Research On The Key Technology For The Safe Detonation Of A Rocket Fuze

The key technologies of detonating fuze safely,which takes a certain type of underwater acoustic interference device as the object,have been researched.The research contents include the launch intensity analysis of the boosters and the safe detonation distance between adjacent bullets in the case of shock wave and fragment.In order to study the emission intensity of the structure of boosters,the force analysis of the rocket fuze in the launch environment was carried out.The additional overloads,which caused by friction,air resistance and thrust misalignment,were calculated by theoretical methods.Compared with the launch environment of artillery projectiles,the rocket emission overload is no more than several hundreds g.Compared with the emission overload,the additional overloads is very small and usually ignore them except the overload caused by thrust misalignment.In order to stably and reliably detonate the main charge,several structures of high energy boosters were designed.The emission intensity of these structures were validated by theoretical calculation,and then the simulation was used to verify it.The results show that the intensity of the boosters can meet the requirement,and the maximum error between the theoretical value and the simulation value is 11%,which is within the acceptable range.Through the comparison of the results,it can be concluded that the strength of high energy booster structures were lower than that of cylindrical booster under the same dosage(except for hemispherical booster),and the taper will reduce the strength of booster structures.The conclusion can provide reference for the design of structures of booster.In order to study the safe distance of underwater ammunition,the underwater explosion process of bullets was simulated,and the pressure change rule of shock wave was obtained.In order to obtain the pressure on the bullets to be detonated by the shock wave,the model of bullets to be detonated at different distances of detonating bullets was established to simulate.The results show that the pressure of the shock wave on the surface of the bullet is obviously higher than the pressure in the water.In order to obtain the pressure of the fragment and shock wave simultaneously on the bullet,the distance that the fragment and shock wave arrived at the same time was calculated.The pressure produced by the fragment impacting the bullets to be detonated was simulated.The results show that the impact effect of fragment is far less than the shock wave when the fragment is ricocheted.The conditions of safe distance for underwater ammunition were presented.It include that the adjacent bullet is no detonation and not blind.According to the simulation results,the safe distance of underwater ammunition can be obtained.