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Shock and Vibration
Volume 8, Issue 3-4, Pages 223-228

A Methodology for Characterizing Gun Barrel Flexure due to Vehicle Motion

Mark Bundy,1 James Newill,1 Vince Marcopoli,2 Michael Ng,2 and Charles Wells2

1Army Research Laboratory, Aberdeen Proving Ground, MD, USA
2General Dynamics Land Systems, Sterling Heights, MI, USA

Received 15 October 2001; Revised 15 October 2001

Copyright © 2001 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Barrel centerline curvature is known to influence the location of projectile shot impacts. Superimposed on the unique manufactured barrel centerline is the flexed barrel shape that can occur prior to firing while the vehicle is on the move. In order to understand and quantify the effects of barrel flexure on gun accuracy, it is necessary to determine what combination of fundamental mode shapes is most likely to occur. A method to accomplish this task is described in this paper. The method is demonstrated by enumerating the 10 most likely flexed barrel shapes that were found to occur in a tank-mounted gun barrel while it traversed a bump course.