Simulation analysis of launch stability of in bore charge at high speed

DOI:	10.11809/bqzbgcxb2023.09.016
Keywords:	base gap;in bore launch;high revolving; launch safety;charge stress;numerical simulation
Abstract:	There is a large axial acceleration and angular acceleration in the launching process of high speed rotating projectile, which leads to the relative motion between the charge and other parts, and affects the stability of the charge during launching. In this paper, LS DYNA software is used to simulate and analyze the influencing factors of the launching stability of in bore charge by changing the bottom gap, static/dynamic friction coefficient and chamber pressure. The results show that the peak stress of the bottom surface of the charge increases first and then tends to be stable with the increase of the bottom gap. The peak value of side stress increases with the increase of friction coefficient. When only the chamber pressure is changed, the micro element stress on the bottom and side of the charge increases with the increase of the chamber pressure. The rotational speed of projectile and charge also increases with the increase of chamber pressure, and the relative rotational speed between projectile and charge decreases with the increase of chamber pressure.
Published:	2023-09-28
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