Study of pantograph-catenary system dynamic in crosswind environments

Luo, Qun; Mei, Guiming; Chen, G. X.; Zhang, Weihua

doi:10.1080/00423114.2023.2199456

Cited by 4 publications

(1 citation statement)

References 42 publications

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“…Regarding the influence of wind load, the preceding research predominantly focuses on catenary buffeting. For example, in [23,24], distinct approaches are employed to generate spatial wind fields from empirical wind speed spectra, subsequently deriving aerodynamic loads that act upon contact lines and affect the catenary model. An analysis of catenary buffeting responses ensues, alongside the quantification of their influence on the pantograph-catenary contact force.…”

Section: Literature Reviewmentioning

confidence: 99%

Suppression of Railway Catenary Galloping Based on Structural Parameters’ Optimization

Liu,

Song,

Duan

et al. 2024

Sensors

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Railway catenary galloping, induced by aerodynamic instability, poses a significant threat by disrupting the electric current connection through sliding contact with the contact wire. This disruption leads to prolonged rail service interruptions and damage to the catenary’s suspension components. This paper delves into the exploration of optimizing the catenary system’s structure to alleviate galloping responses, addressing crucial parameters such as span length, stagger dropper distribution, and tension levels. Employing a finite element model, the study conducts simulations to analyze the dynamic response of catenary galloping, manipulating structural parameters within specified ranges. To ensure accurate and comprehensive exploration, the Sobol sequence is utilized to generate low-discrepancy, quasi-random, and super-uniform distribution sequences for the high-dimensional parameter inputs. Subsequent to the simulation phase, a genetic algorithm based on neural networks is employed to identify optimal parameter settings for suppressing catenary galloping, taking into account various constraints. The results gleaned from this investigation affirm that adjusting structural parameters can effectively diminish the galloping amplitude of the railway catenary. The most impactful strategy involves augmenting tension and reducing span length. Moreover, even when tension and span length are fixed, adjusting other parameters demonstrates efficacy in reducing galloping amplitudes. The adjustment of messenger-wire tension, dropper distribution, and stagger can achieve a 22.69% reduction in the maximum vertical galloping amplitude. Notably, maintaining a moderate stagger value and a short steady arm–dropper distance is recommended to achieve the minimum galloping amplitude. This research contributes valuable insights into the optimization of railway catenary systems, offering practical solutions to mitigate galloping-related challenges and enhance overall system reliability.

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Section: Literature Reviewmentioning

confidence: 99%

Suppression of Railway Catenary Galloping Based on Structural Parameters’ Optimization

Liu,

Song,

Duan

et al. 2024

Sensors

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A novel multidisciplinary hierarchical collaborative optimization of the high-speed pantograph considering the uncertainty of joint clearances

Zhang,

Tian,

Liu

et al. 2024

Engineering Optimization

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Research on aerodynamic characteristics of the pantograph on double-stack high container transportation lines

Li,

Luo,

Zhao

et al. 2024

HFF

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Purpose The purpose of this paper is to study the aerodynamic characteristics and uplift force tendencies of pantographs within the operational height span of 1,600–2,980 mm, aiming to offer valuable insights for research concerning the adaptability of pantograph-catenary systems on double-stack high container transportation lines. Design/methodology/approach Eight pantograph models were formulated based on lines with the contact wire of 6,680 mm in height. The aerodynamic calculations were carried out using the SST k-ω separated vortex model. A more improved aerodynamic uplift force method was also presented. The change rule of the aerodynamic uplift force under different working heights of the pantograph was analyzed according to the transfer coefficients of the aerodynamic forces and moments. Findings The results show that the absolute values of the aerodynamic forces and moments of the upper and lower frame increase with the working height, whereas those of the collector head do not change. The absolute values of the transfer coefficients of the lower frame and link arm were significantly larger than those of the upper frame. Therefore, the absolute value of the aerodynamic uplift force increased and then decreased with the working height. The maximum value occurred at a working height of 2,400 mm. Originality/value A new method for calculating the aerodynamic uplift force of pantographs is proposed. The specifical change rule of the aerodynamic uplift force of the pantograph on double-stack high container transportation lines was determined from the perspective of the transfer coefficients of the aerodynamic forces and moments.

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Study of pantograph-catenary system dynamic in crosswind environments

Cited by 4 publications

References 42 publications

Suppression of Railway Catenary Galloping Based on Structural Parameters’ Optimization

Suppression of Railway Catenary Galloping Based on Structural Parameters’ Optimization

A novel multidisciplinary hierarchical collaborative optimization of the high-speed pantograph considering the uncertainty of joint clearances

Research on aerodynamic characteristics of the pantograph on double-stack high container transportation lines

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