Method for measuring near field blast wave pressure of underwater explosion of explosive

A measurement method and shock wave technology, applied in force/torque/work measuring instruments, measuring devices, instruments, etc., can solve the problems of high test cost, many test data links, expensive instruments and equipment, etc., and achieve simple test components and test results. Simple process and low cost effect

Inactive Publication Date: 2014-09-10
XIAN MODERN CHEM RES INST
View PDF4 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The equipment required for the test cost is expensive, and the test cost is high, which is not conducive to the measurement of the near-field shock wave pressure of a large number of underwater explosions by repeatedly adjusting the formula components and processes and other factors in the initial process of underwater explosive formula design
[0005] (2) The measured pressure is the pressure calculated according to the shock wave velocity in water and the shock Hugo Neo equation of water. There are many links in the test data, and the test accuracy is difficul

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for measuring near field blast wave pressure of underwater explosion of explosive
  • Method for measuring near field blast wave pressure of underwater explosion of explosive
  • Method for measuring near field blast wave pressure of underwater explosion of explosive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment is the near-field pressure measurement of B explosive underwater explosion. The B explosive is 25g, which is formed by melting and casting process. The charge size is φ25mm×30mm. The test method for an explosive pool with a diameter of 3.2 meters and a depth of 2.4 meters includes the following steps;

[0034] Step 1: Select the PVF2-11-.125.EK thin-film stress gauge from American DYNASEN Company, and polish the terminal of the thin-film stress gauge with 200-grit sandpaper to remove the oxide layer. Weld the SYV-50-3-1 type coaxial cable and the terminal of the film strain gauge to ensure that the solder joints must be smooth and welded firmly to prevent false welding. The solder should not be too much, and the welding time should not be too long. Generally, 3- 5 seconds, and there is no danger of breaking, and the solder joints are sealed with waterproof sealant, and waterproof insulating tape is wound to meet the requirements of waterproof and insulat...

Embodiment 2

[0048] The test process is carried out according to Example 1.

[0049] In this test, JH-14 explosive is used to verify the repeatability of the measurement results of this method. The amount of each test charge is 10g, the size of the charge is ф15mm×15mm, and the distance between the lower end of the sample and the sensitive surface of PVDF is 11cm. The test bracket of the sample was put into the pool, and the depth of the sample entering the water was 30cm. A total of 7 tests were carried out. The results obtained are listed in Table 2, and the standard deviation of the obtained test is 8.2%.

[0050] Table 2 Shock wave pressure near field of JH-14 explosive

[0051]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for measuring near field blast wave pressure of underwater explosion of an explosive. The measuring method is characterized in that a thin-film stress gauge is glued on cotton cloth by use of an epoxy adhesive, the thin-film stress gauge is welded with a coaxial cable, the other end of the coaxial cable is connected with a charge amplifier, the charge amplifier is connected with a signal wire, and the other end of the signal wire is connected with a data acquisition instrument. The cotton cloth glued with the thin-film stress gauge is put on a test support, a sample is fixed in a position away from the thin-film stress gauge by a certain distance by use of a cotton thread and an enameled wire, a detonator is connected to the sample, the test support is sunk in water, the technical parameters of the data acquisition instrument are set, the test sample is detonated, and the near field output pressure of underwater explosion of the sample is measured. The method can be applied to testing in a small pool; the test process is simple, and the test data can be obtained directly without secondary deduction. The test components are simple and easy to manufacture, and relatively low in cost. The method is capable of measuring the underwater near field blast wave pressure of samples at a hectogram level.

Description

technical field [0001] The invention belongs to the technical field of propellant and explosives, and in particular relates to a method for measuring the near-field shock wave pressure of explosive underwater explosion. The method can measure the near-field shock wave pressure of explosive underwater explosion. Background technique [0002] The near-field shock wave pressure of the explosion has the characteristics of high peak pressure, fast pressure rise frequency, and rapid expansion of the pressure wave front. The impact of the explosion sparse wave on the shock wave pressure and the adiabatic compression of the high-pressure shock wave on water cause the loss of near-field shock wave energy. Huge, resulting in a very fast drop in near-field shock wave pressure, and a very wide range of shock wave pressure. Therefore, in measurement technology, there are high requirements for the response frequency, range, sensitivity and recording rate of the data acquisition recorder of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01L5/00
Inventor 冯晓军王晓峰徐洪涛余然赵娟田轩封雪松
Owner XIAN MODERN CHEM RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap