Research On The Technology Of The Artillery Armor And Its Fuze

In order to provide reference for the design of a terminal trajectory correction rocket and its fuze, the aerodynamic characteristics of rocket, which has damping wings closed and open two kinds of flight status, are simulated by using the FLUENT software. The relationship between drag coefficient and attack angle of spoiler rockets in large aspect ratio is researched deeply. The impact of the fuze mechanism (wine-vane-drive generator) of rocket’s warhead on jet is simulated and analyzed by using LS-DYNA software. The improvement ideas of shaft structure and materials are put forward to reduce the loss of jet’s penetration power. The dynamic characteristics of electric actuator is researched and analyzed by closed bomb principles in internal ballistics.The drag coefficient of the rocket’s two kinds of flight status at different attack angles and different Mach is obtained by simulation of the FLUENT software. The velocity field, the temperature field and the pressure distribution on the rocket’s surface are intuitive to access. The drag coefficient of damping wing open status about 4.5 times the closed status. The value of bomb-shaped coefficient’s weighted average coefficient is 3.296, which is used to calculate fixed ballistics. The function is deduced between the projectile’s drag coefficient and attack angles by simulated results that drag coefficient at different attack angles. This function is applied to the traditional structure of without damping wing rockets in large aspect ratio, while it is not suitable for the structure of damping wing open rocket in large aspect ratio.When 2A12 aluminum alloy, No.08 steel and high conductivity oxygen-free copper are used as the shaft’s material, the result of numerical simulation shows that 2A12 aluminium alloy reduces the loss of jet’s penetration power effectively. The wine-vane-drive generator’s shaft is modified into a hollow structure. The simulation result of the impact of improved wine-vane-drive generator’s structure before and after on jet shows that the jet’s penetration depth to armor steel target reduced 145.6 mm (25.8%) than the depth of no wine-vane-drive generator. After wine-vane-drive generator improved, jet’s penetration depth to armor steel target reduced 51.5 mm (9.1%). Its penetration depth increase 94.1 mm (22.5%) than the depth before improved wine-vane-drive generator. And the depth increased 94.7 mm (22.6%) when the shaft’s material is changed and the hollow structure is adopted simultaneously. All of these show that the head of jet has the largest contribution to the depth of penetrating armor steel target. The research result, the influence of shaft’s material and structure to jet’s penetration power, shows that the improvement of wine-vane-drive generator’s structure can enhance jet’s penetration power effectively.The greater the charge density in electric actuator, the faster the maximum pressure of gaseous products. The relationship between the two is line with three times of function without constant term. It is nonliner relationship between the force the plunger piston beared and the time or the displacement in the sealed cavity. The force declines sharply before slowly reduced to zero by the time or the displacement.