Track damage comparison between conventional and articulated trains operating on a Great Britain railways ‘classic’ mainline route and a high-speed route

Rhodes, Andy; Hunt, Geoff; Harwood, N; Baron, Laurent; Borrell, Jaime

doi:10.1177/0954409718805256

Cited by 2 publications

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References 1 publication

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“…The application of the criteria required by the normative related to running safety, ride quality and track fatigue, assessed on a case-by-case basis, allow to evaluate if the loads are more impacting the vehicle's or the track's damage. The interested reader can find more details in references [1,71,95,96]. In the following some examples of impact analysis are provided.…”

Section: Identification Of Relevant Case Studiesmentioning

confidence: 99%

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Impact of rail infrastructure maintenance conditions on the vehicle-track interaction loads

Ariaudo¹,

Verardi²,

Pombo

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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The rail infrastructure and the track components are expensive assets with long life spans and high maintenance costs. The cost efficiency, performance and punctuality of train operations heavily depend on the track conditions. Ideally, the railway track would be completely smooth providing continuous support to the rolling stock running on it. In practice, however, the infrastructure cannot be installed without irregularities. These defects will increase over time due to the service loads imposed by the railway vehicles. The aim of this work is to use advanced computational tools to predict how the vehicles will respond to changing levels of track defects. For this purpose, the track and its maintenance conditions are characterized in realistic operation scenarios and modelled with detail in order to enable studying the interaction loads that are imposed to the vehicles by the track conditions. The presented methodology enables to identify the track health indexes that have higher influence on the dynamic loads transmitted to the rolling stock. It was observed that the track layout, track irregularities and degradation of the rails have the larger influence on the vehicle-track interaction loads with consequences in terms of safety and maintenance costs. In this way, this work contributes to the development of solutions with technological relevance, giving answer to the industry’s most recent needs in terms of reducing the maintenance costs and decreasing the incidents that cause traffic disruptions, contributing to improve the competitiveness of the railway transport.

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Section: Identification Of Relevant Case Studiesmentioning

confidence: 99%

“…The interested reader can find more details in references. 1,71,95,96 In the following some examples of impact analysis are provided.…”

Section: Identification Of Relevant Case Studiesmentioning

confidence: 99%

Impact of rail infrastructure maintenance conditions on the vehicle-track interaction loads

Ariaudo¹,

Verardi²,

Pombo

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

Self Cite

View full text Add to dashboard Cite

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Research on resonance mechanism of articulated train car body based on modal vibration extraction method

Liu,

Gong,

Zhou

2024

Journal of Vibration and Control

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The physical vibration of railway train car body is the superposition of various modal vibrations of the car body. In this study, a modal vibration extraction method (MVEM) based on singular value decomposition and least squares fitting is proposed to decouple the physical vibration of the car body into modal vibrations. Then, from the perspective of modal vibration energy, the calculation method of modal vibration contribution (MVC) is proposed, and the main participating modes of the car body are tracked in the process of train operation, and the resonance mechanism of articulated train car body is analyzed based on them. The results show that the end constraint forms of the head car body and the middle car body of the articulated train are different, resulting in the influence of the velocity on the yaw vibration energy of the head car body is obviously greater than that of the middle car body; due to the articulated effect between the train car bodies, the yaw motion of each car body is aggravated, which further worsens the lateral ride quality of the car body floor above the bogie; with the increase of train running speed, the dominant modes contributing to car body vibration change from rigid modes to elastic modes. The first-order vertical bending mode, first-order lateral bending mode, and diamond-shaped deformation mode contribute greatly to car body vibration, and there is no resonance between them and bogie frame. In fact, geometric filtering is the reason for the resonance of the car body. Moreover, the geometric filtering phenomenon occurs in the vehicle with symmetric structure (middle vehicle) and the vehicle with incomplete symmetric structure (head vehicle), and the geometric filtering phenomenon also exists in the vertical and lateral vibration of the vehicle.

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Track damage comparison between conventional and articulated trains operating on a Great Britain railways ‘classic’ mainline route and a high-speed route

Cited by 2 publications

References 1 publication

Impact of rail infrastructure maintenance conditions on the vehicle-track interaction loads

Impact of rail infrastructure maintenance conditions on the vehicle-track interaction loads

Research on resonance mechanism of articulated train car body based on modal vibration extraction method

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