Structural Design Issues for Electromagnetic Projectiles
Final rept. 1 May 89-1 May 90,
ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
Pagination or Media Count:
Many structural design issues in electromagnetic EM launch of projectiles can be analyzed by techniques used for conventional powder gun- launched projectiles. We give general design guidance and discuss analysis methods for assessment and management of EM launch loads. This information is distilled from design and analysis experience on saboted-rod kinetic energy KE projectiles to survive conventional launch environments. While the physics of EM launcher systems differ radically from conventional systems, many of the barrel projectile interactions problems are similar to those encountered in conventional systems over the past 15 years. Knowledge on solving conventional KE projectile problems may then benefit the EM community. In-bore loading characteristics of concern are 1 large axial forces 2 rapid initial rise times and jogs in loading due to EM current changes and 3 lateral loads. Transient finite element analyses of a 120-mm KE round subjected to EM and conventional loadings are presented. These help illustrate dramatic response differences between the two kinds of propulsion environments.
- Ammunition and Explosives