Statistical Comparisons Between Qualification Tests for Gun-Fired ProjectilesSource: Journal of Applied Mechanics:;2010:;volume( 077 ):;issue: 005::page 51602Author:J. A. Cordes
,
J. Lee
,
T. L. Myers
,
G. Hader
,
L. Reinhardt
,
C. Kessler
,
N. Gray
,
M. A. Guevara
DOI: 10.1115/1.4001697Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The U.S. Army uses several types of tests to increase the reliability of gun-fired munitions. Systems, subsystems, and components are gun fired to assess reliability. When failures are found, root-cause investigations are completed and parts may be redesigned. For instance, the 155 mm projectile Excalibur uses several types of tests to find failures and build reliability. Components are tested in a rail gun, a new soft-catch gun, and in soft recovery vehicles. With the rail gun, test projectiles are fired from a worn gun tube into a trough of water. The soft-catch gun, a hybrid system using both air and water, has a standard cannon tube and a series of catch tubes to stop a projectile. The third type of test, a soft recovery vehicle, uses a modified tactical Excalibur with a parachute for a soft landing. All three types of tests have on-board recorders to capture ballistic accelerations. Accelerometer data are used in failure investigations, redesign parts, and to design new projectiles. The purpose of this paper is to compare accelerations from different types of ballistic tests. Comparisons were done to determine if the tests were in the same statistical family. Comparisons are made for a United States MACS 5 charge. The maximum axial forces were the same for the soft-catch gun and the soft recovery vehicle. In the balloting directions, the rail gun and soft recovery vehicle had similar forces. The set forward forces differed in all three cases, reflecting the different catch mechanisms for the projectiles. Comparisons of g-forces were also made using shock response spectra. The shock response indicated that the damage potential is greatest for the rail gun tests, consistent with an increase rate of failures for some electronics.
keyword(s): Spectra (Spectroscopy) , Shock (Mechanics) , Vehicles , Projectiles , Rails , Gun barrels , Data collection , Force , Reliability , Design , Electronics , Failure AND Water ,
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contributor author | J. A. Cordes | |
contributor author | J. Lee | |
contributor author | T. L. Myers | |
contributor author | G. Hader | |
contributor author | L. Reinhardt | |
contributor author | C. Kessler | |
contributor author | N. Gray | |
contributor author | M. A. Guevara | |
date accessioned | 2017-05-09T00:36:13Z | |
date available | 2017-05-09T00:36:13Z | |
date copyright | September, 2010 | |
date issued | 2010 | |
identifier issn | 0021-8936 | |
identifier other | JAMCAV-26794#051602_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/142378 | |
description abstract | The U.S. Army uses several types of tests to increase the reliability of gun-fired munitions. Systems, subsystems, and components are gun fired to assess reliability. When failures are found, root-cause investigations are completed and parts may be redesigned. For instance, the 155 mm projectile Excalibur uses several types of tests to find failures and build reliability. Components are tested in a rail gun, a new soft-catch gun, and in soft recovery vehicles. With the rail gun, test projectiles are fired from a worn gun tube into a trough of water. The soft-catch gun, a hybrid system using both air and water, has a standard cannon tube and a series of catch tubes to stop a projectile. The third type of test, a soft recovery vehicle, uses a modified tactical Excalibur with a parachute for a soft landing. All three types of tests have on-board recorders to capture ballistic accelerations. Accelerometer data are used in failure investigations, redesign parts, and to design new projectiles. The purpose of this paper is to compare accelerations from different types of ballistic tests. Comparisons were done to determine if the tests were in the same statistical family. Comparisons are made for a United States MACS 5 charge. The maximum axial forces were the same for the soft-catch gun and the soft recovery vehicle. In the balloting directions, the rail gun and soft recovery vehicle had similar forces. The set forward forces differed in all three cases, reflecting the different catch mechanisms for the projectiles. Comparisons of g-forces were also made using shock response spectra. The shock response indicated that the damage potential is greatest for the rail gun tests, consistent with an increase rate of failures for some electronics. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Statistical Comparisons Between Qualification Tests for Gun-Fired Projectiles | |
type | Journal Paper | |
journal volume | 77 | |
journal issue | 5 | |
journal title | Journal of Applied Mechanics | |
identifier doi | 10.1115/1.4001697 | |
journal fristpage | 51602 | |
identifier eissn | 1528-9036 | |
keywords | Spectra (Spectroscopy) | |
keywords | Shock (Mechanics) | |
keywords | Vehicles | |
keywords | Projectiles | |
keywords | Rails | |
keywords | Gun barrels | |
keywords | Data collection | |
keywords | Force | |
keywords | Reliability | |
keywords | Design | |
keywords | Electronics | |
keywords | Failure AND Water | |
tree | Journal of Applied Mechanics:;2010:;volume( 077 ):;issue: 005 | |
contenttype | Fulltext |