Modeling Gun Dynamics with Three-Dimensional Beam Elements
Final technical rept.
ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
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The dynamic behavior of gun systems can be examined using finite element techniques to obtain approximate solutions to the equations of continuum mechanics. However, this approach may require many hours of both human and computer time to formulate the model analyze the results. Models which use beam theory to describe a gun system are viable alternatives. Beam models capture the basic behavior of the gun system but require substantially less computer time to utilize. Other benefits are the ease with which geometric models can be generated and the simplicity with which existing models can be modified to incorporate new modeling thrusts. Described here are some basic issues in the development of a three-dimensional beam model. Application of a code implementing the method which illustrates how a tank gun system can be successfully modeled with a three-dimensional beam model is then presented. The results are compared with predictions from DYNACODE-GP, Little Rascal, and with experimental data. Keywords Beam models Gun dynamics Finite element modeling, Gun barrel flexure Projectilegun tube interaction Continuum mechanics.