Study On Ballistic Environment And Fuze’s Dynamic Characteristics Of Individual Fuel Air Explosive’s Rocket

In order to provide reference for the design and optimization of a individual rocket Fuel Air Explosive’s fuze, the four technologies that involving in the research of the projectile’s ballistic aerodynamic characteristics and the fuze’s dynamic characteristics were studied by theory and simulation method.In order to study the exterior ballistic characteristics of rocket, the curve of rocket engine thrust was fitted by 1stOpt software, and the rocket exterior ballistic differential equations which include rocket engine thrust curve function were solved by MATLAB software, and the influence of different engine ignition time on delay arming device and projectile’s range was obtained.The analysis results show that the rocket engine ignition time’s dispersion should be considered in delay arming device’s design. In low-firing-angle, the rocket ignition time had a great effect on the range of rocket and some effect on the vertical displacement at the far distance. In order to ensure the firing accuracy of projectile, a good ignition scheme should be chosen to strictly control engine ignition time’s dispersion.Theoretical calculation and simulation method of ADAMS software was applied to study the influence of different factors on runaway escapement under the inertial acceleration environment. The working time of runaway escapement under different circumstances was obtained. The results show that inertial acceleration has no effect on the runaway escapement’s working time when the torsion spring torque is large enough, the rotational inertia of balance and driving moment have a great effects on runaway escapement’s working time under inertial acceleration environment, they are suitable for adjusting the working time of runaway escapement; however,the variation of friction coefficient has little effects and unsuitable for adjustment.In order to study the set-forward overlord’s distribution of the lender-elasticity projectile when it impacts targets, the simplified method of thread was simulated by ANSYS/LS-DYNA software, and the projectiles with different fuze position impact different targets were simulated, the set-forward overlord factor of the projectile’s each part were obtained. The results show that the set-forward overlord’s value and response time of the lender-elasticity projectile’s different parts were obvious difference under the impact process, the farther from the warhead the later of overload response time. Affected by projectile and thread’s impact vibration, the set-forward overload of inside fuze was greater than projectile’s each part; the influence of impact vibration should be considered in the design of fuze strength,explosive element’s stability and insensitive performance.For the purpose of improving the producibility of fuze’s slender-booster, the output characteristics of different structures and different lengths boosters were simulated by finite element simulation software ANSYS/LS-DYNA, and the pressure-time curves of each warhead’s point after explosion were obtained. The detonate ability of different structures and different lengths boosters was judged by shock initiation theory, the results show that the-booster with cumulative grooves has stronger detonating ability, required less booster charge, and the axial dimension is the shortest.