Overview of Detection and Estimation of High-Speed Railway Catenary

Liu, Zhigang

doi:10.1007/978-981-10-2753-6_1

Cited by 8 publications

(5 citation statements)

References 24 publications

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“…The harmonic synthesis method is a method of simulating and modeling the random process by using spectral decomposition and trigonometric function superposition. The power spectral density of the wind velocity time history obtained by this method is basically consistent with the target value, and the fluctuation variance is also close to the theoretical value [21]. Therefore, this paper uses the harmonic synthesis method to simulate and analyze the wind field of the catenary additional wires.…”

Section: Wind Field Simulationsupporting

confidence: 70%

Effectiveness analysis of anti-galloping of spacer for catenary additional wires in strong wind section of high-speed railways

Zhang,

Zhao

et al. 2024

Archives of Electrical Engineering

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To effectively suppress the violent galloping of the catenary additional wires in the strong wind section of high-speed railways, the anti-galloping effectiveness and anti-galloping mechanism of the spacer installed on the catenary additional wires are studied. Firstly, the finite element model of the additional wires of the catenary before and after the installation of the spacer is established. Secondly, the random wind field at the additional wires is simulated by the harmonic synthesis method (WAWS). Finally, the galloping response of the additional wires before and after the installation of the spacer is studied by using the finite element software. The results show that the installation of a single spacer at the midpoint of the span can reduce the vertical amplitude of the AF (Additional Feeder) and the PW (Protection Wire) by more than 39.80% and 41.51%, respectively, and the lateral amplitude decreases by more than 16.55% and 38.30%, respectively. The tension of the AF is greatly reduced, while the tension of the PW is slightly increased, so that the galloping of the AF and the PW tends to be synchronized. With the increase in the number of spacers installed, the anti-galloping effect continues to increase. At the same time, the anti-galloping mechanism of the spacer rod to suppress the vibration of the additional wires through the traction effect is clarified, and the effectiveness of the spacer rod in the anti-galloping of the additional wires of the catenary is proved.

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Section: Wind Field Simulationsupporting

confidence: 70%

Effectiveness analysis of anti-galloping of spacer for catenary additional wires in strong wind section of high-speed railways

Zhang,

Zhao

et al. 2024

Archives of Electrical Engineering

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“…This is similar to the analysis of dropper failures from the perspectives of vibration realization, bending deformation, and bending characteristics in the literature. 21 It is found that the maximum tensile and compressive stress values of droppers II, III, and IV are higher than those of droppers I and V under the same wind speed. It is in agreement with the conclusion obtained by Wu et al 22 Specially, the compression amplitude and the repeated bending frequency of dropper III are the largest and it is prone to fatigue and fracture.…”

Section: Discussionmentioning

confidence: 84%

The influence of wind load on the stress characteristics of dropper for a high-speed railway

Chen

Guo

Pan

et al. 2022

Advances in Mechanical Engineering

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In this paper, the influence of wind load on the stress characteristics of dropper for a high-speed railway is studied. The section method is used to obtain the vibration equation of the dropper, and the finite difference method is used to convert the partial differential equation of the dropper vibration into a finite difference equation. Through the force analysis of the contact line section upwind, the vibration equation of the contact line with air damping is obtained. Thus, the partial differential equation of the motion can determine the initial and boundary conditions of each dropper. The MATLAB program is written to obtain the stress change diagram of each dropper, and the influence of wind load on the stress characteristics of the dropper is analyzed. The results show that the maximum tensile and compressive stresses of each dropper are different due to the difference of wind load and dropper location, and the dropper in the middle location is most sensitive to the change of wind load. At a low wind speed, there are immediate rebound and obvious attenuation vibration stages during the stress change of dropper. In addition, with the increasing speed of wind load, the stress amplitude and the maximum tensile stress of dropper do not almost change or decrease except the middle dropper.

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“…Gregori et al [11] studied the dynamic performance of high-speed railway overlapping catenary systems, considering double cantilevers and tensioning devices, with numerical simulations. Liu et al [12] examined the infuence of train speed on catenary fatigue and safety reliability based on dynamic stress test data and twodimensional fnite element simulation data of the Re250−0 simple chain suspension catenary. Zhang and Xie [13] investigated the infuence of diferent connection forms and contact line tension on the seismic response of the structure through a four-column three-span fnite element model of catenary.…”

Section: Introductionmentioning

confidence: 99%

Vulnerability Analysis of Catenary-Bridge-Track System

Yan,

Yu,

et al. 2023

Shock and Vibration

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Continuous welded rails on bridges are extensively employed in high-speed railways, where trains are predominantly electrically powered, and the open-air catenary represents the weakest link in the system. Despite the widespread use of continuous welded rail on bridges for high-speed railways, there exists a relative dearth of research on their vulnerability, particularly regarding seismic vulnerability studies that consider the catenary, track type, and bridge collectively. The vulnerability of fasteners and catenary on bridges under the longitudinal resistance of the line was investigated by constructing a 7−32 m high-speed railway double-line simply-supported box girder bridge. It reveals, for the first time, the influence of the longitudinal resistance of the line on the vulnerability of fasteners and catenary under seismic action. The study indicates that both the fasteners’ and catenary’s vulnerability increases with the intensity of ground shaking, with the catenary being more susceptible. The longitudinal resistance of the line has a greater impact on the fasteners’ vulnerability than the catenary. When the degree of damage is minimal, the order of damage to the fasteners is the ballasted track, small resistance fastener, and ballastless track when the probability of exceedance is 5%. The ballastless track can significantly increase the probability of no damage to the fasteners, and it is recommended that the ballastless track be used when designing high-speed railway bridges in earthquake-prone regions.

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Overview of Detection and Estimation of High-Speed Railway Catenary

Cited by 8 publications

References 24 publications

Effectiveness analysis of anti-galloping of spacer for catenary additional wires in strong wind section of high-speed railways

Effectiveness analysis of anti-galloping of spacer for catenary additional wires in strong wind section of high-speed railways

The influence of wind load on the stress characteristics of dropper for a high-speed railway

Vulnerability Analysis of Catenary-Bridge-Track System

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