Dynamics of precision gun weapons. First conference

725 Pages·2016·21.9 MB·English

AD/I
R-TR-77-008
Q')
PROCEEDINGS, FIRST CONFERENCE ON:
DYNAMICS
OF
"a PRECISION GUN WEAPONS
X0
M
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HELD AT
ROCK ISLAND, ILLINOIS
D D C
JANUARY 26-27, 1977
rM ^Y 5 1
UMAY59?J
DISTRIBUTION STATEMENT A
Approved for public release.'
Distribution Unlimited
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Dynamics of Precision Gun Weapons t .,"F"i nl O
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18. SUPPLEMENTARY NOTES
Papers presented at conference on Dynamics of Precision Gun Weapons
19. KEY WORDS (Continue on reverse side ifn ecessary and Identify by block number)
Ballistics, Precision, Target acquisition, Stabilization,
Dynamics, barrel vibration.
0. ABSTRACT (Coatnue marv ersa .1 if neces.ary adl Identt fy by block number)
Twenty-two papers are presented by authors from five defense
laboratories, three industrial concerns and five universities.
Purpose of papers was to disseminate information on the dynamics
of precision gun weapons.
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hu. AVAIL m/o ESA
Proceedings, First Conference on:
DYNAMICS
O F
PRECISION GUN WEAPONS
Held At
Rock Island, Illinois
ED ED C
Januiary 26-27, 1977
MAY 5 1977
Sponsored and Organized by:
ROYCE BECKETT, Director, Rodmian Laboratory
MICHAEL HALTER, AWNCOM, Rock Island, Illinois
EDW4ARD HAUG, Professor, University of Iowa
VADIM KONKOY, Professor, Texas Tech University
SDISTRIBUTION' STATEMENT A
Approved for public relocwel
Distribution Unlimlted
Ed ited by E J . Hauig, Februiary 18,1977
FORWARD
The accuracy of a ballistic projectile is
dependent upon the precision with which a gun can be
pointed and upon the dynamics of the barrel and projectile
during launch. Advances in target acquisition- and in
stabilization and control technology yield great potential
for finding a target and then aiming a gun with high
accuracy. Less attention has been given to the dynamics
of the gun and projectile and how it effects accuracy.
Those factors of gun and projectile dynamics that contribute
to errors are:
(a) The effect of the droop and related dynamic
behavior of a bent gun tube projectile interaction.
(b) Balloting, or tube projectile interaction for
projectiles with rapid spin.
(c) Effects of barreL vibration and vibration of
the supporting structure or vehicle, which is trans-
mitted to the gun barrel.
(d) Response produced by weapon mechanism motion.
The purpose of the conference was to:
(a) Present the work of specialists who are addressing
problems of gun precision, and to
(b) Afford an opportunity for discussion and coordination
of methods and approaches to evaluating precision.
The conference was held in the Sheraton Hotel,
Rock Island, Illinois, January 26-27, 1977. Twenty-two papers
were presented, with authors distributed among:
(a) Five Defense Laboratories,
(b) Three industrial concerns,
(c) Five universities.
(i)
, -I. •
It is,further, interesting to note that four of the papers
were co-authored by individuals from various permutations
of these organizations. Finally, the distribution of
participants included:
(a) Fifteen U.S. defense laboratories,
(b) One U.K. defense laboratory,
-(c) Three military field organizations,
(d) Nine industrial concerns,
(e) Eight universities.
Based on the intensity of discussion and interaction among
the diverse groups of participants, we fee] that the goal
of dissemination of information was met.
AI
Ii
[In(ii)
CONFERENCE PARTICIPANTS
Dr. Martin Soifer S & I) Dynamics Inc., Long Is1aI.d
Alexande- S. Elder BRL, Aberdeen, Maryland
C.L. Honcy BRL, Aberdeen, Maryland
-B.T. Haag BRL, Aberdeen, Maryland
R.K. Loder BRL, Aberdeen, Mar.yland
Robert H. Whyte G.E., Burlington, Vermont
Roger H. Lapp APL, Johns Hopkins University
Dean S. Williamns Aeronutronic Ford, California
Leland A. Watermeier BRL, Aberdeen, Maryland
Prof. Ben Noble University of Wiscons i-
Prof. A.P. Boresi University of Illinois
H.L. Langhaar University of Illinois
R.E. Miller University of Illinois
T.T. Feng Ebasco, New York
B.L. Stearns G.E., Burlington, Vermont
William L. Andre Air Mobility Lab, Moffett Field, California
Clive N. Bowden RARDE, England
S.B. Kramer Hughes Helicopter, California
Harry J. Davis Harry Diamond Laboratory
John C. Houston ARES Inc., Ohio
James E. Wildman ARES Inc., Ohio
Edward J. laug University of Iowa
Dr. William Holm Georgia Tech.
Arthur Akers Iowa State University
Steven Newell Battelle, Columbus, Ohio
Thomas Lewis General Dynamics, Pomona
Dr. Norman Wykoff Jefferson Proving Ground
Dan Sabo AVSCOM, St. Louis
Victor Lindner Picatinny Arsenal
Charles Christensen Naval Ordnance, Maryland
George Reis Sandia Lab
William Pryor Picatinny Ar' inal
Howard Brunvoll Picatinny Arsenal
John Masly Picatinny Arsenal
Grant Manning Picatinny Arsenal
J. Domen Picatinny Arsenal
Dr. Charles Murphy BRL, Aberdeen, Vermont
CWO D. Luke MCDEC, Quantico
CW3 N. Goddard MCDEC, Quantico
SSGT. G. Gregory MCDEC, Quantico
Jim Ifeater Picatinny Arsenal
Kevin Fansler BRL, Aberdeen, Maryland
Edward Schmidt .BRL, Aberdeen, Maryland
Dr. Thomas Simpkins Waterviliet Arsenal
Robert Ryan Watervliet Arsenal
'}
(il)
Cenrg. iPflegl Watervliet Arsenal
P . Cox Southwest Research Inst., San Antonio
George Soo Hoo Dept. of the Navy
William Rodgers Navail Ordnance, Alexandria, Virginia
lHarry Reed BRL, Aberdeen, Maryland
Paul Boggs ARO, Durham, North Carolina
Joe Schmitz Frankford Arsenal
Robert trisiletti Frankford Arse-nal
JInthony Suchacki Chrysler Defense, Michigan
T. Tsui AWIhRC, Lexington, Massachusetts
Andrew Hauser University of Iowa
James Brown- Armor & Engr, Board, Fort Knox
Bill Frazier Armor & Engr. Board, Fort Knox
Vadin Komkov Texas Tech
Miclael Bawdren Frankford Arsenal:
-Willie Hall Quantico, Virginia
-Forbes Brown Lahigh University
CPT Michael Hal-ter ARMCOM, Rock Island, Illinois
John. Brinkman ARICOM, Rock Island, illinois
Gary Fischer ARNCOM, Rook Island, Illinois
-GQeorge Balunis ARMCOM, Rock Island, Illinois
Dr. Royce Beckett Rodman Laboratory, Rock Island
Harvey Garver Rodman Laboratory, Rock Island
Edward Larrison Rodman Laboratory, Rock Island
Dr. Ko Chang Pan Rodman Laboratory, Rock Island
Dr. Shih Chi Chu Rodman Laboratory, Rock Island
Robert Radkiewicz Rodman Laboratory, Rock Island
Verlin Baumgarth Rodman Laboratory, Rock Island
Robert Kasten Rodman Laboratory, Rock Island
Wayne Piehl Rodman Laboratory, Rock Island
Thomas lutchings Rodman Laboratory, Rock Island
(iv)
______
TABLE OF CONTENTS
Page
SESSION 1: MECHANICS OF WEAPONS
Chairman: Mr. Victor Linder
Picatinny Arsenal
"Historical Review and Survey of Current Problems
in Weapon Dynamics".
A.S. Elder, Ballistics Rsearch Laboratory,
Aberdeen, Maryland.
"Fundamentals of Weapon Dynamic Effects on Precision".
V. Komkov, Texas Tech University,
Lubbock, Texas. 27
"A Theoretical Model for In-Bore Projectile
Balloting/Barrel Motion".
G.S. Hoo, U.S. Naval Surface Weapons Center
Dahlgren, Virginia. 46
"Parametric Resonance in Gun Tubes".
T.E. Simkins, Watervliet Arsenal,
Watervliet, New York. 81
"Balloting-Energy Growth Possibilities".
K.S. Fansler, Ballistics Research Laboratory,
Aberdeen, Maryland. 147
"Transverse Dynamic Response of Gun Barrel with Time
Varying Supports".
T.T. Feng, Ebasco ServicesInc.,
New York, New York.
T. Hung, U.S. Army Armament Command,
Rock Island, Illinois. 179
"Aerodynamic Interference during Sabot Discard".
E.M. Schmidt, Ballistics Research Laboratory,
Aberdeen, Maryland. 199
SESSION 2: NUMERTCAL MET11ODS AND APPROXIMATION
TECHNIQUES
Chairman: Mr. John Brinkman
U.S. Army Armament Command
"A State Space Method for Optimization of Weapon
System Dynamics".
E.J. Hlaug and J.S. Afore, University of Iowa
Iowa City, Iowa. 217
"Sensitivity Analysis and Optimal Design of the
75mm Automatic Cannon Mechanism".
R.C. luang, E.J. Ilaug and J.G. Andrews,
University of Towa, Iowa City, Iowa. 258
(v)
Page
"A Finite Element Method of OjtimizLng Precision of a
Vibrating Weapon".
J.S. Arora and E.J. Haug,, University of -Iowa,
rowa City, Iowa.
T.T. Feng, Ebasco Service Inc.,
New York, New York. 305
"A Report of the Finite Element Method (FEM) Analysis of
the Medium Caliber, Anti-Armor Automatic Cannon".
G.A. Pflegl, Watervliet Arsenal,
Watervliet, New York. 340
"Radial and Transverse Response of Gun Tubes by Finite
Element Methods".
T.E. Simkins, Watervliet Arsenal,
Watervliet, New York. 373
"Investigation of Causes of Dispersion in Low-Dispersion
Automatic Cannon System (LODACS) Concept".
R.S. Newell, Battelle Memorial Institute,
Columbus, Ohio. 470
SESSION 3: INSTRUMENTATION AND EXPERIMENTAL TECHNIQUES
Chairman: Mr. flarvey Garver
Rock Island Arsenal
"Application of Accelerometers for the Measurement of
Gun Tube Motion".
J.O. Pilcher, C.L. Henry and R.B. Murray,
Ballistics Research Laboratory,
Aberdeen, Maryland. 497
"Deflecting Penetrator Simulation".
W.H. Hathaway, B.K. Stearns and R.11. Whyte,
General Electric Company,
Burlington, Vermont. 51.4
"The Experimental Verification of Buffer Discharge
Coefficients".
A. Akers, rowa State University,
Ames, Iowa. 528
"Precision Pointing and StabLlizatLon of a Low Dispersion
Automatic Cannon System".
R.E. Kasten, Rock Island Arsenal
Rock, Island, Illinois.
N. Lob, University of Iowa,
Iowa City, Iowa. 546
"On the Gun Pointing Accuracy of an Anti-Armor Automatic
Cannon".
A.P. Boresi, lI.L. Langhaar and R.E. Miller,
University of Ilinois,
Urbana, Illinois
S.C. Chu, Rock Island Arsenal,
Rock Island, Illinois. 577
(vi)