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Method for predicting average diameter of energy-gathered jet flow of metal shaped charge liner material and application thereof

A technology of average diameter and prediction method, applied in the field of engineering blasting, can solve the problem of not considering the influence of the jet shape, and achieve the effect of improving the accuracy and improving the optimization speed.

Active Publication Date: 2020-06-23
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the traditional jet theory does not consider the influence of the material itself (including material properties such as strength and plasticity) on the jet shape when calculating the jet shape.

Method used

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  • Method for predicting average diameter of energy-gathered jet flow of metal shaped charge liner material and application thereof
  • Method for predicting average diameter of energy-gathered jet flow of metal shaped charge liner material and application thereof
  • Method for predicting average diameter of energy-gathered jet flow of metal shaped charge liner material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0157] The predicted diameter is 72mm, the wall thickness is 2mm, and the cone angle is the jet average diameter of the oil perforating ammunition cover material of 72°, and the material to be tested is Ti alloy.

[0158] Obtain the high strain rate compressive strength and high strain rate compression fracture strain of the material to be tested through the separated Hopkinson pressure bar (SHPB), the cross-sectional dimensions and the used The material is the same, the cross-sectional diameter is 14.5mm, the elastic modulus of the material is 197.08GPa, and the sound velocity of the longitudinal wave of the material is 5000m / s; the material is processed into a cylindrical sample of Φ4mm×4mm, and the size is Φ14.5mm×150mm driven by 1.2MPa air pressure The cylindrical bullet hits the incident rod, and the measured sample is in the compression state with an average strain rate of 10750 / s, the high strain rate compressive strength is 1200MPa, and the high strain rate compression ...

Embodiment 2

[0164] The predicted diameter is 72mm, the wall thickness is 2mm, and the cone angle is the jet average diameter of the oil perforating ammunition cover material of 72°, and the material to be tested is Cu alloy.

[0165] According to the method test of embodiment 1, the material property data of the material to be tested is as follows: high strain rate compressive strength 700MPa, high strain rate compression fracture strain 0.45, high temperature tensile strength 150MPa, high temperature tensile fracture strain 0.094, longitudinal wave velocity 4423m / s and density 15.35g / cm 3 , the initial volume of the medicine mask is 20.4cm 3 , Substituting the above material property values ​​into the formula II-2, the average diameter of the jet is calculated to be 1.92mm.

[0166] The X-ray diagram of the jet flow process of petroleum perforating ammunition cover material in the present embodiment is as follows Figure 5 As shown, the diameter of the middle part of the jet is about ...

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Abstract

The invention belongs to the technical field of engineering blasting, and particularly relates to a method for predicting the average diameter of jet flow of a metal shaped charge liner and application thereof. The method comprises: on the basis of considering material attributes, constructing a jet flow average diameter-material attribute relational expression according to the stress state in thejet flow forming and moving process of the shaped charge liner and the action mechanism of the material attributes on the jet flow form in the jet flow forming and moving process; substituting the material attribute of the metal material into the jet flow average diameter-material attribute relational expression to obtain a jet flow average diameter-material attribute equation; and substituting the material attribute of the to-be-measured material into the jet flow average diameter-material attribute equation to obtain an average diameter prediction value of the shaped charge liner shaped charge jet flow. According to the prediction method provided by the invention, the influence of material attributes is fused into the prediction process, the problem that the energy-gathered jet flow form difference of different materials cannot be determined by a traditional theory is solved, and the accuracy of a jet flow average diameter prediction result is improved.

Description

technical field [0001] The invention belongs to the technical field of engineering blasting, and in particular relates to a method for predicting the average jet diameter of a metal liner and its application. Background technique [0002] The metal jet is formed by the detonation of the shaped charge to crush the metal liner, and has a slender and axially symmetrical structure. Driven by the detonation of the explosive, the jet can penetrate a solid target through its powerful kinetic energy, and it has been widely used in fields such as military damage, oil exploration, and civil blasting. [0003] According to the traditional jet damage theory, when the target is determined, the damage aperture of the shaped jet to the target is mainly affected by the diameter and velocity of the shaped jet. bigger. Due to the different fields of application of explosives, the requirements for the perforation diameter caused by jet flow are also different: for example, oil perforating bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/10G01M10/00G01N33/20
CPCG01B21/10G01M10/00G01N33/20
Inventor 刘金旭张松蔡奇李树奎贺川冯新娅刘兴伟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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