Basic simple modeling of balloting motion of railgun projectiles. Technical report

Technical Report · Mon Jul 01 00:00:00 EDT 1991

OSTI ID:5196273

Chu, S H

This is the second of three basic reports dealing with the in-bore balloting motion of a projectile launched in an electromagnetic railgun. The first report addressed axial projectile motion without cocking and was titled A Basic Single Model of In-bore Motion of Railgun Projectiles. Understanding the inbore motion of a projectile is important to its design and its ability to hit a target with some effectiveness. Analysis of in-bore motion is a complicated problem since many parameters are involved and the interacting relationships between them must be determined. To make the problem easier to understand, it was analyzed on several levels beginning with the basic simple model which computed only the axial motion and followed by more complicated models in the upper analysis levels that included as many lateral forces and gun tube vibration effects as possible. This report deals with the second basic or zero level of balloting analysis. A basic simple model considering only the effect of the propulsion force, the friction force of the armature, and the clearance between the projectile and the barrel is presented. The computation of the axial projectile motion with a certain cocking angle is the goal of this analysis. Equations of motion are derived and solved. A sample computation with available data is performed and the results plotted to give a clearer understanding of balloting action.

• Research Organization: Army Armament Research, Development and Engineering Center, Dover, NJ (United States). Fire Support Armament Center
• OSTI ID: 5196273
• Report Number(s): AD-A-237938/6/XAB; ARFSD-TR-90029
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
PROJECTILES
EQUATIONS OF MOTION
MATHEMATICAL MODELS
DESIGN
ELECTROMAGNETISM
FRICTION
GUNS
INTERACTIONS
LAUNCHING
MOTION
PROPULSION
RAILGUN ACCELERATORS
TARGETS
WEAPONS
ACCELERATORS
DIFFERENTIAL EQUATIONS
EQUATIONS
MAGNETISM
PARTIAL DIFFERENTIAL EQUATIONS
450000* - Military Technology
Weaponry
& National Defense
640430 - Fluid Physics- Magnetohydrodynamics