Contribution to the modeling, design, and experimental study of an augmentel railgun and its projectile
type: Dataset
description: This thesis was supervised by Professor Jean-Marie Kauffmann of the University of Franche-Comté. The co-director at the Royal Military Academy was Dr. Johan Gallant and the experiments at Franch-German Research Institute ISL were directed by Dr. Markus Schneider. A conventional electromagnetic railgun is composed of two conducting rails connected by a projectile. The magnetic field generated by the current in the rails interacts in the projectile resulting in an electromagnetic force accelerating the projectile. The projectile used in this thesis is two brush projectile. For a conventional railgun the most efficient way to increase the force on the projectile is to increase the current in the rails. But the current density is limited. The heating of the sliding contacts between the brushes and the rails due to the Joule losses and the friction can cause the contacts and can result in contact transition which we want to avoid. One way to reduce the heating is to add more current brushes to obtain a better current distribution between the brushes. Another way is to add an extra pair of rails and create an additional magnetic field. This augmenting field allows us to increase the electromagnetic force without increasing the current through the projectile. In this thesis the current and heat distribution in a two brush projectile in a parallel augmented railgun is studied through simulations and experiments. Because the current brushes and the inner rails form a closed loop, the augmenting field will induce a loop current and influence the current distribution between the brushes. The first simulation model is a global model of the railgun in PSice which allows us to predict the global currents as well as the average temperature in the brushes, the force on the projectile and the position and the velocity of the projectile. The model takes into account the velocity skin effect and was validated based on experiments. The second model is a finite element model in ANSYS fo…
landing page: https://theses.hal.science/tel-00800309
identifier: NNT: 2011BESA2010
keyword: augmented-railgun
keyword: current-distribution
keyword: distribution-de-courant
keyword: distribution-de-temperature
keyword: heat-distribution
keyword: infoeu-reposemanticsdoctoralthesis
keyword: lanceur-a-rails-augmente
keyword: modele-de-contact
keyword: modele-de-force-en-fonction-du-temps
keyword: projectile-a-deux-ponts-de-courant
keyword: spiotherengineering-sciences-physicsother
keyword: theses
keyword: two-brush-projectile
issued: 2026-05-12T20:13:09.149460
modified: 2026-05-12T20:13:09.149465
language: fr
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Contribution to the modeling, design, and experimental study of an augmentel railgun and its projectile
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00800309
issued: 2026-05-12T20:13:09.309988
modified: 2026-05-12T20:13:09.110622