Accession Number:

ADP012475

Title:

Critical Velocity of Electromagnetic Gun in Response to Projectile Movement

Descriptive Note:

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

Report Date:

2001-04-26

Pagination or Media Count:

9.0

Abstract:

A model is developed to investigate the dynamic response of an electromagnetic EM rail gun, induced by a moving magnetic pressure during launch of projectiles. As the projectile velocity approaches a critical value, resonance can occur and cause high amplitude stress and strain in the rail at the instant and location of projectiles passage. In this study, governing equations of a railgun under dynamic loading conditions are derived that illustrate a lower-bound critical velocity in terms of material properties, geometry, and barrel cross-section. That represents the worst case or a lower bound solution for the structure under a dynamic loading condition. A study is then performed to show the effect of these parameters on the critical velocity of the barrel. Accordingly, the model that accounts for projectile velocity and gun construction can be used to guide and improve barrel design.

Subject Categories:

  • Ammunition and Explosives
  • Guns

Distribution Statement:

APPROVED FOR PUBLIC RELEASE