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Test method for near-field energy distribution characteristics of cylindrical charges

An energy distribution, cylindrical technology, applied in the direction of material explosiveness, etc., can solve problems such as error expansion, difficulty in ensuring the accuracy of impulse values, and inability to obtain near-field overpressure data of explosions, achieving the effect of small errors and convenient measurement.

Inactive Publication Date: 2018-10-12
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the experimental research on the distribution of energy output in the near field of cylindrical explosive charges is generally to measure the shock wave overpressure distribution and integrate the time to obtain the impulse distribution. Due to harsh environmental factors, ordinary overpressure sensors can only measure the overpressure in the middle and far fields but cannot obtain overpressure data in the near field of the explosion. Sensors that have undergone certain protection treatments can obtain overpressure data, but the overpressure measurement is a dynamic measurement, in a few microseconds The overpressure rises to tens to thousands of kilopascals within tens of microseconds, which puts high demands on the test system and will inevitably bring about large errors. After integrating the overpressure-time curve, the error will further expand, and the calculation The accuracy of the obtained impulse value is difficult to guarantee

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  • Test method for near-field energy distribution characteristics of cylindrical charges
  • Test method for near-field energy distribution characteristics of cylindrical charges

Examples

Experimental program
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Effect test

Embodiment 1

[0021] In order to measure the energy distribution law of the vertical section of the cylindrical charge under the condition of detonation at one end point, the test steps are as follows:

[0022] Step 1: Arrange the shooting range according to the schematic diagram. The test layout is as figure 1 As shown, the cylindrical bare powder column is B explosive with a density of 1.65g / cm 3 , the radius is 55mm, the length is 180mm, the aspect ratio is 1.64, and the mass is 2.8kg. The cylindrical charge is placed across the rack. Taking the symmetrical axis of the cylindrical charge as the dividing line, the distance from the center of the cylindrical charge on both sides is 0.8m (that is, 0.57m / kg 1 / 3 ) and 1.2m (ie 0.85m / kg 1 / 3 ) place 180° semi-circular brackets respectively. The size of the aluminum block is 5cm×10cm×10cm, placed vertically with a 5cm×10cm face facing the blast center, and densely distributed on the two semi-circular supports. Calibrate with a laser liner ...

Embodiment 2

[0028] In order to measure the energy distribution law of the vertical section of the cylindrical charge under the condition of central point detonation, the test steps are as follows:

[0029] Step 1: Arrange the shooting range according to the schematic diagram. The schematic diagram of the test layout is as figure 1 As shown, the cylindrical bare powder column is TNT explosive with a density of 1.65g / cm 3 , the radius is 45mm, the length is 180mm, the aspect ratio is 2, and the mass is 1.9kg. The cylindrical charge is placed across the rack. Taking the symmetrical axis of the cylindrical charge as the dividing line, the distance from the center of the cylindrical charge on both sides is 0.62m (that is, 0.5m / kg 1 / 3 ) and 1.5m (ie 1.2m / kg 1 / 3 ) place 180° semi-circular brackets respectively. The size of the aluminum block is 5cm×10cm×10cm, placed vertically with a 5cm×10cm face facing the blast center, and densely distributed on the two semi-circular supports. The cente...

Embodiment 3

[0035] In order to measure the law of energy distribution in the cross-section of the cylindrical charge under the condition of eccentric ±45° double-line detonation, the test steps are as follows:

[0036] Step 1: Arrange the shooting range according to the schematic diagram. The test layout is as figure 2 As shown, the cylindrical bare powder column is B explosive with a density of 1.65g / cm 3 , the radius is 46mm, the length is 138mm, the aspect ratio is 1.5, and the mass is 1.5kg. The cylindrical charge is placed vertically on the bomb rack. At a distance of 1.2m from the center of the cylindrical charge (ie 1.05m / kg 1 / 3 ) place a 360° ring bracket. The size of the aluminum block is 5cm×10cm×10cm, and it is placed vertically with the face of 5cm×10cm facing the blast center, densely distributed on the ring support. Calibrate with a laser liner so that the center of mass of the cylindrical charge and the center of mass of the aluminum block are at the same height, with...

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Abstract

The invention discloses a method for testing cylindrical charging near-field energy distribution character for solving the problem that the overpressure and impulse of shock waves of the explosive near field cannot be measured easily in the prior art. The method comprises the following steps: I. arranging a testing apparatus composed of a cylindrical charge (1), aluminum blocks (2), an annular support (3) and an elastic frame (4), wherein the elastic frame (4) is arranged at the center, the cylindrical charge (1) is arranged on the elastic frame (4), the annular support (3) having a certain radius is arranged at the periphery of the cylindrical charge (1), the aluminum blocks (2) are densely distributed on the annular support, and the mass center of the aluminum block (2) and the mass center of the cylindrical charge are positioned on the same horizontal plane; II. checking whether the electrical conduction property of a detonating wire is a good condition by a universal meter and testing whether a detonator is in a good condition by a detonator meter; III. loading a primer detonator for preparation of explosion initiation; IV: initiating explosion; and V, measuring a throwing distance of the aluminum block by a tape measure and carrying out data processing to obtain the cylindrical charging near-field energy distribution law. The method is used for testing cylindrical explosive charging near-field energy distribution law.

Description

technical field [0001] The invention belongs to the technical field of explosion impact testing, and mainly relates to a method for measuring the near-field energy output distribution characteristics of a cylindrical charge, specifically a method for measuring the throwing distance of surrounding aluminum blocks after a cylindrical charge explodes and calculating the kinetic energy of the aluminum block distribution and then obtain the method of cylindrical charge energy distribution law. Background technique [0002] Since the anti-aircraft and anti-missile warhead is generally cylindrical, it is of great significance to study the energy output distribution of cylindrical charges in various situations to guide the warhead design and improve the energy utilization rate of explosives. At present, the experimental research on the distribution of energy output in the near field of cylindrical explosive charges is generally to measure the shock wave overpressure distribution and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/54
CPCG01N25/54
Inventor 梁晓璐梁争峰唐成程淑杰郑雄伟
Owner XIAN MODERN CHEM RES INST