Simulation Method for Dropper Dynamic Load Considering Horizontal Vibration Behaviour

Zhang, J. W.; Wu, Jian; Chen, W. R.; Guan, Junfeng; Zou, Yanfei; Xu, Kai

doi:10.2507/ijsimm18(4)492

Cited by 5 publications

(4 citation statements)

References 15 publications

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“…The first-order change and second-order change of pixel gray value in the y-axis direction of the image are calculated by the formulas (17) and (18).…”

Section: Impact Displacement Excitationmentioning

confidence: 99%

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Study on contactless measurement method of dropper load

Liu

Liang

et al. 2022

Advances in Mechanical Engineering

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The fatigue fracture of dropper will threaten the safe operation of high-speed railway. The accurate measurement of dropper load plays an important role in dropper fatigue test and service life prediction. In this work, according to the structural characteristics of catenary suspension and based on string vibration theory, a contactless method for measuring dropper load is proposed. In this method, the edge recognition technology is used to obtain the vibration displacement time history data of the dropper clamp position on the messenger wire, the random vibration is transformed into the linear superposition of sinusoidal vibration through Fourier transform to solve the vibration differential equation. Through the relationship between the shape change of messenger wire and concentrated force, the change of dropper load is analyzed. The measurement accuracy is tested on the test platform built in the laboratory, and the results show the measurement accuracy can reach 0.50%.

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“…The first-order change and second-order change of pixel gray value in the y-axis direction of the image are calculated by the formulas (17) and (18).…”

Section: Impact Displacement Excitationmentioning

confidence: 99%

“…In addition, with the increase of contact wire tension, the stress amplitude and maximum stress of dropper decrease significantly. 16 Zhang et al 17 found that the lateral swing of the dropper in the process of vibration deformation has an important impact on the dropper stress through field measurement and simulation analysis.…”

Section: Introductionmentioning

confidence: 99%

Study on contactless measurement method of dropper load

Liu

Liang

et al. 2022

Advances in Mechanical Engineering

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“…The reserve capacity and expected profits of both parties with different payment schemes and information sharing strategies can be calculated, the influence of payment scheme and information sharing can be analyzed, and the range of t that can make HSR carrier and express service provider accept APS and encourage the express service provider to share information can be further determined. According to the actual operation data of the high-speed rail express [ 5 , 6 , 27 , 42 ], the relevant parameters were set as follows: , , , , , , , and , according to the feasible scope of t concluded in the present study, set .…”

Section: Impact Of Payment Scheme and Information Sharingmentioning

confidence: 99%

Express delivery logistics with high-speed railway: a perspective of payment scheme and forecast information sharing

Huawei

Zheng

et al. 2021

Complex Intell. Syst.

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This paper investigates the payment scheme and forecast information sharing issues in the express delivery logistics with the high-speed railway. The HSR carriers need to coordinate the transportation capacity between passenger and freight. It is widely recognized that the advance payment scheme (APS) using as deposit is a beneficial way for the HSR carriers to make decisions on the transportation capacity preserved for express delivery. However, the express service providers, who possess private forecast information of express delivery demand, may share inaccurate information with the HSR carriers to acquire sufficient preserved transportation capacity. This paper discusses what payment scheme is preferred by the HSR carrier, the express service provider through discussing the deposit decisions with or without forecast information sharing. We show that sharing demand forecast information can reduce the prereserved capacity and increase the profits of the HSR carrier. With the delayed payment scheme (DPS), the express service provider has no motivation to share the information; while with the APS, the HSR carrier can reasonably choose the deposit to encourage the express service provider to share the demand information. Our analysis also shows that the HSR carrier’s profits with the APS is restricted by the investment returns and the express service provider’s information sharing decisions. We also analyze the value range of the deposit, which is a proportion of the overall payment, that allows both the HSR carrier and the express service provider to prefer the APS, as well as to encourage the express service provider to share the demand information.

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“…Vibrations in overhead contact systems are the main cause of wear in contact elements [9] and degradation of infrastructures [10] hence avoiding those oscillations will lead to greater lifetimes and reduction in maintenance activities. This reduction in times and expenses is the main objective of the elements described in this paper, based on its installation in existing infrastructures without changing the existing elements.…”

Section: Introductionmentioning

confidence: 99%

Vibration Reduction on Overhead Contact Rails: a Simulation-Optimization Approach

Calvo-Hernadez¹,

Bobi²,

Fernández³

et al. 2021

Int. j. simul. model.

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The use of overhead contact rail systems in rail transport has been favoured by the need of having an electrification system that allows its installation where space is limited.The displacement of a train pantograph running through a railway line causes an oscillating movement on the contact line. The overhead contact rail systems or rigid catenary, due to its characteristics, describes a movement with greater inertial forces than the equivalent flexible overhead contact lines. The main consequence is that at higher speeds larger variations in the contact force between pantograph and catenary wires occur, leading to contact loses and producing electrical arcs.Results obtained in the study developed on the implementation of stiffness compensation systems are described on this paper. Simulations demonstrate that it is feasible to reduce the effects of the movement described by the overhead contact rail's beam. This opens a new investigation field focused on develop the most efficient configuration for alternative overhead contact rail solutions.

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Simulation Method for Dropper Dynamic Load Considering Horizontal Vibration Behaviour

Cited by 5 publications

References 15 publications

Study on contactless measurement method of dropper load

Study on contactless measurement method of dropper load

Express delivery logistics with high-speed railway: a perspective of payment scheme and forecast information sharing

Vibration Reduction on Overhead Contact Rails: a Simulation-Optimization Approach

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