CN111982759A - Explosive wave loading experimental device - Google Patents
Explosive wave loading experimental device Download PDFInfo
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- CN111982759A CN111982759A CN202010851883.2A CN202010851883A CN111982759A CN 111982759 A CN111982759 A CN 111982759A CN 202010851883 A CN202010851883 A CN 202010851883A CN 111982759 A CN111982759 A CN 111982759A
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- 239000002360 explosive Substances 0.000 title claims abstract description 69
- 239000008187 granular material Substances 0.000 claims abstract description 8
- 239000003999 initiator Substances 0.000 claims description 27
- 238000004880 explosion Methods 0.000 claims description 25
- 239000002245 particle Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 14
- 230000001360 synchronised effect Effects 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 5
- 238000002474 experimental method Methods 0.000 claims description 4
- 238000005474 detonation Methods 0.000 claims description 3
- 239000011236 particulate material Substances 0.000 description 12
- 239000012634 fragment Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000000977 initiatory effect Effects 0.000 description 3
- SPSSULHKWOKEEL-UHFFFAOYSA-N 2,4,6-trinitrotoluene Chemical compound CC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O SPSSULHKWOKEEL-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000005341 toughened glass Substances 0.000 description 2
- 239000000015 trinitrotoluene Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
-
- 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
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The application provides an explosive wave loading experimental apparatus, includes: an explosive device and a loading platform; the loading platform comprises a first panel and a second panel, explosives and granular materials are arranged between the first panel and the second panel, the explosive device is used for detonating the explosives to generate an explosive wave, so that the explosive wave loads the granular materials, and the granular materials are loaded in a throwing and dispersing mode.
Description
Technical Field
The invention relates to the technical field of explosion initiation, in particular to an explosion wave loading experimental device.
Background
The throwing and dispersing of the granular substances are widely applied in the aspects of natural disasters, civilian use, military engineering and industrial safety, such as the early-stage throwing processes of volcanic eruption volcanic ash in nature, powder fire extinguishing agents in civilian use, cloud explosion bombs in national defense and military use, warm-pressing bombs and the like, dust raising generated by impacting particles in dust explosion, the throwing of fire extinguishing particles in superfine fire extinguishing agents and the like. The core problem is the fundamental scientific problems of interface instability of the particle material under the action of impact load, particle jet growth evolution and the like.
The research on the process of throwing and dispersing the granular materials by the reasonably and effectively designed loading device is the key for promoting the development of civil and military engineering and preventing natural and industrial injuries.
Disclosure of Invention
In view of the above, there is a need for an apparatus for loading blast waves, which can load the scattering and dispersion of the particulate material.
An embodiment of the present application provides an explosion wave loading experimental apparatus, including: an explosive device and a loading platform;
the loading platform comprises a first panel and a second panel, and explosives and granular materials are arranged between the first panel and the second panel;
the explosive device is used for detonating the explosive substance to generate an explosive wave, so that the explosive wave loads the particle material.
According to some embodiments of the present application, the explosive device comprises an initiator;
or, the explosive device comprises an initiator and the explosive;
the initiator is used for detonating the explosive to generate an explosion wave.
According to some embodiments of the present application, a through hole is provided on the first panel;
the through hole is used for placing the initiator.
According to some embodiments of the present application, the apparatus further comprises a collection system;
the acquisition system comprises a pressure sensor and an acquisition device;
the pressure sensor is used for detecting the air pressure when the particle materials are loaded by the explosion waves;
the acquisition device is electrically connected with the pressure sensor and is used for acquiring data detected by the pressure sensor.
According to some embodiments of the present application, the apparatus further comprises a camera device;
the camera device is arranged above the loading platform and used for shooting when the particle materials are loaded by the explosion waves.
According to some embodiments of the present application, the apparatus further comprises a synchronous controller;
the synchronous controller is electrically connected with the initiator, the acquisition device and the camera device so as to realize synchronous control of the initiator, the acquisition device and the camera device.
According to some embodiments of the present application, the loading platform further comprises a support;
the bracket is used for supporting the first panel and the second panel.
According to some embodiments of the present application, the collection system further comprises a tempered housing; the toughened shell comprises a cavity, an opening for communicating the outside with the cavity and a cover plate for opening and closing the opening;
the pressure sensor is arranged on the cover plate;
the collecting device is contained in the containing cavity.
According to some embodiments of the present application, the imaging device includes a camera and a sealed transparent protective cover;
the camera is contained in the protective cover.
According to some embodiments of the present application, the first panel and the second panel are round transparent panels, and the spacing between the first panel and the second panel is no more than 10 mm.
According to the blast wave loading experimental device provided by the embodiment of the application, after the explosive is detonated by the initiator, blast waves are generated on the loading platform, and the loading process of the blast waves on the particle materials is observed through the loading platform. So, the blast wave loading experimental apparatus that this application embodiment provided, structural design is reasonable, and loads particulate material's shedding, dispersion. And by controlling the amount of explosive, different loading pressures can be achieved.
Drawings
Fig. 1 is a schematic structural diagram of an explosive wave loading experimental apparatus according to an embodiment of the present application.
Fig. 2 is a graph of experimental results according to an embodiment of the present application.
FIG. 3 is a graph of another experimental result according to an embodiment of the present application.
Description of the main elements
Blast wave loading experimental apparatus 100
Loading platform 20
Explosive 12
Through hole 23
Toughened housing 33
The volume 331
The following detailed description will further illustrate the present application in conjunction with the above-described figures.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application.
All other embodiments that can be obtained by a person skilled in the art without inventive step based on the embodiments in this application are within the scope of protection of this application.
Referring to fig. 1, an embodiment of the present application provides an explosive wave loading experiment apparatus 100, which includes an explosive device 10, a loading platform 20, an acquisition system 30, a camera device 40, and a synchronous controller 50.
In the embodiment of the present application, the explosive device 10 includes an initiator 11 and an explosive 12, the initiator 11 is used for initiating the explosive 12 to generate an explosive wave, so that a large amount of energy is released in a short time, a large amount of gas is released, and a high pressure chemical or state change is caused in a surrounding medium, and compared with the previous loading of Mpa magnitude, the loading energy of the whole explosive wave loading experimental device 100 is increased to GPa magnitude by the explosive device 10.
In one possible implementation, the explosive device 10 includes the initiator 11, and the initiator 11 detonates explosives 12 disposed within a loading platform 20.
In the embodiment of the present application, the initiator 11 may be a detonator, such as an electronic detonator, and the initiation process is controlled by an electronic control module.
In the embodiment of the present application, the explosive 12 is a substance that is violently burned (i.e., exploded) in a very short time, and is exploded by its own energy under the action of certain external energy, and the explosive 12 may be a explosive column, such as Trinitrotoluene (TNT).
The loading platform 20 comprises a first panel 21 and a second panel 22 which are arranged at intervals, a through hole 23 is arranged on the first panel 21, the through hole 23 is used for placing the initiator 11, the initiator 11 is inserted into the through hole 23 to be contacted with the explosive 12 through the through hole 23, the explosive 12 is placed on the second panel 22, the explosive 12 is arranged between the first panel 21 and the second panel 22 and is opposite to the through hole 23, and a particle material 60 is arranged around the explosive 12, so that the explosion wave generated between the first panel 21 and the second panel 22 loads the particle material 60, wherein the particle material 60 comprises any one of solid particles, liquid or solid-liquid mixture.
According to some embodiments of the present application, the spacing between the first panel 21 and the second panel 22 is no more than 10 mm.
In one possible implementation, the loading platform 20 further includes a spacer disposed between the first panel 21 and the second panel 22 for spacing the first panel 21 and the second panel 22 apart to form a gap for accommodating the particulate material 60.
In the present embodiment, the interval between the first panel 21 and the second panel 22 is not more than 10mm, and is negligible based on the thin interval, and thus can be regarded as a quasi-two-dimensional structure.
According to some embodiments of the present application, the first panel 21 and the second panel 22 are round transparent panels, for example, the first panel 21 and the second panel 22 may be round tempered glass.
According to some embodiments of the present application, the loading platform 20 further comprises a bracket 24, and the bracket 24 is used for supporting the first panel 21 and the second panel 22.
The detonation wave explosion process is briefly described below:
inserting the initiator 11 into the through hole 23 of the first panel 21, placing the explosive 12 and the particulate material 60 on the second panel 22, after the initiator 11 detonates the explosive 12, generating an explosive wave between the first panel 21 and the second panel 22, transmitting the explosive wave to the first panel 21 to be reflected back to the second panel 22, generating a complex flow field in a reflection area to form a mach reflection between the first panel 21 and the second panel 22, forming a stable shock wave to radially propagate around between the first panel 21 and the second panel 22 after the complex incident reflection, realizing radial loading of the particulate material 60, and obtaining different and repeatable loading pressures by controlling the amount of the explosive 12.
According to some embodiments of the present application, the collecting system 30 includes a pressure sensor 31 and a collecting device 32, the pressure sensor 31 is used for detecting the air pressure when the explosion wave loads the particulate material 60, and the collecting device 32 is electrically connected to the pressure sensor 31 for collecting the data detected by the pressure sensor 31.
In one possible implementation, the collection system 30 further includes a signal conditioner (not shown), and the signal generated by the pressure sensor 31 passes through the signal conditioner, and the signal of the signal conditioner is input to the collection device 32 through a tee joint to collect the pressure signal.
According to some embodiments of the present application, the acquisition system 30 further comprises a tempered housing 33; the tempered shell 33 comprises a containing cavity 331, an opening 332 communicating the outside with the containing cavity 331, and a cover plate for opening and closing the opening 332, the pressure sensor 31 is arranged on the cover plate, and the acquisition device 32 is accommodated in the containing cavity 331.
In the embodiment of the present application, the collecting device 32 is placed in the cavity 331 through the opening 332, and the opening 332 is closed by the cover plate. The cavity 331 can be formed by a toughened material, and the acquisition device 32 is sealed by the toughened material and the cover plate, so that the acquisition device 32 is prevented from being damaged by explosion waves.
In the embodiment of the present application, the blast wave loading experiment apparatus 100 is located in an explosion chamber (not shown), and when the explosion apparatus 10 explodes, the pressure sensor 31 detects air pressure data in the explosion chamber and transmits the detected air pressure data to the collecting apparatus 32.
According to some embodiments of the present application, the camera device 40 is disposed above the loading platform 20, and is used for shooting when the blast wave loads the particulate material 60.
According to some embodiments of the present disclosure, the image capturing device 40 includes a camera 41 and a sealed transparent protective cover 42, the camera 41 is housed in the protective cover 42, the camera 41 can be a high-speed camera 41, the shooting frame rate is 10000fps, the resolution is 1024 × 1024pixels, and the exposure time is 1/20000 s. The protective cover 42 is made of tempered glass, and seals the camera 41, so that the damage of explosion waves to the camera 41 is avoided.
According to some embodiments of the present application, the synchronization controller 50 is electrically connected to the initiator 11, the acquisition device 32 and the camera device 40 to achieve synchronization control of the initiator 11, the acquisition device 32 and the camera device 40.
In the embodiment of the present application, the synchronous controller 50 outputs a control signal divided into three paths of level signals, one path triggers the initiator 11 to ignite, one path triggers the collecting device 32 to collect pressure, and the other path triggers the camera 41 to shoot. Based on the fact that the storage of the camera 41 for the high-speed camera 41 is small, the camera 41 can be triggered to shoot in a delayed mode, and the delay time is 1 us. The shot is taken when the particle material 60 is loaded by the blast wave generated after the explosion of the explosive 12.
The working process of the blast wave loading experimental apparatus 100 is briefly described as follows:
inserting the initiator into the through hole 23 of the first panel 21, placing the explosive 12 on the second panel 22, the explosive 12 facing the through hole 23 of the first panel 21, placing the particulate material 60 around the explosive 12, the thickness of the particulate material 60 being equal to the spacing between the first panel 21 and the second panel 22. A synchronous controller 50 placed outside the explosion chamber outputs a control signal to control the explosives to detonate the explosives 12, and at the same time, the acquisition device 32 is controlled to acquire data detected by the pressure sensor 31, so that explosion waves are generated between the first panel 21 and the second panel 22, the explosion waves are radially diffused all around to push the granular materials 60 to radially move all around, the pressure sensor 31 detects the air pressure of the explosion chamber and acquires the detected data through the acquisition device 32, and the shooting device 40 shoots the process that the explosion waves push the granular materials 60 to radially move all around.
Referring to fig. 2, by means of image processing, image binarization, contour extraction, distance conversion and the like on the image captured by the camera 41, it is found that when the amount of explosive 12 is 10g, the particulate material 60 is fragments, and the mass of the fragments is 150g, the velocity of the particulate material varies with the distance from the center of the through hole 23, and the maximum velocity of the jet head is 88m/s, but the velocity decreases with the distance from the fragments to the through hole, and the attenuation coefficient α is fitted to be about 0.401 according to the formula v0e- α x.
Referring to fig. 3, the maximum speed of the fragments for different explosive charges is shown. Under the condition of different loading of the explosive 12, the maximum speed of the fragments reaches 135m/s at the maximum when the loading is 20g, and the maximum speed of the fragments reaches 43m/s at the minimum when the loading is 5 g. The experiment also compares the regular glass bead micro-fragments with the irregular glass sand micro-fragments, and the result shows that the irregular fragments attenuate more quickly, and the attenuation coefficient is about 0.42.
The blast wave loading experimental device 100 provided by the embodiment of the application obtains blast waves by detonating explosives 12, realizes loading at a Gpa magnitude, obtains different and repeatable loading pressures by controlling the explosive amount of the explosives 12, realizes a radial, quasi-two-dimensional and adjustable detonation loading mode by using the loading platform 20, and realizes synchronous acquisition of pressure data and image data by using the synchronous controller 50.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. An explosive wave loading experimental device, characterized by comprising: an explosive device and a loading platform;
the loading platform comprises a first panel and a second panel, and explosives and granular materials are arranged between the first panel and the second panel;
the explosive device is used for detonating the explosive substance to generate an explosive wave, so that the explosive wave loads the particle material.
2. The blast wave loading experimental apparatus of claim 1 wherein said explosive device comprises an initiator;
or, the explosive device comprises an initiator and the explosive;
the initiator is used for detonating the explosive to generate an explosion wave.
3. The apparatus according to claim 2, wherein the first panel is provided with a through hole;
the through hole is used for placing the initiator.
4. The detonation wave loading experimental apparatus of any one of claims 1 to 3, further comprising a collection system;
the acquisition system comprises a pressure sensor and an acquisition device;
the pressure sensor is used for detecting the air pressure when the particle materials are loaded by the explosion waves;
the acquisition device is electrically connected with the pressure sensor and is used for acquiring data detected by the pressure sensor.
5. The blast wave loading experimental apparatus of claim 4, further comprising a camera device;
the camera device is arranged above the loading platform and used for shooting when the particle materials are loaded by the explosion waves.
6. The apparatus for performing blast wave loading experiments according to claim 5 further comprising a synchronization controller;
the synchronous controller is electrically connected with the initiator, the acquisition device and the camera device so as to realize synchronous control of the initiator, the acquisition device and the camera device.
7. The blast wave loading experimental apparatus of claim 1 wherein said loading platform further comprises a support;
the bracket is used for supporting the first panel and the second panel.
8. The blast wave loading experimental apparatus of claim 4, wherein said collection system further comprises a tempered shell; the toughened shell comprises a cavity, an opening for communicating the outside with the cavity and a cover plate for opening and closing the opening;
the pressure sensor is arranged on the cover plate;
the collecting device is contained in the containing cavity.
9. The apparatus according to claim 5, wherein the image capturing device comprises a camera and a sealed transparent protective cover;
the camera is contained in the protective cover.
10. The blast wave loading experimental apparatus of claim 1, wherein said first panel and said second panel are round transparent panels, and a distance between said first panel and said second panel is not more than 10 mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010851883.2A CN111982759B (en) | 2020-08-21 | 2020-08-21 | Explosive wave loading experimental device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010851883.2A CN111982759B (en) | 2020-08-21 | 2020-08-21 | Explosive wave loading experimental device |
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| CN111982759A true CN111982759A (en) | 2020-11-24 |
| CN111982759B CN111982759B (en) | 2023-08-22 |
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| US9714817B1 (en) * | 2015-03-06 | 2017-07-25 | The United States Of America As Represented By The Secretary Of The Navy | Central initiating charge |
| CN107796645A (en) * | 2017-10-20 | 2018-03-13 | 安徽理工大学 | A kind of method of testing of cavity body structure to Gas Detonation wave absorption effect |
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| CN109001056A (en) * | 2018-07-27 | 2018-12-14 | 北京理工大学 | impact loading experiment device |
| CN109001055A (en) * | 2018-07-27 | 2018-12-14 | 北京理工大学 | impact loading experiment device |
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| CN109975358A (en) * | 2019-04-26 | 2019-07-05 | 中国矿业大学(北京) | A kind of experimental system and method for half open space gases explosion |
| CN110824098A (en) * | 2019-10-16 | 2020-02-21 | 北京科技大学 | Pipeline system for directly observing influence of nano particles on detonation limit |
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2020
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Patent Citations (10)
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| CN102688573A (en) * | 2011-03-23 | 2012-09-26 | 王兴章 | Oil gas pipeline flame arrester |
| CN103487337A (en) * | 2013-09-02 | 2014-01-01 | 西安近代化学研究所 | Composite loading test device for explosive blasting impact and shearing |
| US9714817B1 (en) * | 2015-03-06 | 2017-07-25 | The United States Of America As Represented By The Secretary Of The Navy | Central initiating charge |
| CN107796645A (en) * | 2017-10-20 | 2018-03-13 | 安徽理工大学 | A kind of method of testing of cavity body structure to Gas Detonation wave absorption effect |
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