STUDY FOR THE BORE RESISTANCE FACTORS DUE TOFRICTION AND ENGRAVING IN NATO STANAG 4367,EDITION 3

摘要

In the last 10 years there has been an effort to further developSTANAG 4367 ed2 using more sophisticated modeling of the resistiveforce components versus the travel of the projectile in the gun tube.Through an investigation of different analytical methods, new physicaldefinitions and a formulation which includes total retarding forcetransmitted between the lands of the bore surface were established andthe rotating band and the radial compressing components of the forcewere developed. In addition, a new calibration method was introducedbased on using the same resistive, pressure distribution and burninglaw definitions in both the theoretical solution and in the gun p(t)analysis. Based on the results of this study, we found that the resistiveforce components defined in the gun p(t) model could be integratedinto the interior ballistic solution. The propellant burning definition isa key factor in modeling and calibration. This study supports the useof manometric bomb data in defining burning characteristics for use ininterior ballistic analysis.