Research On New General Trigger Fuze Technology Of 40mm Grenade Launcher

In order to provide a reference for optimization design of new universal warhead fuze of 40 mm caliber grenade launcher, the ball-shaped projectile rotation angular velocity attenuation was researched in exterior trajectory.The grenade outer ballistic was calculated by MATLAB and FULUENT.Drop performance of fuze with different wind cap structure was analysised.Fuze sensitivity and instantaneity under different wind cap structure and different target state were analysised. Ignition performance of the reverse primer detonator was anslysised.By comparison with other rotation angular velocity attenuation formula calculation results verified the correctness of each other.Exterior ballistic projectile can be solved with projectile shape coefficient and the zero lift drag coefficient simulated by FULUENT.The most unfavorable case of drop is in a vertical fall on a steel sheet through the simulation.The higher strength of the material of wind cap, deformation and residual plastic deformation is smaller under the premise of ensuring fuze sensitivity. Fuze sensitivity and instantaneity increased with decreasing angle.Fuze sensitivity and instantaneity is related to material and thickness of wind cap and materials, thickness and size of target, regardless of the fixed mode of target.The simulation and experiment show that the use of detonator set, not only detonate lead, but also reduce the weight of fuze.The output power of detonator improve with the increase of thickness of detonator set.Material of detonator set impact the output power heavily. Increase the bottom thickness of detonator set structure can not increase the output power when thickness exceeds 1 mm.Firing pin can decay the spread of detonation.Increaseing the length of firing pin can increase the output power of detonator. Firing body also has certain effect on attenuation of detonator detonation, the attenuation rate from low to high ranking material is 7A04 aluminum alloy,2A12 aluminum alloy and HPb59-1 lead brass.The increase of firing body top can weaken the detonation downward. When the thickness increased to 0.65 mm, lead can not be detonated by detonator.