Accession Number:

ADA278638

Title:

Improved Solids Modeling for Axisymmetric Projectile Design

Descriptive Note:

Technical rept. Nov 1987-Jan 1988

Corporate Author:

SYSTEM PLANNING CORP ARLINGTON VA

Personal Author(s):

• Buc, Steven M.

Report Date:

1988-01-01

Pagination or Media Count:

16.0

Abstract:

Accurate solids modeling plays an important role in the design and analysis of spin and fin stabilized projectiles. In particular, accurate knowledge of a projectiles mass, center of gravity, and its axial and transverse moments of inertia are important for stability and trajectory calculations. In practice, however, error sources exist with existing solids modeling techniques with respect to the determination of the mass properties of internal and external radii ogives, which until now could not be calculated with a closed-form solution. To address this issue, the generalized closed-form solution for the mass, axial, and transverse moments of inertia, and the center of gravity for radii is developed and the definite integrals presented. The resulting solutions are surprisingly simple to incorporate into a solids modeling package, and the input parameters are few and standardized for all forms of radii, both internal and external.

Descriptors:

• *PROJECTILES
• *FIN STABILIZED AMMUNITION
• INPUT
• CENTER OF GRAVITY
• INTEGRALS
• INTERNAL
• GRAVITY
• OGIVES
• TRANSVERSE
• MOMENT OF INERTIA
• DETERMINATION
• TRAJECTORIES
• EXTERNAL
• ERRORS
• SOLIDS
• PARAMETERS
• MASS

Subject Categories:

• Ammunition and Explosives

Distribution Statement:

APPROVED FOR PUBLIC RELEASE