Wheel Profilementioning

confidence: 76%

Section: Turnout Modelmentioning

confidence: 99%

Effects of flange wear on dynamic vehicle-turnout interaction

Hao

Chen

Sun

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…To further study the impact of debonding between layers in the turnout area on the dynamic characteristics of the vehicle-track coupled system, a turnout model that considers the deformation characteristics and vibration response of the vehicle and track structure must first be established. In References, 13,14 a rigid-flexible vehicle-turnout coupled dynamic model considering the flexible deformation of rails and wheelsets was established, in order to analyse the dynamic wheel-rail interaction in the wheel load transition zone, revealing the modal resonance properties of the axle box and wheelset in the turnout area. On that basis, Xu J M 15 refined the vehicle-turnout coupled model, establishing different sizes of wheel flat models and analysing the impact of a variety of factors, including flat size and phase, on the dynamic characteristics of the vehicle crossing.…”

Section: Introductionmentioning

confidence: 99%

Impact of debonding between layers of ballastless turnouts on the vibration characteristics of the wheel-rail system

Li,

Yan

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part F:

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The mortar layer of the slab ballastless turnout is the weakest connecting part compared to the rest of the structure, meaning debonding between the turnout slab and the mortar layer is prone to occur under the dynamic load of a train. In order to study the impact of debonding on the vibration response of the wheel-rail system in the turnout area, a rigid-flexible vehicle-turnout coupled dynamic model that takes debonding into account was established based on the theory of vehicle-track coupled dynamics; the flexible deformation of the multi-rail and turnout slab was also included in the model. The impact of debonding on the wheel load transition and the vibration acceleration of the turnout structure and axle box were then analysed. The results show that: There are significant differences in the impact of different types of debonding on the vibration response of the vehicle-track coupled system. When the debonding height is less than the voiding limit, the impact of the debonding height is significant, while the vibration acceleration of the vehicle-turnout system remains basically unchanged once debonding height reaches the void limit.

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