Accession Number:

ADA088420

Title:

Development of a Program for Computer-Based Resistance Analysis (COBRA).

Descriptive Note:

Final rept.,

Corporate Author:

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS STRUCTURES LAB

Personal Author(s):

Report Date:

1980-07-01

Pagination or Media Count:

97.0

Abstract:

This report describes the development of a computer-based approach to evaluating the hardness of structures subjected to attack by nonnuclear weapons. The program has the following features It introduces a normal random change in projectile impact point with respect to aim point. This models the targeting uncertainty of weapon delivery systems It accounts for both blast- and fragment-induced damage for each shot It models the cumulative damage and the resultant increase in vulnerability produced by a series of shots an attack It considers the redundancy of structural elements and approximately models their structural behavior with respect to blast-induced failure It models the curved path J hook of projectiles in soil It provides for proximity, contact, and delay fusing It models the vulnerability of personnel protected by structures and provides for user-specified vulnerability graphs for components protected by structures The main objective of this program development effort is to provide the designer of protective structures and the military strategist with specifications which relate hardness to the number of shots per attack and the number of attacks. By this means, it is anticipated that more economical time or money or both designs can be developed for various combinations of shots per attack, numbers of attacks, and weapon intensity. In like manner, a more real-world-oriented assessment of enemy structures will result from assessing hardness in terms of the probability of surviving various numbers of shots from a particular weapon system. Author

Subject Categories:

  • Armor

Distribution Statement:

APPROVED FOR PUBLIC RELEASE