Multiple-impact loading test device

Abstract

The application discloses a multiple-impact loading test device. The basic principle is to accelerate a plurality of projectiles by using an electromagnetic principle, a sensor is used to record the time and parameter change history curve of the projectiles impacting explosives, and a controller calculates the control parameters according to the measured data. An electromagnet at the bottom of a target plate sequentially sucks the projectiles that have completed the impacting task into the bottom to avoid mutual interference caused by the rebound of the projectiles and achieve multiple impactloading. The application has the advantages of high versatility, low cost and convenient replacement of easily-worn parts, can fill the blank of a test device and method for multiple impact ignition of explosives during a penetration process, and can provide technical guarantee for the development of penetration type anti-overload explosives.

Description

Technical field [0001] This application belongs to the technical field of explosive performance parameter experiments, and relates to a multiple impact loading test device, which is mainly used to study the impact safety of explosives and can provide technical support for the development of anti-overload explosives. Background technique [0002] Anti-overload explosives are a class of explosives with high mechanical properties designed for penetrating ammunition, such as 155mm caliber artillery charges, deep penetration missiles, etc. Studies have shown that the stress on the explosive charge during the penetration of the ammunition usually does not exceed 1GPa, this value is far from the impact initiation threshold of explosives (about 7GPa), so the ignition during the penetration of the explosive is usually attributed to the non-impact ignition mechanism, the non-impact ignition mechanism of the explosive during the penetration and the penetration process of the explosive The s...

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Problems solved by technology

[0003] (1) The large drop hammer cannot simulate the situation of multiple loadings, but only equivalently simulates the state of single loading, so the existing test methods cannot meet the research needs, and there is a technical gap;

[0004] (2) It is difficult to achieve multiple non-impact loading in the double-diaphragm test, and it is not suitable for the case where the research stress is lower than 1GPa

[0005] Anti-overload explosives are a type of explosives that are widely equipped in my country. Anti-overload safety is one of its core indicators. At present, my country does not have test devices and methods that can perform multiple non-shock loadings, and it is impossible to test the actual force during the penetration process of explosives. Accurate simulation of the situation has hindered the research process of anti-overload explosives, so there is an urgent need for a multiple impact loading test device to fill the gap in China

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