Study On The Impact Environment And Dynamic Characteristics Of Medium - Caliber Wire - Loaded Grenade Triggering Fuze

In order to provides references for research and design work of point detonating fuze of medium and large caliber rifled cannon projectile, using theoretical analysis, simulation and testing methods to do the research that overload of projectile dropping, the effect of loading time to deformation of the plate-shaped parts, centrifugal arming parts moving in bore and the bucking character of support.Get the peak and width of nose fuze and base fuze’s drop shock pulse that the projectile drops to different materials target from 1.5 m height with different attitude. The drop shock pulse peak of same attitude and same kind fuze decrease by steel, cast iron plates, concrete, wood and soil, while the width increase in this order. Dropping to the same materials target, the working time of pulse of the part which strike with target indirectly is later and the width is wider compared with the pulse of the part which strike with target directly. The acting time can be estimated by the stress wave propagation. The pulse peak of nose fuze is higher than base fuze’s when the attitude is head up and down. The pulse’s width of head horizon is wider than the other two attitudes.Do the simulation that deformation of plywood made by five different fuzes commonly used material under hammering and three different launch environments. The deformation of plywood under hammering environment is less than that under three different launch environments. The deformations of three different launch environments almost the same. The bigger the load is, the lager increase is which the deformation under hammering environment relative to under launch environment of normal bore. The influence of load time to the deformation of board made by 2A11,7075, HPb59-1 is bigger than that board made by 12Cr18Ni19 and 08 steel.With the force analysis of centrifugal claw in the bore, get its differential equations of motion. Dispersing the time which the projectile is in the bore, get the centrifugal claw’s start up time and arming time by iteration the equations with MATLAB. Simulate the motion of centrifugal claw by ADAMS, also get the start up time and arming time which are both close to the result got by theoretical analysis. The result can be used to calculate of arming delay.Do the simulation to bucking character of cylindrical support by ANSYS/Explicit. Get the dynamic characteristic of cylindrical support under the trusted environment of projectile lifetime. The support cannot buckle under the vibration environment, less than 47000 g fall overload, less than 38000 g setback overload and impact the soil with the velocity less than 80 m/s. While the velocity is more than 100 m/s, the support buckles. The buckling critical time increases obviously with the velocity increasing, while the critical stress increases inconspicuously. The falling angle is smaller, the critical stress is less and critical time is longer. The influence of projectile spinning to support’s bucking characteristics can be ignored, while the fillet and loam cake cannot.