Projectile In Barrel Research Articles

Velocity Measuring Tool of Projectile in the Barrel: Experimental Research Results of the Valid Layout

The work is devoted to the consideration of the methodology of experimental research of velocity measuring tool of the projectile in the barrel. The content of individual stages of conducting research is outlined. The research of the optical quality of the reflective coating is carried out. It is shown that the use of reflective paint and envelope in the coating of the front part of the projectile provides an effect of retroreflection, sufficient for the Doppler frequency shift. The influence of the retroreflective coating on the ballistic characteristics of the projectile has been investigated. It is defined that the relative increase of the mass and dimensions of the projectile, wich caused by the planted of the retroreflective coating on its front part, does not exceed, in accordance 0,10% and 0,025% of its output mass and length, therefore, the effect of these projectile parameters is too small and unable to exert a noticeable effect on its ballistic characteristics during of movement in barrel. The velocity projectile curves were carried by experimentally on an valid layout of the measuring tool , and their analysis was carried out. The possibility of using the double differential method of laser Doppler anemometry to measure the velocity of the projectile in barrel has been confirmed. Found that form the experimental curves velocity corresponds to the expected nature of the increase velocity of the projectile in the barrel of velocity measuring tool. The adequacy of the mathematical model of the measurement tool which obtained theoretically is confirmed.

Study on launch dynamics of the tank marching fire

As an army main battle equipment, it is required that the tank should have high firing accuracy and high first round hit probability during marching. The initial disturbance of the projectile is the premier factor that takes effect on the marching fire accuracy of the tank. And the marching fire accuracy of the tank depends on the launch dynamics behaviors of the tank. In this paper, the launch dynamics theory of a tank marching fire is studied, and its launch dynamics model is established. Based on the transfer matrix method for multibody system (MSTMM) and the automatic deduction theorem of overall transfer equations, the overall transfer equation and the overall transfer matrix of a tank multibody system are deduced; the launch dynamics equations of the tank marching fire are deduced, and the dynamic response of the tank system, the motion of projectile in barrel, the initial disturbance of the projectile and the vertical target dispersion are exactly simulated; meanwhile, the results of simulation are verified by tests. This work provides both theoretical foundation and simulation approaches for improving the marching fire accuracy of the tank.