CN112014391A - Experimental observation method for transient process of shielding explosive by energy-gathered jet detonation - Google Patents
Experimental observation method for transient process of shielding explosive by energy-gathered jet detonation Download PDFInfo
- Publication number
- CN112014391A CN112014391A CN202010795616.8A CN202010795616A CN112014391A CN 112014391 A CN112014391 A CN 112014391A CN 202010795616 A CN202010795616 A CN 202010795616A CN 112014391 A CN112014391 A CN 112014391A
- Authority
- CN
- China
- Prior art keywords
- explosive
- jet
- image
- shielding
- detonation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002360 explosive Substances 0.000 title claims abstract description 112
- 238000005474 detonation Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 51
- 230000008569 process Effects 0.000 title claims abstract description 30
- 230000001052 transient effect Effects 0.000 title claims abstract description 20
- 238000009432 framing Methods 0.000 claims abstract description 53
- 230000000977 initiatory effect Effects 0.000 claims abstract description 14
- 238000004880 explosion Methods 0.000 claims description 29
- 239000000523 sample Substances 0.000 claims description 14
- 239000003550 marker Substances 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 230000002889 sympathetic effect Effects 0.000 claims description 4
- 230000001186 cumulative effect Effects 0.000 claims description 3
- 239000003999 initiator Substances 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 239000011521 glass Substances 0.000 abstract description 6
- 238000005192 partition Methods 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract 2
- 230000006378 damage Effects 0.000 description 6
- 230000000638 stimulation Effects 0.000 description 4
- 239000002243 precursor Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000013401 experimental design Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 229920005372 Plexiglas® Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels; Explosives
- G01N33/227—Explosives, e.g. combustive properties thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention provides an experimental observation method for an initiation transient process of an organic glass explosive initiated by jet flow, wherein in the method, the primary explosive initiated by the initiating explosive is detonated, the explosive type cover is crushed to form jet flow, a trigger signal is simultaneously given to a simultaneous framing scanning camera, when the trigger signal reaches a set trigger value of the simultaneous framing scanning camera, a shutter of the simultaneous framing scanning camera is opened, and a framing image and a scanning image of the process of initiating the organic glass explosive by the jet flow penetrating a partition plate are shot. The experimental observation method can obtain the image information of the jet flow motion, the process of penetrating the organic glass plate and the process of detonating the explosive, and can obtain the specific curve values of the jet flow velocity, the detonation process of the explosive and the like by scanning the image, thereby realizing the more comprehensive description of the transient process of detonating the organic glass explosive by the jet flow.
Description
Technical Field
The invention belongs to the field of explosion and damage, relates to an explosive detonation transient process, and particularly relates to an experimental observation method for an explosive detonation shielding transient process by energy-gathered jet flow.
Background
The energy-gathering warhead mainly utilizes energy-gathering metal jet flow generated by energy-gathering explosive charge to puncture an armor target and destroy personnel and equipment in the armor. The energy-gathered jet flow has high energy density, strong directivity and high local destruction capability, can invade the protective layer and the shell of the ammunition and then detonate the explosive, so the energy-gathered jet flow has attracted wide attention as a blast-proof anti-pilot ammunition warhead destruction element, and develops a series of researches. The detonation modes of the energy-gathered jet flow to shield and explode the target plate mainly comprise two types: firstly, the precursor wave generated when the energy-gathered jet is focused on a target is detonated; and secondly, residual jet flow is detonated after the energy-gathered jet flow punctures the target plate. The impact detonation of the jet flow on the shielding explosive of the homogeneous target plate is mainly in a second detonation form because the jet flow has smaller diameter and the duration of the precursor wave in the penetration process is short, so that the explosive is difficult to directly detonate generally, but the jet flow precursor wave has higher detonation capability for the ammunition with a thinner shell. The current developed jet impact detonation explosive test is mainly to reversely deduce an explosive detonation threshold value characterized by the critical detonation velocity and the detonation energy of the jet by measuring the critical thickness of a shielding plate. For example, Wanglian et al (numerical simulation and test of shield B explosives by shaped-jet detonation, blasting apparatus 2015,44(5):56-60) were tested using the method described above. Information such as detonation waves and the like in the transient process of detonation of the explosive under jet stimulation has important significance for researching the detonation performance of the explosive under the jet stimulation source, however, the experimental observation of the information is not realized at present. The existing high-speed camera technology is limited by the frame frequency of the camera, the measurement precision of the detonation wave speed is relatively low, and the method can only be used for qualitative description of the detonation state of explosive.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an experimental observation method for the transient process of the energy-gathered jet detonation shielding explosive, and solve the technical problem that the experimental method in the prior art is difficult to comprehensively and accurately describe the transient process of the energy-gathered jet detonation shielding explosive.
In order to solve the technical problems, the invention adopts the following technical scheme:
an experimental observation method for transient process of energy-gathered jet detonation shielding explosive, which arranges an energy-gathered jet detonation shielding explosive system in an explosion site, and comprises the following steps:
step one, arranging a cumulative jet detonation shielding explosive device to ensure that a shielding plate and the end face of detonated explosive are horizontal and jet flow vertically enters the shielding plate;
step two, laying a simultaneous framing scanning camera system, and enabling the energy-gathered jet detonation shielding explosive device to be located in the center of a field of view of the simultaneous framing scanning camera system by adjusting a reflecting plane mirror;
thirdly, a trigger probe is arranged on the main explosive and is connected to a simultaneous framing scanning camera system and an oscilloscope through a trigger line, and the distance H from the trigger probe to the lower end face of the shaped charge liner is measured and recorded1And the distance H from the lower end face of the liner to the upper end face of the shielding plate2，H1Is less than the height H of the liner0；
Fourthly, placing a marker in the field of view of the simultaneous framing scanning camera system, determining a scale by comparing the actual size of the marker with the size of the marker in the field of view of the simultaneous framing scanning camera system, and calculating to obtain the distance H from the upper end surface of the shielding plate to the top of the field of view3；
Step five, calculating the time difference delta T between the moment when the jet enters the visual field and the moment when the detonation wave of the main explosive reaches the trigger probe, and setting the time delay of the simultaneous framing scanning camera system by taking the delta T as the reference time difference, wherein the calculation formula is as follows:
in the formula, VjEstimating an average velocity for the jet;
inserting the detonator into the initiating explosive, wherein the tail end of the detonator is connected to the initiator through the initiating wire;
step seven, detonating the detonator through the detonator, crushing the liner to form jet flow after the main explosive is detonated, simultaneously triggering the probe to trigger a signal for the simultaneous framing scanning camera system, and opening a camera shutter to obtain a framing image and a scanning image when the trigger signal reaches a camera set trigger value;
step eight, framing image data processing:
comparing the information between the two images obtained by amplitude division, and dividing the information by the time interval to obtain the jet flow incident speed and the detonation wave speed information of the detonated explosive;
step nine, scanning image data processing:
step 901, extracting continuous data points in a scanned image, and adding a plurality of data points at equal distance interpretation positions at an inflection point;
step 902, calculating the magnification ratio of the image formed on the scanned image, the calculation formula is:
α＝LX/La
β＝LY/Lb
wherein α and β are the respective amplification ratios in the direction of X, Y, LXAnd LYLength of scale in X and Y directions, L, respectivelyaAnd LbRespectively the size of the scale image on the scanned image;
step 903, converting the space two-dimensional information on the scanned image into information in a time-space coordinate:
obtaining the movement time of the jet flow by combining the X-direction magnification factor alpha with the slit distance on the scanned image; the movement distance of jet flow and detonation wave can be obtained through the magnification factor beta in the Y direction and the coordinates of each point on the scanning track, and the movement speed corresponding to each point can be obtained by dividing the measured coordinates in the Y direction in the image by the scanning time;
and 904, on the basis of digital interpretation of the image, combining the scanning speed and the image amplification ratio parameters of the simultaneous framing scanning camera system to obtain specific curve values of the jet velocity, the detonation wave velocity of the detonated explosive and the shock wave velocity in the shielding plate.
The invention also has the following technical characteristics:
the energy-gathered jet detonation shielding explosive system comprises an energy-gathered jet detonation shielding explosive device, a reflecting plane mirror is arranged on one side of the energy-gathered jet detonation shielding explosive device, and a simultaneous framing scanning camera system is arranged outside an explosion protection window of an explosion field;
the device for detonating the shielded explosive by the energy-gathered jet flow comprises a sympathetic explosive column, a detonated explosive, a shielding plate, a shaped charge liner, a main explosive and a detonating explosive column which are sequentially arranged from the bottom to the top.
The explosion site is an explosion tower, and an explosion protection window is arranged on the tower wall of the explosion tower.
The experimental observation method can obtain image information of jet flow, explosive detonation wave and detonation products, and can obtain specific curve values of jet flow velocity, detonation wave velocity and the like by scanning the image, so that the transient process of shielding the explosive by energy-gathered jet flow detonation is comprehensively described.
(II) the framing image can provide two-dimensional space information on sampling points in the whole process, but the time-space information between adjacent frames can be lost; the scanned image can clearly and continuously record the space motion process, but the space information outside the scanning slit can be completely lost, and complete and accurate transient damage process information can be obtained only by combining the two to form parallax-free framing and scanning simultaneous imaging recording. By combining damage data processing and information extraction technologies, useful test information is extracted and distinguished, and information in the framing image and the scanning image is processed in a combined mode, so that the damage process is comprehensively and accurately depicted.
Drawings
FIG. 1 is a schematic layout of the shaped jet detonation screen explosive device of the present invention.
Fig. 2 is a schematic top view of the shaped jet detonation screen explosive system of the present invention.
Fig. 3 is a framed image in an embodiment of the invention.
Fig. 4 is a scanned image in an embodiment of the present invention.
The meaning of the individual reference symbols in the figures is: 1-reflecting plane mirror, 2-explosion protection window, 3-simultaneous framing scanning camera system, 4-energy-gathering jet flow detonation shielding explosive device, 5-explosion tower and 6-camera view field;
401-detonator, 402-trigger probe, 403-initiating charge, 404-main explosive, 405-liner, 406-shield, 407-detonated explosive, 408-sympathetic charge.
The present invention will be explained in further detail with reference to examples.
Detailed Description
The invention relates to an experimental observation method for a transient process of energy-gathered jet detonation shielding explosive, which can be applied to the fields of weapon design, protection and the like, provides a method for observing the transient process of detonation of the explosive under the jet stimulation effect for scientific research personnel and engineering design personnel, and can be applied to experimental design, theoretical analysis and related engineering application of the process of energy-gathered jet detonation shielding explosive.
The invention aims to provide an experimental observation method for the transient process of shielding explosive by energy-gathered jet detonation, which adopts explosive explosion self-luminescence, realizes the observation and recording of the explosive in the transient process of detonation under the action of jet stimulation by simultaneously framing/scanning a camera system, and can be used for experimental design, theoretical analysis and related engineering application in the process of shielding the explosive by energy-gathered jet detonation.
It should be noted that the X direction and the Y direction in the present invention refer to the horizontal direction and the vertical direction in the divided image, respectively.
It should be noted that the simultaneous framing scanning camera system in the present invention adopts a simultaneous framing scanning ultra-high speed photoelectric photographing system known in the prior art, for example, chinese patent with publication number CN103197499B, with patent names: a simultaneous frame-scanning ultra-high speed photoelectric photography system. As another example, a paper (Chang Li Hua et al, intense laser and particle Beam 2015, 27 (11): 115002-1-6), explosive column in-plane flux compression ultrahigh-speed simultaneous framing/scanning photography technique.
It is to be noted that all components in the present invention, unless otherwise specified, are all those known in the art.
In the invention, as shown in fig. 1 and fig. 2, the energy-gathered jet detonation shielding explosive system comprises an energy-gathered jet detonation shielding explosive device 4, a reflecting plane mirror 1 is arranged on one side of the energy-gathered jet detonation shielding explosive device 4, and a simultaneous framing scanning camera system 3 is arranged outside an explosion protection window 2 of an explosion place;
the shaped jet detonation shielding explosive device 4 comprises a sympathetic explosive column 408, a detonated explosive 407, a shielding plate 406, a liner 405, a main explosive 404 and an initiating explosive column 403 which are arranged in sequence from bottom to top.
The explosion place is an explosion tower 5, and an explosion protection window 2 is arranged on the tower wall of the explosion tower 5.
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
Example 1:
the embodiment provides an experimental observation method for a transient process of a shield explosive detonated by a shaped jet, wherein the method arranges a system for detonating the shield explosive by the shaped jet in an explosion field, and comprises the following steps:
step one, arranging a cumulative jet detonation shielding explosive device to ensure that a shielding plate and the end face of detonated explosive are horizontal and jet flow vertically enters the shielding plate;
in this embodiment, the arrangement of the shaped jet detonation shielding explosive device is shown in fig. 1. The main explosive adopts a phi 50 standard jet source, the initiating explosive column is an A explosive column with phi 10 multiplied by 10mm, the initiating mode adopts end face center initiation, and the initiation is carried out through an 8# electric detonator. The partition plate is made of plexiglass with phi 120X 20mm, and the detonated explosive is B explosive column with phi 50X 50 mm. To prevent deviation of the jet from the axis resulting in the detonated explosive not being detonated, a sympathetic explosive column of Φ 50 x 50mm is placed beneath the detonated explosive. And the position and the posture of the device are determined by using a level ruler and a laser level meter, so that the end surfaces of the main explosive column, the organic glass plate and the detonated explosive column are ensured to be horizontal.
Step two, laying a simultaneous framing scanning camera system, and enabling the energy-gathered jet detonation shielding explosive device to be located in the center of a field of view of the simultaneous framing scanning camera system by adjusting a reflecting plane mirror;
in this embodiment, a schematic top view of a shaped jet detonation screen explosive system is shown in fig. 2, and the explosion field is an explosion tower. K9 glass is adopted as the window of the explosion tower, and the reflectivity of the reflecting plane mirror is required to be more than or equal to 90 percent. The plane mirror is placed on the bullet frame to ensure that the plane mirror is at the same height as the window of the explosion tower, the detonated explosive enters the center of the field of view of the simultaneous framing scanning camera by translating and rotating the plane mirror, and the horizontal ruler and the laser level meter are used for determining the coincidence of the jet axis and the bilateral symmetry line of the field of view.
Thirdly, a trigger probe is arranged on the main explosive and is connected to a simultaneous framing scanning camera system and an oscilloscope through a trigger line, and the distance H from the trigger probe to the lower end face of the shaped charge liner is measured and recorded1And the distance H from the lower end face of the liner to the upper end face of the shielding plate2，H1Is less than the height H of the liner0；
In this embodiment, the trigger probe is a thin copper wire. By measurement, H1-16.5 mm, H2-467 mm.
Fourthly, placing a marker in the field of view of the simultaneous framing scanning camera system, determining a scale by comparing the actual size of the marker with the size of the marker in the field of view of the simultaneous framing scanning camera system, and calculating to obtain the distance H from the upper end surface of the shielding plate to the top of the field of view3；
Step five, calculating the time difference delta T between the moment when the jet enters the visual field and the moment when the detonation wave of the main explosive reaches the trigger probe, and setting the time delay of the simultaneous framing scanning camera system by taking the delta T as the reference time difference, wherein the calculation formula is as follows:
in the formula, VjEstimating an average velocity for the jet;
in this embodiment, H is obtained by calculation320mm, jet mean velocity VjThe Δ T calculated by substituting the above equation was 55.18 μ s at 8.4 km/s.
According to the field diameter and the jet speed, the framing scanning camera adopts a 20 mu s gear, the scanning time is 57 mu s to 69.19 mu s, and the framing interval is about 1.67 mu s.
Inserting the detonator into the initiating explosive, wherein the tail end of the detonator is connected to the initiator through the initiating wire;
step seven, detonating the detonator through the detonator, crushing the liner to form jet flow after the main explosive is detonated, simultaneously triggering the probe to trigger a signal for the simultaneous framing scanning camera system, and opening a camera shutter to obtain a framing image and a scanning image when the trigger signal reaches a camera set trigger value;
step eight, framing image data processing:
comparing the information between the two images obtained by amplitude division, and dividing the information by the time interval to obtain the jet flow incident speed and the detonation wave speed information of the detonated explosive;
in this embodiment, 4 amplitude images with an interval of about 1.67 μ s are shown in fig. 3, and the position change of the jet flow and the detonation wave front can be observed through the images, and the jet flow incident velocity and the detonation wave velocity of the detonated explosive can be obtained through calculation.
Step nine, scanning image data processing:
step 901, extracting continuous data points in a scanned image, and adding a plurality of data points at equal distance interpretation positions at an inflection point;
step 902, calculating the magnification ratio of the image formed on the scanned image, the calculation formula is:
α＝LX/La
β＝LY/Lb
wherein α and β are the respective amplification ratios in the direction of X, Y, LXAnd LYLength of scale in X and Y directions, L, respectivelyaAnd LbRespectively the size of the scale image on the scanned image;
step 903, converting the space two-dimensional information on the scanned image into information in a time-space coordinate:
obtaining the movement time of the jet flow by combining the X-direction magnification factor alpha with the slit distance on the scanned image; the movement distance of jet flow and detonation wave can be obtained through the magnification factor beta in the Y direction and the coordinates of each point on the scanning track, and the movement speed corresponding to each point can be obtained by dividing the measured coordinates in the Y direction in the image by the scanning time;
and 904, on the basis of digital interpretation of the image, combining the scanning speed and the image amplification ratio parameters of the simultaneous framing scanning camera system to obtain specific curve values of the jet velocity, the detonation wave velocity of the detonated explosive and the shock wave velocity in the shielding plate.
In this embodiment, the framing image is shown in fig. 3, and the scanning image is shown in fig. 4. As can be calculated from fig. 3 and 4, the scale of the framing image is: alpha is alphaf100/647-0.155 (mm/pixel); the distance scale factor of the scanned image is 0.77 times the framing, i.e. alphas＝0.77αfWhen the image is scanned, the time coefficient is 0.119 (mm/pixel): alpha is alphast17.6/1830-0.00962 (μ s/pixel).
On the basis, the point of the scanning image corresponding to the framing image can be calculated. The object movement speed is calculated by interpreting the time interval between the framing images and compared with the object movement speed calculated according to the scanned image information. In this embodiment, the velocity ratio calculated from the frame image and the scanned image is shown in table 1, taking the jet flow velocity as an example.
TABLE 1 Framed image versus scanned image information for jet motion
Claims (3)
1. An experimental observation method for a transient process of a shaped-jet detonated shielding explosive is characterized in that a shaped-jet detonated shielding explosive system is arranged in an explosion site, and the method comprises the following steps:
step one, arranging a cumulative jet detonation shielding explosive device to ensure that a shielding plate and the end face of detonated explosive are horizontal and jet flow vertically enters the shielding plate;
step two, laying a simultaneous framing scanning camera system, and enabling the energy-gathered jet detonation shielding explosive device to be located in the center of a field of view of the simultaneous framing scanning camera system by adjusting a reflecting plane mirror;
thirdly, a trigger probe is arranged on the main explosive and is connected to a simultaneous framing scanning camera system and an oscilloscope through a trigger line, and the distance H from the trigger probe to the lower end face of the shaped charge liner is measured and recorded1And the distance H from the lower end face of the liner to the upper end face of the shielding plate2，H1Is less than the height H of the liner0；
Fourthly, placing a marker in the field of view of the simultaneous framing scanning camera system, determining a scale by comparing the actual size of the marker with the size of the marker in the field of view of the simultaneous framing scanning camera system, and calculating to obtain the distance H from the upper end surface of the shielding plate to the top of the field of view3；
Step five, calculating the time difference delta T between the moment when the jet enters the visual field and the moment when the detonation wave of the main explosive reaches the trigger probe, and setting the time delay of the simultaneous framing scanning camera system by taking the delta T as the reference time difference, wherein the calculation formula is as follows:
in the formula, VjEstimating an average velocity for the jet;
inserting the detonator into the initiating explosive, wherein the tail end of the detonator is connected to the initiator through the initiating wire;
step seven, detonating the detonator through the detonator, crushing the liner to form jet flow after the main explosive is detonated, simultaneously triggering the probe to trigger a signal for the simultaneous framing scanning camera system, and opening a camera shutter to obtain a framing image and a scanning image when the trigger signal reaches a camera set trigger value;
step eight, framing image data processing:
comparing the information between the two images obtained by amplitude division, and dividing the information by the time interval to obtain the jet flow incident speed and the detonation wave speed information of the detonated explosive;
step nine, scanning image data processing:
step 901, extracting continuous data points in a scanned image, and adding a plurality of data points at equal distance interpretation positions at an inflection point;
step 902, calculating the magnification ratio of the image formed on the scanned image, the calculation formula is:
α＝LX/La
β＝LY/Lb
wherein α and β are the respective amplification ratios in the direction of X, Y, LXAnd LYLength of scale in X and Y directions, L, respectivelyaAnd LbRespectively the size of the scale image on the scanned image;
step 903, converting the space two-dimensional information on the scanned image into information in a time-space coordinate:
obtaining the movement time of the jet flow by combining the X-direction magnification factor alpha with the slit distance on the scanned image; the movement distance of jet flow and detonation wave can be obtained through the magnification factor beta in the Y direction and the coordinates of each point on the scanning track, and the movement speed corresponding to each point can be obtained by dividing the measured coordinates in the Y direction in the image by the scanning time;
and 904, on the basis of digital interpretation of the image, combining the scanning speed and the image amplification ratio parameters of the simultaneous framing scanning camera system to obtain specific curve values of the jet velocity, the detonation wave velocity of the detonated explosive and the shock wave velocity in the shielding plate.
2. The experimental observation method for the transient process of the energy-gathered jet ignition shielding explosive according to claim 1, wherein the energy-gathered jet ignition shielding explosive system comprises an energy-gathered jet ignition shielding explosive device, a reflecting plane mirror is arranged on one side of the energy-gathered jet ignition shielding explosive device, and a simultaneous framing scanning camera system is arranged outside an explosion protection window of an explosion field;
the device for detonating the shielded explosive by the energy-gathered jet flow comprises a sympathetic explosive column, a detonated explosive, a shielding plate, a shaped charge liner, a main explosive and a detonating explosive column which are sequentially arranged from the bottom to the top.
3. The experimental observation method for the transient process of the shaped jet detonation shielding explosive according to claim 2, wherein the explosion field is an explosion tower, and an explosion protection window is arranged on the tower wall of the explosion tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010795616.8A CN112014391B (en) | 2020-08-10 | 2020-08-10 | Experimental observation method for transient process of energy-gathering jet detonating shielding explosive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010795616.8A CN112014391B (en) | 2020-08-10 | 2020-08-10 | Experimental observation method for transient process of energy-gathering jet detonating shielding explosive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112014391A true CN112014391A (en) | 2020-12-01 |
| CN112014391B CN112014391B (en) | 2023-07-18 |
Family
ID=73499341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010795616.8A Active CN112014391B (en) | 2020-08-10 | 2020-08-10 | Experimental observation method for transient process of energy-gathering jet detonating shielding explosive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112014391B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1312316A (en) * | 1961-01-25 | 1962-12-14 | Jet Res Ct | Apparatus for testing explosive devices by stereoscopic photography |
| CN104181159A (en) * | 2014-08-25 | 2014-12-03 | 西安近代化学研究所 | Grid detonation waveform scanning and testing method |
| US20180113106A1 (en) * | 2016-10-21 | 2018-04-26 | Bernard Gorski | Devices and methods for detecting an explosive substance |
| CN111356909A (en) * | 2017-11-16 | 2020-06-30 | 多传感器科学公司 | System and method for multispectral imaging and gas detection using scanning illuminator and optical sensor |
-
2020
- 2020-08-10 CN CN202010795616.8A patent/CN112014391B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1312316A (en) * | 1961-01-25 | 1962-12-14 | Jet Res Ct | Apparatus for testing explosive devices by stereoscopic photography |
| CN104181159A (en) * | 2014-08-25 | 2014-12-03 | 西安近代化学研究所 | Grid detonation waveform scanning and testing method |
| US20180113106A1 (en) * | 2016-10-21 | 2018-04-26 | Bernard Gorski | Devices and methods for detecting an explosive substance |
| CN111356909A (en) * | 2017-11-16 | 2020-06-30 | 多传感器科学公司 | System and method for multispectral imaging and gas detection using scanning illuminator and optical sensor |
Non-Patent Citations (1)
| Title |
|---|
| 王利侠;周涛;贺海民;周玲;: "聚能射流引爆屏蔽B炸药的数值模拟及试验", 爆破器材, no. 05 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112014391B (en) | 2023-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111983178B (en) | Experimental observation method for transient process of explosive partition plate impact initiation | |
| RU2131583C1 (en) | Process testing fragmentation ammunition with circular field of scattering of splinters and stand for its realization | |
| CN111829403B (en) | Experimental observation method for explosive forming projectile transient damage process | |
| CN112013728B (en) | Experimental method for transient process of fragment cloud generated by high-speed jet collision on target plate | |
| CN108775998A (en) | A kind of system and method measuring hypervelocity impact panus three-dimensional structure | |
| CN112014391A (en) | Experimental observation method for transient process of shielding explosive by energy-gathered jet detonation | |
| CN112014390A (en) | Experimental observation method for explosive explosion loading fragment transient process | |
| CN115289920B (en) | Active composite shaped charge liner shaped charge damage effect testing device and method | |
| CN112504033A (en) | Device and method for testing underwater explosion bubble energy of electronic detonator | |
| Bourne et al. | On the one-dimensional recovery and microstructural evaluation of shocked alumina | |
| Ahmed et al. | Penetration evaluation of explosively formed projectiles through air and water using insensitive munition: Simulative and experimental studies | |
| CN114739242A (en) | Submillimeter-level heavy metal particle group front edge speed testing system and method | |
| CN115200427B (en) | Method for representing equivalent weight of impact wave energy of underwater explosion of explosive | |
| Borg et al. | In situ characterization of projectile penetration into sand | |
| Borg et al. | In situ characterization of projectile penetration into sand targets | |
| Mellen et al. | Blast and fragmentation loading indicative of a VBIED surrogate for structural panel response analysis | |
| Simioni et al. | Assessing weak layer failure and changes in snowpack properties due to avalanche control by explosives | |
| RU2627346C1 (en) | Parameters determination method of splinter battlefield three-d distributed elements | |
| CN118500216B (en) | Comprehensive damage power observation method for energy-gathering jet flow | |
| Saburi et al. | Dynamic response analysis of mortar block under blast loading using digital image correlation | |
| Jamroziak et al. | Analysis of punching process of ballistic shield with the use of finite element method | |
| Aldas et al. | The usage of ground penetrating radar (GPR) in designing blast pattern | |
| RU69226U1 (en) | MULTIFUNCTIONAL MEASURING COMPLEX FOR MEASURING CHARACTERISTICS OF A FAST-MOVING OBJECT | |
| Künzel et al. | Simple flash screens for shaped charge jet and flyer velocity measurements | |
| Sweklej et al. | Radar Method of Measuring the Velocity of the Fragments. Sustainability 2023, 15, 951 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |