Study on the Simulation Test Method for Mechanical Over-loading of Initiator

Abstract

In view of the needs of the mechanical over-load test evaluation of the second and third generation Initiators in the combat environment, the numerical simulation combined with the experimental verification method is used to study the influence of the material, outer diameter and length of the pulse shaper on the over-loading wave. The mechanical over-loading index parameters of the tooling in different states are obtained. The results show that as the length of the shaper increases gradually, the speed of the tooling target increases gradually and slowly, which prolongs the impact overload time. With the increase of the diameter, the acceleration time of the tooling target gradually shortens. When it increases to 44, the acceleration duration is not long. Steel with the diameter of 20mm and the length of 30mm is used as pulse shaper. When the bullet speed is 250m/s, the peak acceleration of the tooling target can reach 150,000 g, and the pulse width is 200 microseconds, which meets the requirements of the overload environment test for penetrating the steel target plate.