Assesment of the transverse galloping stability of a railway overhead located above a railway bridge

Avila-Sanchez, Sergio; López-García, Óscar; Cuerva, A.; Meseguer, José

doi:10.1016/j.ijmecsci.2017.07.024

Cited by 20 publications

(10 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The aerodynamic forces are applied to the pantograph models, and their effects on the contact force are evaluated by Carnevale et al [18] and Pombo et al [19]. The behaviour of the catenary under stochastic wind field is analysed by Song et al [20,21], and the aerodynamic instability of the catenary is investigated by Avila-Sanchez et al [22]. Based on historical data, the evolution of the contact wire wear is analysed and its effect on the pantograph-catenary contact force is studied by Wang et al [23].…”

Section: Literature Reviewmentioning

confidence: 99%

A methodology to study high-speed pantograph-catenary interaction with realistic contact wire irregularities

Song

Antunes

Pombo

et al. 2020

Mechanism and Machine Theory

View full text Add to dashboard Cite

In high-speed rail operations, the irregularity of the overhead system is a typical disturbance that affects the pantograph-catenary interaction performance. The existing methods, which treat the contact wire irregularities as hard spots, overestimate the negative effect of the irregularities on the contact force, leading to conservative results. In this work, a more accurate methodology aiming to include the effect of contact wire irregularities in the assessment of the pantographcatenary dynamic performance is proposed. Measured contact wire irregularity data, collected from the Chinese high-speed network, is added to the initial configuration of the catenary model, through a developed Target Configuration Under Dead-loads (TCUD) method. This approach is used here to investigate the effect of the contact wire irregularities on the contact forces. The results indicate that the catenary imperfections have a direct impact on the pantograph-catenary interaction, leading to an increment of the contact forces amplitude, an increase of their standard deviation and an expansion of the contact forces range. A frequency analysis of the results shows that the contact wire irregularity increases the Power Spectral Density (PSD) peaks of the contact force at specific frequencies relevant to the span length and to the dropper spacing.

show abstract

Section: Literature Reviewmentioning

confidence: 99%

A methodology to study high-speed pantograph-catenary interaction with realistic contact wire irregularities

Song

Antunes

Pombo

et al. 2020

Mechanism and Machine Theory

View full text Add to dashboard Cite

show abstract

“…16,17 The complex dynamic interactions of the contact wire and pantograph become more complicated under strong crosswinds and vulnerable to wind-related problems, such as contact loss between the pantograph and catenary and even the delay or cancellation of train travel. 16,18,19 There have been many railway transportation accidents involving catenary systems, 16,20 which has attracted the attention of many scholars. Park 21 investigated the static deflection, stiffness, and other parameters of the catenary using the finite element method and proposed an improved pantograph design.…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of the aerodynamic performance of trains and dynamic responses of catenaries for windbreak walls with different heights under crosswind

Dong

Liu

Xia

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part F:

View full text Add to dashboard Cite

Due to the deterioration of the crosswind-protection performance of the original earth embankment windbreak walls on the train with increased speed, researching the influence of the heightened windbreak walls on aerodynamic performances of trains as well as the protection of the catenary is necessary for optimizing the windproof performance. The improved delayed detached eddy simulation based on the shear stress transport (SST) κ-ω turbulence model was employed to simulate flow structures. Furthermore, the effect on the displacement of the catenary was investigated using the finite element method (FEM). The numerical case was validated against the field tests. The results show that the aerodynamic performances of the train were improved as the windbreak wall was heightened by 0.5 m. Whereas, further heightening the windbreak wall worsened the aerodynamic performance. When the windbreak wall was heightened by 0.5 and 1 m, the wind speed of the catenary was reduced by 31.17% and 53.87%, and the displacement of the catenary was reduced by 48.09% and 74.11%, respectively, compared with that of the original windbreak wall. These results reveal that the wind-protection performance on the train and catenary can be both improved by reasonably heightening windbreak walls.

show abstract

“…Increasing the wind incident angle or the height of the parapet would increase the turbulence intensity (Avila-Sanchez et al, 2010). Avila-Sanchez further analyzed the flow field of the doubletrack bridge parapet and the aerodynamic characteristics of the contact wire (Avila-Sanchez et al, 2017), comprehensively comparing their results with those of Scanlon and Oldroyd (2000) to determine that transverse galloping depends both on the aerodynamic coefficient of the contact wire and the incident flow characteristics. However, there are certain differences in the structures of bridge windbreaks and EEWWs, which will cause differences in the flow field behaviors in the catenary area.…”

Section: Introductionmentioning

confidence: 99%

Influence of height of earth embankment type windbreak wall on flow field characteristics and catenary wind-induced displacement

Yang

Liu

Shi

et al. 2021

Engineering Applications of Computational Fluid Mechanics

View full text Add to dashboard Cite

This paper aims at ensuring the safety of catenary operation, by considering the flow field characteristics of the specific railway terrain and the wind-induced dispalcement of the catanery contact wires. Combining fluid and structure analyses, the improved delayed detached eddy simulation (IDDES) method based on the κ-ω turbulence model was used to explore the flow field characteristics at the position of the contact wire area before and after the windbreak wall was increased. The finite element analysis method was used to study the wind-induced displacement, and the relationship between the raising height, the wind speed, and the displacement was comprehensively analyzed. The simulation results were verified by field tests. The results showed that after the rasising height was increased by 1 m, the horizontal wind speeds at the contact wire positions above two railway lines were reduced by 94.26% and 95.60%, respectively. With the decrease in the horizontal wind speed, the value of the wind-induced displacement in lateral direction was significantly reduced as well. Moreover, the response of the wind speed on the midpoint was more sensitive than that at the hanging point.

show abstract

Assesment of the transverse galloping stability of a railway overhead located above a railway bridge

Cited by 20 publications

References 68 publications

A methodology to study high-speed pantograph-catenary interaction with realistic contact wire irregularities

A methodology to study high-speed pantograph-catenary interaction with realistic contact wire irregularities

Comparative analysis of the aerodynamic performance of trains and dynamic responses of catenaries for windbreak walls with different heights under crosswind

Influence of height of earth embankment type windbreak wall on flow field characteristics and catenary wind-induced displacement

Contact Info

Product

Resources

About