3D numerical simulation and analysis of railgun gouging mechanism

Wu, Jinguo; Tang, Beibei; Lin, Qinghua; Li, Haiyuan; Li, Baoming

doi:10.1016/j.dt.2015.12.006

Cited by 12 publications

(4 citation statements)

References 13 publications

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“…With rapid wear and tear at the A&R interface contact, the armature gradually tilted towards one side of the rail, leading to an inclined impact on the guide rail, which may result in a gouge. Furthermore, Wu et al [19] established a 3D numerical model to simulate and analyze the mechanism and evolution of the gouging phenomenon on a rail. Their findings indicated that surface protrusions on the rail played a significant role in causing gouges.…”

Section: Mechanical 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: Mechanical 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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“…In the early research of electromagnetic railguns, it was ideally assumed that the geometry and material characteristics of the armature and the rails remained unchanged during the launch. However, many experiments have verified that there is in fact a significant gouging effect at the contact interface between the rails and the armature during the launch, that is, the material at the contact interface melts at high temperatures [48], [49]. A teardrop-shaped gouge crater and its microscopic view in the railgun experiment are shown in Fig.…”

Section: A the Coupled Mechanical-temperature Fields: The Gouging Effectmentioning

confidence: 99%

“…A model of the gouging effect during the launch is established in [48]. Fracture occurs when the accumulated effective plastic strain reaches the strain at fracture, which is…”

Section: A the Coupled Mechanical-temperature Fields: The Gouging Effectmentioning

confidence: 99%

Ammunition Reliability Against the Harsh Environments During the Launch of an Electromagnetic Gun: A Review

2019

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Electromagnetic railguns have an advantage over traditional chemical propulsion weapons, in that the projectile can be accelerated to extremely high speeds and effective damage can be achieved. However, during the launch from an electromagnetic railgun, the ammunition will be subject to a harsh environment, including very strong and violently changing electromagnetic fields, high-g acceleration impact, high temperatures, and so on; and thus, the reliability of the fuze is threatened, and the safety and damage effectiveness of the ammunition will be seriously degraded. In this paper, the harsh environment during the launch process is first reviewed, including the experimental data, the modeling, and simulation of the multiphysics fields. In particular, the coupling effect of these multiphysics fields are revealed, which aggravates the extreme environment. Furthermore, this paper reviews the protection of fuzes against strong magnetic fields and high-g impacts from three aspects, namely, materials, devices, and systems, and presents prospects for future research. This review will guide studies on the protection of fuzes and the stability of ammunition, as well as promote the effectiveness of electromagnetic railguns.INDEX TERMS Electromagnetic launching, fuze, reliability, harsh environment of multiphysics fields, electromagnetic shielding, anti-high-g impact technology.

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“…In view of the advantages of high initial velocity, high accuracy, long range, high power, easily obtained energy, and good concealment [1][2][3], the electromagnetic railgun has become an important member of the new concept weapon family. In the railgun, the pulse current is used as excitation, and the armature is accelerated to hypervelocity by the powerful Lorentz force, breaking the limitation of the exit velocity of the conventional artillery [1,4,5].…”

Section: Introductionmentioning

confidence: 99%

Effects of pulse current waveform on electromagnetic railgun considering the eddy current effects

2023

J. Phys.: Conf. Ser.

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This paper investigates the effects of pulse current waveform on electromagnetic railgun considering the containment eddy current effects. First, a three-dimensional transient finite element model of the railgun with a metal containment and a pulse current waveform control model with constant feed energy are established. Then, taking the eddy current effect into account, the effects of different waveforms with constant feed energy on the eddy current, the rail current, the armature propulsive force, the rail repulsive force, the eddy current energy consumption, and the muzzle kinetic energy are analyzed. Finally, the simulation shows that reducing the slope of the rising edge of the pulse current can effectively suppress the eddy current and improve the muzzle kinetic energy. When the amplitude and the slope of the rising edge are determined, the excessively long flat top section will lead to more serious eddy current concentration at the ending moment of discharge, more eddy current loss, and less muzzle kinetic energy. Too high or too low amplitude of the pulse current is not conducive to the improvement of the muzzle kinetic energy. The investigation of this paper provides some references for the design of electromagnetic railgun and the selection of pulse current waveform.

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3D numerical simulation and analysis of railgun gouging mechanism

Cited by 12 publications

References 13 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

Ammunition Reliability Against the Harsh Environments During the Launch of an Electromagnetic Gun: A Review

Effects of pulse current waveform on electromagnetic railgun considering the eddy current effects

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