Research on Segmentation Evaluation Model of Sliding Electrical Contact Performance of Electromagnetic Railgun

Li, Shizhong; Li, Jun; Wang, Xinxin; Zhang, Qingxia; Liu, Peizhu

doi:10.1109/tps.2018.2888482

Cited by 6 publications

(2 citation statements)

References 4 publications

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“…When the contact pressure reached the critical strength of the rail, plastic deformation, such as a planning pit, occurred on the rail surface. Electrical current is concentrated in the planning area, leading to the generation of electric arcs, which cause planning ablation phenomena [35]. Twisting ablation is generated by the loss of contact between the A&R caused by the twisting of the rail during the launching process.…”

Section: Electrical Damagementioning

confidence: 99%

Research Progress on Surface Damage and Protection Strategies of Armature–Rail Friction Pair Materials for Electromagnetic Rail Launch

Wang,

Yao,

Zhou

et al. 2024

Materials

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Electromagnetic rail launch technology has attracted increasing attention owing to its advantages in terms of range, firepower, and speed. However, due to electricity-magnetism-heat-force coupling, the surface of the armature–rail friction pair becomes severely damaged, which restricts the development of this technology. A series of studies have been conducted to reduce the damage of the armature–rail friction pair, including an analysis of the damage mechanism and protection strategies. In this study, various types of surface damage were classified into mechanical, electrical, and coupling damages according to their causes. This damage is caused by factors such as mechanical friction, mechanical impact, and electric erosion, either individually or in combination. Then, a detailed investigation of protection strategies for reducing damage is introduced, including material improvement through the use of novel combined deformation and heat treatment processes to achieve high strength and high conductivity, as well as surface treatment technologies such as structural coatings for wear resistance and functional coatings for ablation and melting resistance. Finally, future development prospects of armature–rail friction pair materials are discussed. This study provides a theoretical basis and directions for the development of high-performance materials for the armature–rail friction pair.

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Section: Electrical Damagementioning

confidence: 99%

Research Progress on Surface Damage and Protection Strategies of Armature–Rail Friction Pair Materials for Electromagnetic Rail Launch

Wang,

Yao,

Zhou

et al. 2024

Materials

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“…Li et al found that friction heat accumulated in the thin layer of interface between armature and rail [18]. A lumped evaluation model and sliding electrical contact mechanism considering friction in ERL is established [19], [20]. In terms of section shape, major categories of rails in ERL include rectangle, convex, and concave [21].…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis in Electromagnetic Rail Launcher Taking Friction Heat into Account Under Active Cooling Condition

et al. 2020

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A high-efficiency thermal management system is one of the key points in the practical application of electromagnetic rail launcher (ERL). In this paper, the thermal characteristics in ERL with the section of rectangle, convex, and concave rails by active cooling under different friction coefficient condition are investigated. By two cooling approaches, at two launch rates, with four friction coefficients, peak temperature in convex rails at the same moment is minimum in three types rails. Joule heat dominates in three shapes rail by channel or surface/channel cooling approach, but friction heat is a nonnegligible part under multiple launching mode. The spatial and temporal distribution features of peak temperature of three shapes rail with different friction coefficient under active cooling condition are compared. The mathematical relations between friction coefficient, time and temperature rising caused by friction at pulse end time and shot end moment in ERL with the three types rail are obtained, respectively. In terms of obtaining lower maximal temperature in rail, the ERL with convex rails is the best one. INDEX TERMS Thermal analysis, electromagnetic rail launcher, friction heat, active cooling.

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Research Progress on the Optimization of the Inner Bore Cross-Section Shape of the Railgun

Xiao¹,

Li²,

Yuan³

et al. 2023

Lecture Notes in Electrical Engineering

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Research on Segmentation Evaluation Model of Sliding Electrical Contact Performance of Electromagnetic Railgun

Cited by 6 publications

References 4 publications

Research Progress on Surface Damage and Protection Strategies of Armature–Rail Friction Pair Materials for Electromagnetic Rail Launch

Research Progress on Surface Damage and Protection Strategies of Armature–Rail Friction Pair Materials for Electromagnetic Rail Launch

Thermal Analysis in Electromagnetic Rail Launcher Taking Friction Heat into Account Under Active Cooling Condition

Research Progress on the Optimization of the Inner Bore Cross-Section Shape of the Railgun

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