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A multiple impact loading test device
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A loading test device and guide rail technology, which is applied in the field of explosive performance parameter experiments, can solve the problems of inability to accurately simulate the stress of explosives, the inability of large drop hammers to simulate multiple loadings, and the inability to meet research needs, etc., to fill the gap in China Effect
Active Publication Date: 2022-05-24
XIAN MODERN CHEM RES INST
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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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Embodiment 1
[0020] In the present embodiment, a multiple impact loading test device is designed, and two impact ignition tests are performed on B explosives, the interval between the impact of the two projectiles is 200ms, and the impact speed of the projectile is 100m / s.
[0021]A multiple impact loading test apparatus, wherein: the apparatus comprises a rail negative 1, armature A2, projectile A3, armature B4, projectile B5, rail positive electrode 6, laser tachymeter 7, electromagnet 8, net 9, strain gauge 10, specimen 11, base 12, temperature sensor A13, pressure sensor B14, particle speed sensor C15, data line 16 and controller 17, the rail negative electrode 1 and rail positive electrode 6 is a conductive metal, The length of the rail negative 1 and the rail positive electrode 6 is between the two 6 times ~ 10 times, so as to ensure that the projectile A3 and the projectile B5 obtain the best breeching speed, the projectile A3 and the projectile B5 are industrial pure iron material cy...
Embodiment 2
[0028] In the present embodiment, a multiple impact loading test device is designed, two impact ignition tests are carried out on passivated RDX explosives, the interval between two projectile impacts is 10ms, and the projectile impact speed is 180m / s.
[0029]A multiple impact loading test apparatus, characterized in that: the apparatus comprises a rail negative 1, armature A2, projectile A3, armature B4, projectile B5, rail positive electrode 6, laser tachymeter 7, electromagnet 8, net 9, strain gauge 10, specimen 11, base 12, pressure sensor A13, pressure sensor B14, pressure sensor C15, data line 16 and controller 17, the rail negative 1 and rail positive electrode 6 is a conductive metal, The length of the rail negative electrode 1 and the rail positive electrode 6 is between the two 6 times ~ 10 times, so as to ensure that the projectile A3 and the projectile B5 obtain the best breeching speed, the projectile A3 and the projectile B5 steel cylinder, the armature A2, the pr...
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Abstract
This application discloses a multiple impact loading test device. The basic principle is to use the electromagnetic principle to accelerate multiple projectiles at one time, and use sensors to record the time and parameter change history curves of the projectiles hitting explosives. The controller calculates the control parameters according to the measured data. The electromagnet at the bottom of the target plate sucks the projectiles that have completed the impact task into the bottom in turn, avoiding mutual interference caused by the rebound of the projectiles, and realizing multiple impact loading. The application has the advantages of high versatility, low cost, and convenient replacement of wearing parts. It can fill in the blank of no test device and method for multiple impact ignition of explosives in the penetration process, and can provide technical support for the development of penetration-resistant overload explosives.
Description
Technical field [0001] The present application belongs to the field of explosives performance parameters experimental technology, involving a multiple impact loading test device, mainly used to study the impact safety of explosives, can provide technical support for the development of anti-overload explosives. Background [0002] Anti-overload explosives is a class of highly mechanically performing explosives designed for penetration-type munitions, such as 155mm caliber shell charges, deep penetration missiles, etc., studies have shown that the stress of explosive charges in the process of ammunition penetration is usually not more than 1GPa, and the value is far from reaching the impact detonation threshold of explosives (about 7GPa), so the ignition that occurs during the invasion of explosives is usually attributed to the non-impact ignition mechanism, and the non-impact ignition mechanism of the explosives during the invasion process is closely related to the motion state of...
Claims
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