Analysis of the effect of bore centerline on projectile exit conditions in small arms

Most finite element models of small arms focus on an idealized barrel, typically one with a perfectly straight bore centerline. Using five different experimentally measured bore centerlines, this investigation analyzes the effect centerline nonlinearity has on projectile exit conditions. This includes the effect of rotating a centerline through several orientations. Modeled using Abaqus/Explicit, this dynamic analysis simulates a single firing cycle for each centerline. Projectile jump is calculated for each model as a measure of the effects of warped centerlines. The warped centerlines have a small effect on barrel dynamics.     

FPGA在膛压无损检测仪中的应用

现场可编程门阵列FPGA是由用户定义功能的专用集成电路ASIC,具有高集成度、低开发成本、高性能等特点.结合膛压无损检测仪,论述了FPGA技术的应用.