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Experimental system and method for simulating explosion shock wave and single fragment composite load

An explosion shock wave and composite load technology, used in instruments, measuring devices, scientific instruments, etc., can solve the problem of inability to simulate the coupling effect of shock waves and fragments, and achieve the effect of strong repeatability and low cost

Active Publication Date: 2020-05-22
福建卓航特种设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an alternative technology for explosive loading, foamed aluminum bullet impact loading technology can realize explosive wave loading with different impulses, but the disadvantage is that it cannot simulate the coupling effect of shock wave and fragments

Method used

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  • Experimental system and method for simulating explosion shock wave and single fragment composite load
  • Experimental system and method for simulating explosion shock wave and single fragment composite load
  • Experimental system and method for simulating explosion shock wave and single fragment composite load

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] In order to simulate the compound load at 2m when a 100kg shelled bomb with 50% TNT explodes, first calculate the load parameters of the bomb at 2m: the shock wave peak value is 12MPa, the decay time is 1.4ms, and the specific kinetic energy of 8g fragments is 2.3MJ / m 2 , the time interval between shock wave and fragment reaching 2m is 0.24ms. According to the above parameters, the parameters of the composite projectile are calculated as follows: the density of the aluminum foam projectile is 270kg / m 3 , crushing platform stress 1.2MPa, length 98.0mm, opening diameter 8.4mm, depth 65.0mm, fragment simulation projectile length 20.0mm, diameter 8.0mm and composite projectile launch speed 170m / s.

[0085] According to the parameters of the composite projectile obtained above, the composite projectile is prepared and launched from the first-stage light gas gun at a speed of 170m / s, so as to form the required composite load at the projectile landing site.

Embodiment 2

[0087] In order to simulate the composite load at 0.5m when an 8kg landmine with 50% TNT explodes, first calculate the load parameters at 0.5m after the mine explodes: the peak value of the shock wave is 66MPa, the decay time is 0.35ms, and the specific kinetic energy of the 2g fragment is 3.2MJ / m 2 , the time interval between shock wave and fragment reaching 0.5m is 0.05ms. According to the above parameters, the parameters of the composite projectile are calculated as follows: the density of the aluminum foam projectile is 324kg / m 3 , The crushing platform stress is 1.7MPa, the length is 70mm, the diameter of the opening is 8.4mm, and the depth is 25mm, the length of the fragment simulation projectile is 5mm, the diameter is 8mm, and the launch speed of the composite projectile is 400m / s.

[0088] Prepare the compound projectile according to the parameters of the compound projectile obtained above and launch it from the first-stage light gas cannon at a speed of 400m / s, so a...

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Abstract

The invention discloses an experimental system and a method for simulating a composite load of an explosion shock wave and a single fragment. The method comprises steps of: determining parameters, such as the density and the length of a foamed aluminum projectile, the diameter and the depth of an opening, the length and the diameter of a fragment simulated projectile, and the launch speed of a composite projectile, according to the composite load parameters of the shock wave and the fragment desired simulated; preparing a composite projectile based on the determined composite projectile parameters; and ejecting the prepared composite projectile out of the primary light gas gun at the determined speed, thereby forming a composite load of the shock wave and the single fragment desired simulated. According to the experimental system and the method for simulating the composite load of the explosion shock wave and the single fragment a method for scientific researchers and engineering designers to simulate the explosive power of an explosive device with a shell is provided. The method can be widely applied to the simulation test of explosive impact loads in the fields of the transportation, the safety protection, the military, and the like; can effectively save the test cost; and has considerable economic benefits.

Description

technical field [0001] The invention belongs to the technical field of explosion and impact load test loading, and in particular relates to an experimental system and method for simulating the composite load of an explosion shock wave and a single fragment, especially in a laboratory that can simulate real landmines, missiles, improvised explosive devices, etc. with shells The load resulting from the detonation of the charge. Background technique [0002] The dynamic response of structures under the explosion of shelled charges such as landmines, missiles, and improvised explosive devices is an important research topic that widely exists in the fields of transportation, security protection, and military affairs, and has attracted extensive attention from researchers from all over the world. However, experimental research on this topic lags far behind theoretical and numerical methods. The reason is that the explosive tests of shelled charges such as landmines, missiles and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/02G01N3/313
CPCG01N3/02G01N3/313
Inventor 张钱城卢天健李朗赵振宇张瑞王昕赵中南韩宾金峰
Owner 福建卓航特种设备有限公司
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