CN205538785U - Explosion radial motion speed testing arrangement in rock - Google Patents
Explosion radial motion speed testing arrangement in rock Download PDFInfo
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- CN205538785U CN205538785U CN201620266624.2U CN201620266624U CN205538785U CN 205538785 U CN205538785 U CN 205538785U CN 201620266624 U CN201620266624 U CN 201620266624U CN 205538785 U CN205538785 U CN 205538785U
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Abstract
The utility model discloses an explosion radial motion speed testing arrangement in rock belongs to deep engineering testing technology field. The device mainly includes: safety container, straight solenoid, the electromagnetic induction ring sum electromotive force measuring device that tests the speed. Electromagnetic induction tested the speed the ring and outwards expands along with the rock medium when this device utilized the explosion, the magnetic line of force in the straight solenoid of cutting, and the electromotive force of inducting when the circular cutting cuts magnetic line of force motion is directly proportional because rock medium radial expansion speed and electromagnetic induction test the speed, therefore can test the speed the induced electromotive force of ring and obtain rock medium radial velocity signal through measuring electromagnetic induction. The difficult problem that prior art can't the accuracy obtains the speed of explosion radial motion in the rock has been solved to this device. Has the construction value to explosion motion parameter in reveing the rock.
Description
Technical field
This utility model relates to a kind of speed measuring device of deep engineering technical field, particularly relates to a kind of be applicable to the assay device measuring radial motion speed of exploding rock.
Background technology
In recent years, along with the fast development of the development of the national economy, the mankind are while aerial development, and deep is the most constantly moved towards in the exploitation of the underground space.The degree of depth of the engineerings such as pit mining, hydroelectric project seepage tunnel, vcehicular tunnel and nuclear waste disposal has reached km, the most thousands of rice.War, the attack of terrorism and occasionality blast happen occasionally, and the damage effect to above-mentioned engineering that explodes in rock is very important.This just requires that the stress causing detonation, deformation and other kinematic parameter and damage effect are made and being assessed more accurately.
Owing to deep engineering is significantly different with the environment residing for superficial part engineering, basic mechanical characteristic and engineering response thereof that engineering rock mass is shown are the most significantly different.Thereby result in the aspects such as engineering project disaster Disaster mechanism, engineering stability control and design theory thereof and also have significant difference, cause many diverse with superficial part engineering, need the deep engineering technical problem of solution badly, and these problems cannot all satisfactorily be explained with traditional theory of continuous medium mechanics.Owing to field monitoring exists many insoluble technical problems, funding problems and safety problem, must utilize existing experimental condition that the dynamic behavior of blast in rock launches in laboratory research, especially explode in rock near region and the experimental study of the middle remote-field media characteristics of motion.Therefore, design in a set of special assay device announcement rock the kinematic parameter that explodes and there is important theory significance and construction value.
At present, if it is desired to record the parameter of motion of exploding in rock, be typically only capable to the mode that taking, foil gauge is set in rock sample, corresponding parameter is obtained by measuring the deformation of foil gauge.But foil gauge is easy in blast process damage, thus affects measurement.And, the sensitivity of this metering system is the highest, it is impossible to obtain the parameter moved of exploding in accurate rock, the speed of radial motion in more cannot being exploded.
Utility model content
This utility model provides the radial motion speed testing device that explodes in a kind of rock.The problem solving the speed that cannot accurately record the radial motion that rock produces due to deformation in blast process in prior art.Further, by arranging safety container and selecting enamel covered wire fw frp cylinder to make straight solenoid, the deficiency that blast radial motion speed testing device can not reuse is solved.
This utility model adopts the following technical scheme that
Explode in a kind of rock radial motion speed testing device, including rock sample, explosive load, explosive load is arranged in the cross section of rock sample, it is characterised in that be cased with straight solenoid outside rock sample, is additionally provided with electromagnetic induction and tests the speed ring in the cross section of rock sample.
The electromagnetic induction that this utility model embeds in rock sample tests the speed ring, and at the outer sheathed straight solenoid of rock sample, produces metastable electromagnetic field in straight solenoid.In blast process, the electromagnetic induction of the embedding ring that tests the speed is expanded outward along with the blastic deformation of rock sample, produces the radial motion of cutting magnetic induction line, and radial motion speed is identical with the speed of rock sample outward expansion.Due to the magnetic induction of copper cash, single electromagnetic induction test the speed the girth of ring and the solenoidal number of turn the most fixing, thus, often the circle electromagnetic induction induced electromotive force produced by ring that tests the speed is directly proportional to the speed of rock sample radial motion.Measure the test the speed induced electromotive force of ring of electromagnetic induction and i.e. can get rock sample speed of radial motion in blast process.The test the speed electromotive force of ring of electromagnetic induction can be recorded by existing electro-motive force measurement device easily, thus this utility model can be exploded easily in the exact value of radial motion speed of rock.
Explode in rock as above radial motion speed testing device, it is characterised in that the described electromagnetic induction ring that tests the speed is made up of enamel covered wire, epoxy resin be fixed in rock sample, concentric with the cross section of rock sample.Electromagnetic induction test wrapper can be concentrically disposed with several groups.When explosive load is relatively big, need suitably to reduce electromagnetic induction when rock medium speed of radial motion in blast process is bigger and test the speed the spacing between ring, to obtain more accurate velocity amplitude；And when the speed of radial motion is less in blast process for rock medium, can suitably increase the spacing that electromagnetic induction tests the speed between ring, without the precision of impact test.
The explosive load of this device is arranged on electromagnetic induction and tests the speed the home position of ring, and primacord is drawn at the explosive load in rock sample.
In rock described in this device, the straight solenoid of blast radial motion speed testing device is the glass fibre reinforced plastic cylinder that outside is wound with enamel covered wire.After the magnetic induction in straight solenoid is stable, the electro-motive force measurement device being arranged on outside this device starts to measure electromagnetic induction while explosive load triggers and tests the speed the electromotive force of ring.
Explode in rock as above radial motion speed testing device, it is characterised in that described straight solenoid is externally provided with safety container, and safety container is made up of cylindrical steel cylinder, is divided into upper and lower, and the upper and lower of safety container is connected by ring flange.The bottom of safety container is provided with optical window.High-speed motion picture camera can be arranged on outside observation port by test, in safety container, taken in the light meeting high-speed motion picture camera photographing request by optical window.Thus can measure rock sample radial motion in blast speed while observation fire process intuitively.
During test, when the magnetic induction in straight solenoid is stable, enters " platform " section, priming device by primacord ignite explosive load and simultaneously triggering electro-motive force measurement measurement device electromagnetic induction test the speed the electromotive force of ring.Owing to the electromagnetic induction ring that tests the speed is combined closely with rock sample by epoxy resin or other modes, the electromagnetic induction deformation of ring of testing the speed is coordinated mutually with the deformation of rock sample.Under Blast Loads, rock sample will appear from by the radial motion of the outside rapid expanding of quick-fried load, and the most pre-buried electromagnetic induction tests the speed ring the most outwards Rapid Expansion the perpendicular cuts magnetic line of force.According to faraday electromagnetic induction principle, the magnetic induction of straight solenoid, single electromagnetic induction test the speed the girth of ring and the solenoidal number of turn is all fixing, and the electromotive force that ring is inducted thus each electromagnetic induction tests the speed is proportional with rock speed of radial motion in blast.Therefore, the test the speed electromotive force of ring of the electromagnetic induction recorded by electro-motive force measurement device just can obtain the speed that rock sample medium is radially movable in blast.Change the size of explosive equivalent, can change and be applied to the size of explosive load on model, it is possible to relatively accurately obtain the kinematic parameter of rock medium under different charging condition.
Owing to using enamel covered wire fw frp cylinder to make straight solenoid, steel cylinder make safety container and connected by ring flange.The strength and stiffness of whole device are enough to ensure that in blast process the deformation of device is the least so that this device is more more reliable than the mode of existing foil gauge, are hardly damaged, and can reuse.And the carg that safety container can ensure that explosion time will not splash, and protects the safety of personnel and equipment.
Compared with prior art, this utility model has the advantage that
This utility model by design a set of test device based on faraday electromagnetic induction principle, when straight solenoid intrinsic inductance stablize, measure due to rock blast deformation and make electromagnetic induction test the speed the ring perpendicular cuts magnetic line of force generation electromotive force.Due to electromagnetic induction test the speed ring produce electromotive force be directly proportional to the speed of rock medium radial motion, thus, this device tests the speed at measurement electromagnetic induction can accurately obtain the radial motion speed of rock medium under explosion condition after ring produces electromotive force, provide powerful for further experimental study.And traditional foil gauge can only react the radial motion situation of rock medium roughly, it is impossible to draw the speed of radial motion exactly.Being additionally, since straight solenoid and have employed the sufficiently high fiberglass of intensity, the deformation in blast process of this device is the least, the phenomenon damaged will not occurs, both can ensure that the precision of test, and can reuse again in experimentation.
Additionally, due to safety container top is provided with observation port, bottom is provided with optical window, can be arranged on outside observation port by high-speed motion picture camera in test, is taken in the light meeting high-speed motion picture camera photographing request in safety container by optical window.Thus can measure rock sample radial motion in blast speed while observation fire process intuitively.
This device keeps the magnetic field in straight solenoid constant in whole process of the test, it is only necessary to ensure that in blast process electro-motive force measurement device can be measured electromagnetic induction and test the speed the speed of electromotive force the most available rock medium radial motion that ring produces.Test device is easy and simple to handle, safety, and meets measuring accuracy requirement.
Accompanying drawing explanation
Fig. 1 is test device schematic diagram of the present utility model.
Fig. 2 is safety container of the present utility model.
Fig. 3 is straight solenoid of the present utility model.
Fig. 4 is that electromagnetic induction of the present utility model tests the speed ring.
Detailed description of the invention
Explode in a kind of rock radial motion speed testing device, including rock sample 5, explosive load 4, explosive load 4 is arranged in the cross section of rock sample, it is characterised in that be cased with straight solenoid 2 outside rock sample 5, is additionally provided with electromagnetic induction and tests the speed ring 3 in the cross section of rock sample.
Explode in rock as above radial motion speed testing device, and wherein the electromagnetic induction ring that tests the speed is made up of enamel covered wire, epoxy resin be fixed in rock sample, concentric with the cross section of rock sample.Can also be concentrically disposed with two or more electromagnetic induction in the cross section of rock sample to test the speed ring, the electromagnetic induction spacing between ring that tests the speed is 5 ~ 10mm.
Explode in rock as above radial motion speed testing device, and wherein explosive load is arranged on electromagnetic induction and tests the speed the home position of ring, is additionally provided with primacord at explosive load, and primacord is drawn at the explosive load in rock sample.
Explode in rock as above radial motion speed testing device, and wherein straight solenoid is the glass fibre reinforced plastic cylinder 9 that outside is wound with enamel covered wire.
Explode in rock as above radial motion speed testing device, and wherein straight solenoid is externally provided with safety container 1, and safety container is made up of cylindrical steel cylinder, is divided into upper and lower, and the upper and lower of safety container connects 6 by ring flange.The top of safety container is also provided with observation port 8, and now the bottom of safety container needs to be provided with optical window 7.
1, the mentality of designing of device is tested
The radial motion speed of rock medium in blast can be recorded owing to there is no the test device of maturation at present, the utility model proposes a kind of device speed with radial motion of exploding in test rock.
This device includes rock sample, explosive load, and explosive load is arranged in the cross section of rock sample, is cased with straight solenoid outside rock sample, is additionally provided with electromagnetic induction and tests the speed ring in the cross section of rock sample.
Test utilizes faraday electromagnetic induction principle, first according to safety container size design cylindrical rock sample.Before test, first cylinder rock sample is cut into two halves, according to explosive equivalent magnitude estimation medium motion speed, wherein half test specimen offer hemispherical charge space, this hemispherical charge space is filled explosive, constitutes a part of explosive load.Meanwhile, in this cross section, radially even offer toroidal cavity, test the speed ring 3 for pre-buried electromagnetic induction.The test the speed groove of ring and sample rock sample of electromagnetic induction is combined closely, and compatibility of deformation, so that it is guaranteed that electromagnetic induction tests the speed, ring rate of expansion in blast process is consistent with the radial motion speed of rock medium.Device is made rock sample blastic deformation, explosive load dimidiation by explosive load, and half has been arranged on the cross section of half test specimen just.So that offer hemispherical charge space on the cross section of second half test specimen, to lay second half spherical explosive.Above-mentioned two halves cylinder specimen is bonded again.Again the rock sample bonded is placed in straight solenoid, sets the electro-motive force measurement device outside straight solenoid, complete the preparation work of assay device.
After test device installs, the pulse power discharges, and produces pulsed magnetic field in straight solenoid.Through appropriate time delay (typically requiring 120 μ s), after pulsed magnetic field enters magnetic induction metastable " platform " section, send time break and ignite explosive load, and trigger electro-motive force measurement device simultaneously.Electro-motive force measurement measurement device electromagnetic induction tests the speed electromotive force produced by ring cutting magnetic line.Under the effect of explosive load blast, rock medium 5 will appear from being gone out the radial motion of outside rapid expanding by explosive load, and the most pre-buried particle speed meter is also with rock medium outwards Rapid Expansion the perpendicular cuts magnetic line of force.According to faraday electromagnetic induction principle, due to the magnetic induction of copper cash, single electromagnetic induction test the speed the girth of ring and the solenoidal number of turn the most fixing, the most often the circle electromagnetic induction induced electromotive force produced by ring that tests the speed is directly proportional to the speed of rock sample radial motion, thus records the test the speed induced electromotive force of ring of electromagnetic induction and i.e. can get rock sample speed of radial motion in blast process.
Change the size of explosive equivalent, can change and be applied to the size of explosive load on model.The different explosive equivalent of experiment can relatively accurately obtain the kinematic parameter of rock medium under different charging condition.
2, concrete structure and the feature of device are tested
Further, so that this device can also be able to be reused after blast, it is additionally arranged safety container and protects.Simultaneously so that explosive load is more easy to be detonated, it is additionally arranged primacord.So that the radial velocity recorded is more accurate, it is additionally arranged multiple tracks electromagnetic induction and tests the speed ring.Device includes that rock sample 5, safety container 1, explosive load 4, electromagnetic induction test the speed ring 3, straight solenoid 2 and electro-motive force measurement device.Straight solenoid 2 it is provided with in safety container 1, straight solenoid 2 is the outside glass fibre reinforced plastic cylinder 9 being wound with enamel covered wire, it is discharged by straight solenoid by the pulse power, magnetic field is produced inside straight solenoid, rock sample 5 it is cased with in straight solenoid, being provided with electromagnetic induction in the cross section of rock sample to test the speed ring 3 and explosive load 4, wherein the electromagnetic induction ring that tests the speed is concentric with the cross section of rock sample, and safety container is externally provided with electro-motive force measurement device.
Experiment is first according to safety container size design cylindrical rock sample, cylinder rock sample is cut into two halves, according to explosive equivalent magnitude estimation medium motion speed, wherein half test specimen offer hemispherical charge space, in this hemispherical charge space, fill explosive, constitute a part of explosive load.Meanwhile, in this cross section, radially even offering some toroidal cavities, the spacing between groove is 5 ~ 10mm, tests the speed ring 3 for pre-buried electromagnetic induction.The electromagnetic induction ring that tests the speed is made up of enamel covered wire.When explosive load is relatively big, when i.e. explosive equivalent is bigger, needs suitably to reduce electromagnetic induction when rock medium speed of radial motion in blast process is bigger and test the speed the spacing between ring, to obtain more accurate velocity amplitude.The epoxy resin ring that tested the speed by electromagnetic induction is utilized to fix with rock sample.The test the speed groove of ring and sample rock sample of electromagnetic induction is combined closely, and compatibility of deformation, so that it is guaranteed that electromagnetic induction tests the speed, ring rate of expansion in blast process is consistent with the radial motion speed of rock medium.Device is made rock sample blastic deformation, explosive load dimidiation by explosive load, is ignited by primacord.Half explosive load has been arranged on the cross section of half test specimen just, so that offer hemispherical charge space on the cross section of second half test specimen to lay second half spherical explosive, offers the passage installing primacord simultaneously.Finally above-mentioned two halves cylinder specimen is bonded again, and the rock sample again bonded is placed in straight solenoid, and straight solenoid is positioned in safety container, fix the ring flange of safety container, set the electro-motive force measurement device outside straight solenoid, complete the preparation work of assay device.
(a) safety container (Fig. 2)
Being made up of cylindrical steel case, point upper and lower two parts, top is provided with observation port, and bottom is provided with optical window, is connected by upper and lower two parts by ring flange.Safety container is internal diameter 400mm, the cylindrical steel case of long 800mm.The observation port on top and a diameter of 100mm of the optical window of bottom, can meet the demand of high-speed photography.This safety container can accommodate the full-size of sample: diameter 300mm, long 600mm.Safety container plays and prevents bomb fragments from outwards splashing, and reaches the purpose of protection equipment safety.High-speed motion picture camera can be arranged on outside observation port by test, in safety container, taken in the light meeting high-speed motion picture camera photographing request by optical window.Thus can measure rock sample radial motion in blast speed while observation fire process intuitively.
Device deformation in blast process is the least, the phenomenon damaged will not occurs, both can ensure that the precision of test, and can reuse again in experimentation.
(b) straight solenoid (Fig. 3)
Straight solenoid is the outside glass fibre reinforced plastic cylinder being wound around enamel covered wire, can adjust the number of turn according to test demand.Copper wire selects line footpath 3mm, heatproof 180 DEG C, the enamel-covered wire of pressure 5000V, and glass fibre reinforced plastic cylinder internal diameter is not less than 400mm, and the straight solenoid number of turn is 360, internal resistance about 0.58 Ω, inductance about 3.98mH, discharged to it by the pulse power, inside straight solenoid, produce magnetic field, in straight solenoid, be cased with rock sample 5.The intensity of glass fibre reinforced plastic cylinder equally protection device is not damaged in blast.
The pulse power discharges, and produces pulsed magnetic field in straight solenoid.Through appropriate time delay (typically requiring 120 μ s), after pulsed magnetic field enters magnetic induction metastable " platform " section, send time break and ignite explosive load by primacord, and trigger electro-motive force measurement device simultaneously.Electro-motive force measurement measurement device electromagnetic induction tests the speed electromotive force produced by ring cutting magnetic line.Under the effect of explosive load blast, rock medium 5 will appear from being gone out the radial motion of outside rapid expanding by explosive load, and the most pre-buried particle speed meter is also with rock medium outwards Rapid Expansion the perpendicular cuts magnetic line of force.According to faraday electromagnetic induction principle, owing to the test the speed number of turn of the girth of ring and straight solenoid of the magnetic induction of copper cash, single electromagnetic induction is the most fixing, the most often the circle electromagnetic induction induced electromotive force produced by ring that tests the speed is directly proportional to the speed of rock sample radial motion, thus records the test the speed induced electromotive force of ring of electromagnetic induction and i.e. can get rock sample speed of radial motion in blast process.
C () electromagnetic induction tests the speed ring (Fig. 4)
It is made up of 0.22mm enamel covered wire, in annular, is fixed in rock sample in reserved toroidal cavity by epoxy resin, combines closely therewith.Under detonation, the test the speed rate of expansion of ring of electromagnetic induction is consistent with rock sample radial motion speed.Electromagnetic induction tests the speed the response time about 0.3 μ s of ring, meets the tachometric survey demand of minimum 0.4m/s.
When explosive load is relatively big, rock medium is time in blast process, the speed of radial motion is bigger, needs suitably to reduce electromagnetic induction and tests the speed the spacing between ring, to obtain more accurate velocity amplitude；And when the speed of radial motion is less in blast process for rock medium, can suitably increase the spacing that electromagnetic induction tests the speed between ring, without the precision of impact test.
3, the feature of device
(a) this device, when straight solenoid intrinsic inductance is stablized, measure due to rock blast deformation and make electromagnetic induction test the speed the ring perpendicular cuts magnetic line of force produce electromotive force.Due to electromagnetic induction test the speed ring produce electromotive force be directly proportional to the speed of rock medium radial motion, thus, this device tests the speed at measurement electromagnetic induction can accurately obtain the radial motion speed of rock medium under explosion condition after ring produces electromotive force, precision is higher and the number of degrees are directly perceived.
B () this device keeps the magnetic field in straight solenoid constant in whole process of the test, it is only necessary to ensure that in blast process electro-motive force measurement device can be measured electromagnetic induction and test the speed the speed of electromotive force the most available rock medium radial motion that ring produces.Test device convenient and flexible operation, uses conveniently, safely, and meets measuring accuracy requirement.
C the straight solenoid of () this device can form constant electromagnetic field, it is ensured that the test the speed rate of expansion of ring of electromagnetic induction is consistent with rock medium radial motion speed.
D () this apparatus structure is simple, integral rigidity is good.Being additionally, since and have employed the sufficiently high fiberglass of intensity, this apparatus structure bulk strength and rigidity safety, the deformation in blast process is the least, will not occur the phenomenon damaged in experimentation.Both can ensure that the precision of test, can reuse again.
E (), additionally, due to safety container top is provided with observation port, bottom is provided with optical window, can be arranged on outside observation port by high-speed motion picture camera in test, is taken in the light meeting high-speed motion picture camera photographing request in safety container by optical window.Thus can measure rock sample radial motion in blast speed while observation fire process intuitively.
Claims (7)
1. explode in a rock radial motion speed testing device, including rock sample (5), explosive load (4), explosive load (4) is arranged in the cross section of rock sample, it is characterized in that being cased with outside rock sample (5) straight solenoid (2), be additionally provided with electromagnetic induction in the cross section of rock sample and test the speed ring (3).
2. explode in rock as claimed in claim 1 radial motion speed testing device, it is characterised in that the described electromagnetic induction ring that tests the speed is made up of enamel covered wire, epoxy resin be fixed in rock sample, concentric with the cross section of rock sample.
3. explode in rock as claimed in claim 2 radial motion speed testing device, it is characterised in that has been concentrically disposed with two or more electromagnetic induction in the cross section of described rock sample and has tested the speed ring, and the electromagnetic induction spacing between ring that tests the speed is 5 ~ 10mm.
4. explode in rock as claimed in claim 1 radial motion speed testing device, it is characterized in that, described explosive load is arranged on electromagnetic induction and tests the speed the home position of ring, is additionally provided with primacord at explosive load, and primacord is drawn at the explosive load in rock sample.
5. explode in rock as claimed in claim 1 radial motion speed testing device, it is characterised in that described straight solenoid is the glass fibre reinforced plastic cylinder (9) that outside is wound with enamel covered wire.
6. explode in rock as claimed in claim 1 radial motion speed testing device, it is characterized in that, described straight solenoid is externally provided with safety container (1), and safety container is made up of cylindrical steel cylinder, being divided into upper and lower, the upper and lower of safety container connects (6) by ring flange.
7. explode in rock as claimed in claim 6 radial motion speed testing device, it is characterised in that the top of described safety container is provided with observation port (8), and the bottom of safety container is provided with optical window (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620266624.2U CN205538785U (en) | 2016-04-01 | 2016-04-01 | Explosion radial motion speed testing arrangement in rock |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620266624.2U CN205538785U (en) | 2016-04-01 | 2016-04-01 | Explosion radial motion speed testing arrangement in rock |
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| CN205538785U true CN205538785U (en) | 2016-08-31 |
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| CN201620266624.2U Expired - Fee Related CN205538785U (en) | 2016-04-01 | 2016-04-01 | Explosion radial motion speed testing arrangement in rock |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501102A (en) * | 2016-10-14 | 2017-03-15 | 安徽理工大学 | A kind of coal petrography blast impulse damage measure method and device |
| CN111665123A (en) * | 2020-06-16 | 2020-09-15 | 中国人民解放军陆军工程大学 | Deep underground explosion effect simulation test device and test technology |
| CN112113698A (en) * | 2020-09-21 | 2020-12-22 | 哈尔滨工程大学 | Underwater explosion measurement system based on electro-magnetic equivalent load measurement method |
-
2016
- 2016-04-01 CN CN201620266624.2U patent/CN205538785U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501102A (en) * | 2016-10-14 | 2017-03-15 | 安徽理工大学 | A kind of coal petrography blast impulse damage measure method and device |
| CN111665123A (en) * | 2020-06-16 | 2020-09-15 | 中国人民解放军陆军工程大学 | Deep underground explosion effect simulation test device and test technology |
| CN111665123B (en) * | 2020-06-16 | 2022-05-10 | 中国人民解放军陆军工程大学 | Deep underground explosion effect simulation test device and test method |
| CN112113698A (en) * | 2020-09-21 | 2020-12-22 | 哈尔滨工程大学 | Underwater explosion measurement system based on electro-magnetic equivalent load measurement method |
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Granted publication date: 20160831 Termination date: 20180401 |