Pill for air-cannon-impacting mechanics experiment and device for testing speed of pill

Abstract

The invention relates to sub-master pills for an air-cannon-impacting mechanics experiment and a device for testing the speed of the pills, and belongs to the technical field of sub-master pill separation. According to the pill for the air-cannon-impacting mechanics experiment and the device for testing the speed of the pill, in an impacting dynamic experiment that abnormal pills collide a selected some-point structure, as for the problem that an internal sub-pill deviates from a designed flight route and the speed measurement aim of the sub-pill, by accurately designing the structure of the sub-master pills and pill speed measurement equipment, the two problems are solved. In the experiment process, pill sectioning is carried out without relying on friction between the master pill and air, and the master pill is reliably sectioned through heat generated by friction between the master pill and a gun barrel and the rotary inertia of the master pill. According to the technical scheme, the length of a target chamber can be reduced, the air-cannon building price can be reduced by 1 / 5, and meanwhile the pointing accuracy of the impact collision point and the experimental repeatability are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of parent projectiles, and in particular relates to special seed projectiles used for mechanical experiments of impact gas guns and a device for testing the projectiles. Background technique [0002] In the mechanical experiments of impact gas guns, high-pressure gas is often used to drive projectiles. The following documents record this technology: [0003] Chapter 2, Section 3 of "Theory and Technology of Dynamic High Voltage" (edited by Fuqian and Chen Junxiang), published by National Defense Industry Press in 2006; [0004] Wang Ningyu, A first-class light gas cannon for material collision experiments, Explosion and Shock, 1993, 13(1): 90-96; [0005] Guo Yangkuan et al., Research on solving the normal and tangent plane of Archimedes helicoid based on matlab, Tool Technology, 2009, 11:77-794; [0006] Liu Huran, Hu Qingxi, Undercutting of Archimedes helicoid with disc cutter, Mechanical Technologist, 1...

AI Technical Summary

Problems solved by technology

[0023] Under the action of friction between the double-petal mother projectile and the air in the closed target chamber, the mother projectile petals in the separation process interact with the air to generate eddy currents; due to the friction with the air, the projectile opens. The flight attitude of the projectile with its petals open, such as image 3 As shown, in this process, the split projectile is very easy to deviate the built-in projectile belt from the designed flight path, resulting in the failure of the experiment;

[0024] In the experiment, if it is necessary to use irregular metal (such as a square or short columnar sample) as a projectile, it is more difficult to determine the trajectory produced by the friction between the irregular surface and the air after separation from the parent projectile, so that the flight trajectory after separation is easier. There is a serious deviation from the designed flight route, which leads to the failure of the experiment; in addition, the technology of using a high-speed camera to measure the flight speed of the submunition assembly is the same as that of the first solution.

[0025] Therefore, it is necessary to propose a newly designed sub-parent projectile and its separation technology. At the same time, it is necessary to design a set of device for measuring the sub-projectile, so that it can overcome the discrepancy when the parent projectile and the sub-projectile embedded in it are separated from each other in the prior art. Stable, unstable bullet flight, indirect and inaccurate measurement of bullet velocity

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