Impact of Overhead Contact System for Heavy-Haul Railways in Service Condition on Pantograph-Catenary Interaction Performance.

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Bibliographic Details
Title:	Impact of Overhead Contact System for Heavy-Haul Railways in Service Condition on Pantograph-Catenary Interaction Performance.
Authors:	Tian, Xiaoyu¹, Chen, Junqing² 13699482882@163.com, Xiang, Yicheng², Guan, Jinfa², Fan, Yan¹
Source:	Journal of Engineering Science & Technology Review. 2026, Vol. 19 Issue 1, p242-252. 11p.
Subjects:	Finite element method, Railroad electrification, Dynamical systems, Railroad trains, Railroad maintenance & repair
Abstract:	With the growing demand for heavy-haul railway transportation, electromechanical load on pantograph-catenary systems has increased significantly, leading to the deterioration of service conditions, such as contact wire wear and irregularity, and seriously threatening current collection quality and operational safety. In order to reveal the mapping relationship and influence mechanism between the service state parameters of a heavy-haul railway catenary and its dynamic current collection performance, an analytical method for the dynamic performance of a pantograph-catenary system in heavy-haul railways that integrates field-measured data was proposed in this study. A high-precision coupled dynamic simulation model of the pantograph and the catenary for heavy-haul railways was established on the basis of finite element theory. By using 3D point cloud technology, the spatial position data of key nodes of the catenary were acquired under service conditions and imported into the model to calculate various dynamic performance indicators of the pantograph and the catenary during service. Furthermore, a comparative analysis was conducted to highlight the differences in dynamic performance between in-service and non-service conditions. Results show that, although the heavy-haul railway catenary does not meet the geometric requirements, i.e., the contact wire height deviation at the first dropper on both sides of the positioning point should be less than 10 mm and the height difference between any two adjacent droppers within a span should not exceed 20 mm, it fully satisfies the performance requirements of the dynamic contact force being greater than 0 N and less than 300 N, with the standard deviation of the contact force being less than 0.3 times that of the average contact force. Therefore, relevant regulations regarding geometric requirements can be appropriately relaxed. This study provides a theoretical basis for system safety assessment, lifespan prediction, and maintenance optimization. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	With the growing demand for heavy-haul railway transportation, electromechanical load on pantograph-catenary systems has increased significantly, leading to the deterioration of service conditions, such as contact wire wear and irregularity, and seriously threatening current collection quality and operational safety. In order to reveal the mapping relationship and influence mechanism between the service state parameters of a heavy-haul railway catenary and its dynamic current collection performance, an analytical method for the dynamic performance of a pantograph-catenary system in heavy-haul railways that integrates field-measured data was proposed in this study. A high-precision coupled dynamic simulation model of the pantograph and the catenary for heavy-haul railways was established on the basis of finite element theory. By using 3D point cloud technology, the spatial position data of key nodes of the catenary were acquired under service conditions and imported into the model to calculate various dynamic performance indicators of the pantograph and the catenary during service. Furthermore, a comparative analysis was conducted to highlight the differences in dynamic performance between in-service and non-service conditions. Results show that, although the heavy-haul railway catenary does not meet the geometric requirements, i.e., the contact wire height deviation at the first dropper on both sides of the positioning point should be less than 10 mm and the height difference between any two adjacent droppers within a span should not exceed 20 mm, it fully satisfies the performance requirements of the dynamic contact force being greater than 0 N and less than 300 N, with the standard deviation of the contact force being less than 0.3 times that of the average contact force. Therefore, relevant regulations regarding geometric requirements can be appropriately relaxed. This study provides a theoretical basis for system safety assessment, lifespan prediction, and maintenance optimization. [ABSTRACT FROM AUTHOR]
ISSN:	17912377
DOI:	10.25103/jestr.191.24