CN108225141A - Deep water pressure explosion resistant device for centrifugal machine underwater explosion test - Google Patents
Deep water pressure explosion resistant device for centrifugal machine underwater explosion test Download PDFInfo
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- CN108225141A CN108225141A CN201711473155.7A CN201711473155A CN108225141A CN 108225141 A CN108225141 A CN 108225141A CN 201711473155 A CN201711473155 A CN 201711473155A CN 108225141 A CN108225141 A CN 108225141A
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- 238000004880 explosion Methods 0.000 title claims abstract description 57
- 238000012360 testing method Methods 0.000 title claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 239000002360 explosive Substances 0.000 claims abstract description 43
- 238000005474 detonation Methods 0.000 claims abstract description 24
- 238000005422 blasting Methods 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 20
- 238000007906 compression Methods 0.000 claims description 14
- 230000000977 initiatory effect Effects 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 13
- 210000002445 nipple Anatomy 0.000 claims description 12
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 6
- 239000013013 elastic material Substances 0.000 claims description 4
- 239000003351 stiffener Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000000843 powder Substances 0.000 description 12
- 230000035939 shock Effects 0.000 description 12
- 238000002474 experimental method Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 7
- 230000010349 pulsation Effects 0.000 description 7
- 239000003999 initiator Substances 0.000 description 6
- XTFIVUDBNACUBN-UHFFFAOYSA-N 1,3,5-trinitro-1,3,5-triazinane Chemical group [O-][N+](=O)N1CN([N+]([O-])=O)CN([N+]([O-])=O)C1 XTFIVUDBNACUBN-UHFFFAOYSA-N 0.000 description 5
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- 239000002390 adhesive tape Substances 0.000 description 2
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- 239000004020 conductor Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
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- 239000003643 water by type Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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- 238000010998 test method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A deepwater pressure explosion resistant device for an underwater explosion test of a centrifugal machine comprises an electric detonator, a detonating connecting piece, a detonating cord and explosive, wherein the electric detonator and the detonating cord are fixedly connected through the detonating connecting piece; the detonating connecting piece comprises a detonating cord joint, a detonator sleeve and a threaded sleeve; the front end of the detonating cord joint is provided with external threads, the center of the detonating cord joint is provided with a through hole, and the detonating cord is arranged in the central through hole of the detonating cord joint; the detonator sleeve comprises a front end with a large diameter and a tail end with a small diameter; the middle part of the front end of the detonator sleeve is provided with a cavity for accommodating a detonator, and the tail end of the detonator sleeve is provided with a central through hole for connecting a detonator detonating cord in a penetrating way; the screw sleeve penetrates through the tail end of the detonator sleeve and is matched and connected with the external thread at the front end of the detonating cord connector through the internal thread, and the detonator is pressed and attached to the end face of the detonating cord. The invention separates the detonator and the detonating fuse from water and tightly attaches the detonator and the detonating fuse, thereby overcoming the problem of explosion rejection and ensuring the reliability of the detonation of the high static pressure underwater blasting detonator.
Description
Technical field
The invention belongs to explosive container design fields, are related to a kind of resistance to deep-water pressure for centrifuge Underwater Explosion test
Destructor.
Background technology
Wartime large size dam causes multiple hydraulic engineerings to occur even to burst once by explosive damage, will cause huge
Personal damage and economic loss.Therefore, study the antiknock safety problem of dam engineering to reduce to greatest extent loss and into
The assessment of row safety of dam has highly important theory directive significance.Since funds and place are limited, it is difficult to quick-fried by prototype
Fried experimental study obtains the mechanism that large-scale dam body is injured under Blast Loads；Traditional structural model test is also difficult to really take off
Show the mechanical behavior and destructive process of explosion prototype.Geotechnical centrifuge increases model gravity by high speed rotation, makes model media
Body generation and weight stress similar in prototype, the deformation of model and failure mechanism are similar to prototype, so as to simulate complicated rock
Geotechnological journey and dynamics problem, become one of conventional means of research explosion engineering mechanics at present, but its expensive cost and
Testing expenses become its limitation promoted the use of a large area.
In addition in centrifugal model Underwater Explosion test is carried out, destructor is in underwater overweight environment, overweight ring
Border and the external condition of high hydrostatic pressure can influence the explosion property of the destructors such as detonator or even phenomenon of miss-firing occurs, and be badly in need of
Safe and reliable, equivalent with centrifuge modelling test height destructor, and the failure mechanism of research facilities engineering are developed, to substitute
Centrifuge realizes the accurate simulation of underwater demolition under high hydrostatic pressure force environment.
Invention content
The invention discloses a kind of destructors of resistance to deep-water pressure for centrifuge Underwater Explosion test, overcome Gao Jing
Press the problem of miss-firing of underwater detonator, it is ensured that the reliability of blasting cap initiation in high static pressure underwater demolition experiment.
The specific technical solution of the present invention is as follows：
A kind of destructor of resistance to deep-water pressure for centrifuge Underwater Explosion test, including electric cap, detonation connector,
Primacord and explosive are connected firmly between the electric cap and primacord by the connector that detonates；
The detonation connector includes primacord connector, detonator set and swivel nut；The front end of primacord connector is provided with outer
Screw thread, is provided centrally with through-hole, and primacord is arranged in the central through hole of primacord connector；Detonator covers the front end for including major diameter
With the tail end of minor diameter；The front center of detonator set is provided with the cavity for accommodating detonator, and the tail end of detonator set is provided with center and leads to
Hole connects blasting cap initiation line for wearing；Swivel nut passes through the tail end of detonator set, passes through internal thread and the external screw thread of primacord connector front end
Cooperation connection, detonator is overlayed on the end face of primacord.
Further, the destructor and sensor are connected firmly by seal nipple sealing on the upper cover plate of container；
The container lower half fills water, and top half is filled with high pressure gas；Explosion component and sensor are each passed through on upper cover plate
Central through hole and sensor through-hole after be arranged in container chamber.
Further, the seal nipple is made of compression joint, sealing element and sealed base；The compression joint
It is provided with external screw thread；The sealing element is made of compressible elastic material；Sealed base has internal thread and external screw thread,
Internal thread couples with the external screw thread cooperation of compression joint, and external screw thread couples with pressurized tank upper cover plate；P-wire or detonating cord pass through
The central through hole of compression joint and sealing element.
Further, it is provided with pressure gauge outside the upper cover plate.
Further, the pedestal of container is provided with right-angled intersection stiffener plate.
Further, the sensor is pressure sensor.
Further, sensor is laid in same level height with explosive.
The advantageous effects that the present invention has are as follows：
1st, traditional electric detonator initiation mode is tried under water in a manner that detonator and primacord winding are bonded by adhesive tape
The phenomenon that being proved to normally be detonated, often miss-fired in testing；The present invention uses detonation connector by detonator
It pushes and pastes with primacord end face seal condition, be allowed to and water segregation and fit closely fixation, reduce water logging and hydraulic pressure and detonator is risen
The influence of quick-fried performance, overcomes the problem of miss-firing, it is ensured that the reliability of high static pressure underwater demolition blasting cap initiation.
2nd, the present invention carries out the essence of underwater demolition under high hydrostatic pressure force environment using pressure explosive container instead of centrifuge
True simulation test can examine destructor in height by the underwater test of the careful design accurate simulation centrifuge of pressure parameter
Explosion property under hydraulic pressure environment and detonation reliability, real simulation centrifuge Underwater Explosion test, and with facilitating stabilization
Reliably, the characteristics of at low cost.
3rd, the present invention adds in enough water and is passed through the air of different air pressures in a sealed container, realizes different hydrostatic pressures
The blast analogue of parameter, and pressure sensor is set in a reservoir, the influence of underwater blast wave and gas bubble pulsation is measured, is ground
Study carefully explosion property, test to the reliability of explosive charge.
4th, the present invention steeps pulsation period data and empirical equation comparing, and right using the impact crest value surveyed is gentle
Least square fitting result is handled, and has obtained powder charge equivalent coefficient and equivalent dose, realize to explosive initiation state and
Detonation reliability is tested judges, and the peak impact pressure value that obtains according to theory or surveys peak pressure value, is calculated
The parameter of blast pressure container is arrived, the development for explosive container provides foundation.
5th, the present invention is provided with sealing element in the upper cover of explosive container, for by the sealing of p-wire and detonating cord, sealing
Part is made of compressible elastic material, is crimped on p-wire or detonating cord, it is ensured that whole container is air tight.
Description of the drawings
Fig. 1 is explosion sealed container structure schematic diagram
Fig. 2 is p-wire/detonating cord seal joint structure schematic diagram
Fig. 3 is detonation connecting-piece structure schematic diagram
Fig. 4 is destructor structure diagram
Fig. 5 underwater explosion pressure time curves
Fig. 6 shock wave lower wall infinitesimal force analysis
In figure, 1-container；2-detonating cord seal nipple；3-p-wire seal nipple；4-sensor；5-explosive；
6-water；7-air pressure valve；8-upper cover plate；9-pedestal；10-pressure gauge；11-compression joint；12-sealing element；13-sealing
Pedestal；14-seal line；21-electric cap；22-detonator set；23-swivel nut；24-primacord connector；25-primacord；30—
Signal conditioner；31-dynamic acquisition device；32-computer terminal；33-initiator.
Specific embodiment
First, destructor and module related measurement devices
As shown in Figure 1, the Underwater Pressure explosion testing device of the present invention includes explosion sealing container 1, explosion component and biography
Sensor 4, container 1 include upper cover plate 8, pedestal 9 and outer wall 7, and upper cover plate 8 is provided with central through hole, sensor through-hole and air pressure valve,
Explosion component and sensor 4 are arranged on after being each passed through central through hole and sensor through-hole in container chamber；Sensor and powder charge cloth
Same level height, explosion component and sensor 4 is located to connect firmly on the upper cover plate 8 of container 1 by the sealing of seal nipple 2；Hold
Device lower half fills water, and top half is filled with high pressure gas.
Two through-holes that powder charge and sensor are reserved at pressure vessel upper cover plate are arranged into inside container, and through-hole is machined with
Internal thread is respectively drawn detonating cord and p-wire from through-hole by two connectors, then screwing hermetic, pressure vessel upper cover plate
Place's installation digital pressure gauge and air pressure valve, to pressurize and read internal tank gas pressure.Pedestal 9 is provided with right-angled intersection
Stiffener plate, to improve the ability to bear of container explosion.
Circuit seal approach is with reference to the detonating cord 2 of antiknock pressure vessel shown in Fig. 2 and the circuit seal nipple of p-wire
3.Seal nipple includes detonating cord seal nipple 2 and p-wire seal nipple 3, and seal nipple is by compression joint 11, sealing element 12
It is formed with sealed base 13；Compression joint 11 is provided with external screw thread；Sealing element 12 is using compressible elastic material systems such as nylon
Into；Sealed base 13 has internal thread and external screw thread, and internal thread couples with the external screw thread cooperation of compression joint 11, external screw thread and pressure
Power tank upper cover plate 8 couples；Seal line 14 namely p-wire or detonating cord, lead to across the center of compression joint 11 and sealing element 12
Hole.
As shown in figure 3, explosion component is also referred to as destructor, mainly include electric cap 21, detonation connector, primacord 25
And explosive, it is connected firmly between electric cap 21 and primacord 25 by the connector that detonates；The connector that detonates includes primacord connector 24, thunder
Pipe sleeve 22 and swivel nut 23；The front end of primacord connector 24 is provided with external screw thread, is provided centrally with through-hole, and primacord 25, which is arranged on, leads
In the central through hole of quick-fried rope slocket 24；Detonator set 22 includes the front end of major diameter and the tail end of minor diameter；The front end of detonator set 22
Middle part is provided with the cavity for accommodating detonator 21, and the tail end of detonator set 22 is provided with central through hole, blasting cap initiation line is connect for wearing；Spiral shell
Set 23 passes through the tail end of detonator set 22, coordinates connection by the external screw thread of 24 front end of internal thread and primacord connector, by detonator 21
It overlays on the end face of primacord 25.
There are three types of experiment explosion medicaments used：Detonator, cylindricality powder charge, spherical charge.According to previous centrifugal test knot
Fruit, using electric cap 21, primacord 25, spherical charge as Explosive sequence spherical charge destructor, in 30cm depth of water 60G gravity
Under acceleration, i.e. 277kPa hydraulic pressure (being equivalent to the 18m depth of waters), destructor cannot be acted on normally.Its main cause may be to adopt
It is the mode for being bonded detonator and primacord winding with adhesive tape with traditional blasting cap initiation mode, under high hydraulic pressure environment, electric thunder
Water layer between pipe 21 and primacord 25 can play the role of reduction to the initiating ability of electric cap 21, the phenomenon that often miss-firing
Occur.And the connection mode of Fig. 3 is used, using being screwed for special Al-alloy metal connector, ensure detonator and primacord
End face is combined closely, and the built-in cavity for accommodating detonator, is allowed to completely cut off with water and is sealed, and initiating unit is not by the shadow of hydraulic pressure
It rings, that is, the pressure of water can not be transferred to detonator 21 and the end face of primacord 25 and influence its proper detonation, so as to reduce water
And influence of the hydraulic pressure to blasting cap initiation performance, detonator and main charge realize reliable and stable explosion by primacord.
Main charge is divided into spherical or cylindricality by shape.Spherical main charge is to gather black -2 (8701 explosives), and degree of packing is
1.65g/cm3, explosive specification are 0.5g, 0.75g, 1.0g, 2.0g, 3.0g；External 10~32cm primacords 25, primacord 25 are used
Miniature electric cap 21 detonates.Cylindricality main charge is poly- black -14, degree of packing about 1.65g/cm3, direct electric detonator initiation, dose
Specification (meter detonator dose) is 0.125g, 0.250g, 0.500g, 0.750g, 1.000g.Main charge performance parameter, explosion velocity are
8160m/s, quick-fried hot 1210kJ/mol, quick-fried appearance 663L/kg, JWL equation parameters A=6.3, B=0.175, R1=4.45, R2=
1.35, w=0.31, E=0.112.Propagation mode be aluminum hull primacord, housing diameter Φ 2.56mm, shell wall thickness 0.5mm；It leads
Quick-fried rope medicament is blunt black -5, and powder charge line density about 3.15g/m, explosion velocity is about 8041m/s.Detonation mode rises for miniature electric cap
Quick-fried, dose is 45mg explosives inside detonator, and (explosive is hexogen to 45mg primings, and priming is nitrogenized for carboxymethyl cellulose
Lead), equivalent dose 50mg, shell sizes Φ 3.78mm × 7.36mm, conductor length 40mm extend to 1m.Safe current 75mA
± 5mA, ignition DC voltage 12V ± 0.5V (± 2 μ F of 20 μ F of capacitance).
As shown in figure 4, the external connection of explosion sealing container has verifying attachment.Verifying attachment include signal conditioner 30,
Dynamic acquisition device 31, computer terminal 32 and initiator 33, the initiator 33 are electrically connected with the electric cap 21 in explosion component；
4 output terminal of sensor is after signal conditioner 30 is amplified conditioning to 4 signal of sensor, by dynamic acquisition device 31
Signal acquisition is carried out, and the data of acquisition are stored in computer terminal 32.
Initiator 33 includes synchronous triggering port, is connected by synchronous signal line and dynamic acquisition device 31, triggering dynamic
Collector 31 carries out detonator signal acquisition.Initiator 33 uses GBP414 type initiators, has and measures, shows network DC electricity
Resistance and the function of detonation electric cap 21, and without battery powered.The key technical indexes includes, output voltage：≥1600V
(moment after charging)；Initiating ability：When conductor resistance is not more than 50 Ω, the military 8# electric caps 200 of detonation series connection immediately after charging
Hair；Weight：≤1kg；Volume：Length × width × height≤160mm × 105mm × 60mm.
Sensor 4 uses water pressure sensor, the model PCB 138A10 pressure sensings that ICP companies is used to produce
Device, range 68.95MPa, sensitivity coefficient 73mV/MPa, resonant frequency >=1000kHz, low-response frequency 2.5Hz.It should
Pressure signal in water can be converted to electric signal by model pressure sensor, but be needed at the conditioner of model 482C
Reason.There are four autonomous channels for the tool of signal conditioner 30, and suitable current source can be provided for sensor to maintain working sensor,
Outputting and inputting for each channel uses bnc interface in plate below.
Dynamic acquisition device 31 uses high-speed data acquistion system, and Dong Huatai is used to survey the model DH5960's of company
Super dynamic signalling analysis system, has wide range of applications, can complete ess-strain, vibration (acceleration, speed, displacement),
The various physical quantitys such as impact, acoustics, temperature (various types thermocouple, platinum resistance), pressure, flow, power, torque, voltage, electric current
Test and analysis.20MHz High-speed transient sampling rates are widely used in impact, explosion bulge test, accurately capture transient signal.
With 16 autonomous channels, sample frequency is set as 1M during experiment.
Destructor and test sensor are connected and are arranged in pressure vessel with detonating cord and p-wire, and connects and sets
Put data collecting system.Dose is chosen according to testing program, depth and measuring distance are sunk in setting powder charge, then sealing pressing to scheme
During designed pressure, detonate destructor, the water pressure variation that test underwater explosion generates.
2nd, explosive test and theoretical calculation
Explosive test is carried out using above-mentioned destructor, explosive test content is broadly divided into four parts：Detonator performance
Test, the likelihood verification of pressurization model, cylindricality powder charge experiment, spherical charge detonation performance test.Detonation performance test mainly needs
It examines under 30m depth of water environment and (is equivalent in centrifugal model test, 100G centrifugal accelerations, the 30cm depth of waters), i.e., it is big at 4
Under air pressure, whether destructor can reliably detonate completely.
Underwater explosion load includes underwater blast wave and gas bubble pulsation, and Cole has done a large amount of research work for underwater explosion
Make, propose the empirical equation of underwater blast wave calculation of pressure, underwater blast wave and gas bubble pulsation formula can be by following formulas
(1), formula (2) determines：
In formula：W is the charging quality (kg) for being converted to TNT；R is quick-fried away from (m)；H is that depth (m) is sunk in powder charge；H0It is atmospheric pressure
Equivalent water-column (m), the equivalent water-column of standard atmospheric pressure is 10.34m；kp、ApFor with the relevant impact of explosive characteristic
Wave parameter, KTFor with the relevant Bubble Parameters of explosive characteristic, for TNT explosives, kp=52.4, Ap=1.13, KT=2.11.Examination
It is RDX to test destructor main charge ingredient used, and RDX medicaments power in the case of complete detonation is 1.58 times of TNT explosives.
RDX explosive payloads used in experiment are converted into TNT equivalents by convolution (1) and formula (2) according to equivalent coefficient n, using etc.
The purpose of effect coefficient n is the influence for overcoming different explosive types and result of exploding.Each group explosive payload is WiExperimental evidence warp
Testing the shock wave peak pressure that formula is calculated isSee that formula (3), gas bubble pulsation period areSee formula (4)：
The pressure-time curve measured simultaneously using test method by sensor as figure 5 illustrates, in each group operating condition of test,
The explosive payload W of i-th group of experimentiIt is Hi and the equivalent water-column of air pressure is H to sink depth in powder charge0iUnder conditions of, it is measured after explosion
Impact crest value PmiWith bubble pulsation period Ti(difference for being equal to secondary surge pressure moment and shock wave peak pressure moment)
It is arranged, comparative test result is analyzed.
According to least square method principle, equivalent coefficient n is calculated based on formula (3) and (4) fitting test data so that formula
(3) and (4) data point for being calculated and each the obtained quadratic sum r of data point deviation is surveyedpAnd rTIt is minimum value；I.e. really
Determine n values so that rpAnd rTValue for minimum, wherein
Due to rpAnd rTIt is the function about n, seeks r respectivelypAnd rTN during for minimum valuepAnd nTIf
Then see formula (6)：
It can be acquired by formula (5), formula (6)：
npAnd nTShock wave and the equivalent dose of gas bubble pulsation are respectively corresponded to, it should in the case of the complete detonation of explosive
Meet np≈nT, takeTNT equivalent coefficients as powder charge used in experiment.
According to the size of the coefficient value, and field test phenomenon is combined, preliminary judgement can be made：It is as n >=1.00, i.e., quick-fried
The power of explosion unit is equivalent to or the TNT powers more than equivalent, that is, thinks main charge reliable initiation；As n ≈ 1.58, approach
The equivalent coefficient of RDX medicaments shows that main charge reaches the complete detonation of high explosion velocity；Work as n《When 1, i.e., judgement explosion is not reliable rises
It is quick-fried.In addition, it is 50mg to be checked due to the equivalent dose of detonator by test, if during the equivalent dose nW ≈ 50mg of destructor,
It then can determine whether blasting cap detonation, but the main charge that do not detonate；If not measuring any shock wave pressure peak value, i.e. during n=0, then can sentence
Determine detonator not have an effect.
Judge section by standard setting of n=1, interval range takes ± 20%, then can obtain following decision criteria：
Work as n>When 1.20, main charge reaches the complete detonation of high explosion velocity；
As 0.80≤n<When 1.20, main charge is in low blasting speed detonation；
When 0<n<When 0.80, main charge is in half quick-fried or improper detonation state；
As n=0, detonator is not had an effect.
Main charge is under detonation state, i.e. during n >=0.80, which tends towards stability, and can be used to
It is calculated as the equivalent dose coefficients of its TNT.
3rd, explosive container design calculates
According to more than explosive test as a result, the parameter to explosive container is designed, it is as follows that design calculates step：
(1) basic principle and blast impulse parameter determine
According to the characteristics of explosive test, the energy of hydraulic pressure compression deformation consumption is had ignored.This is because water is difficult to compress
Liquid, when ambient pressure increases to 100M Pa, the density of water only increases by 5% or so.Therefore explosive explosion time in water, water
The strain energy of distortion very little itself consumed, the transmission efficiency of explosion energy are high.
Secondly, the characteristics of being tested according to simulated explosion and the processing request of container, it is determined that preliminary parameters below：
Air pressure P is filled in container0For 0.4MPa, underwater explosion dose 3g is born, size Φ 80cm × 100cm, material is preferred
Intensity is more than the steel of Q235.
For concentrating blasting method, the surge pressure theoretical value of underwater shock wave wave surfaceFor formula (9) Suo Shi
In formula:The surge pressure in wave surface, Pa are obtained for theoretical calculation；kpThe constant related with explosive property, it is right
TNT explosives kp=52.4；W is dose, kg；R be distance of the object away from pack center, m；ApFor damped expoential, to TNT explosives, Ap
=1.13.
The functional relation of underwater shock wave pressure P and time t is formula (10)
θ is integral constant in formula,
When to the Parameter design and computations of cavity charge containers, consider that shock wave is reflected in tank skin and be superimposed, tank skin is reached with shock wave
When surge pressure Pm2 times as explosive load, strength check is carried out to the side wall of cavity charge containers and bottom surface respectively.
(2) cavity charge containers sidewall thickness calculates
First according to formula (10) and (11), the surge pressure that water borehole blasting shock wave reaches side wall is calculatedTank
Interior initial pressure is P0, then the pressure loading P that side wall is subject to is formula (12)：
Wherein P0It is stamping press in container, that is, initial pressure in container before explosion.
Tank skin infinitesimal stressing conditions such as Fig. 6, can be balanced equation (13)：
In formula P be side wall suffered by pressure loading, a be cavity charge containers radius, σθFor side wall tensile stress.
It is obtained by formula (13)：
After steel type used in cavity charge containers is determined and cavity charge containers radius a, the most stool of material is it has been determined that only
Cause σθ≤[σs] it can ensure the safety of cavity charge containers, so as to which wall thickness δ be calculated.
(3) cavity charge containers bottom surface strength check
The strength check of cavity charge containers bottom surface is checked mainly for tank bottom shearing strength, meeting for proof strength will
It asks, when calculating the shock loading that tank bottom receives, regards spherical surface shock wave approximation as plane wave, it is believed that shock wave wave crest arrives simultaneously
It up to bottom surface and reflects, the maximum impact pressure load reference formula (12) that bottom surface is subject to.
Equilibrium equation (15) when tank bottom is hit
Pπa2=2 π a δbσg (15)
δ in formulabFor tank bottom wall thickness, σgFor bottom surface tank skin shear stress.
Formula (16) can be obtained by (15) formula：
After steel type used in cavity charge containers is determined, the shearing strength [σ of materialg] just it has been determined that according to cavity charge containers
As long as radius a, so that shear stress σ in materialgLess than the shearing strength [σ of materialg], you can ensure the safety of cavity charge containers, so as to count
Calculation obtains tank bottom wall thickness δb。
It should be noted that Yi Shang Parameters design is the side being combined according to aforementioned theoretical calculation and experimental data
Formula after explosive equivalent coefficient n is calculated, according to formula (9), obtains surge pressure theoretical valueAnd respectively according to formula
(12) the blasting pot parameter being finally calculated after pressure loading P is obtained.
The surge pressure measured value P that can also be obtained in practical applications according to experimentmTo replace theoretical valueTo explosion
The parameter of container is designed calculating.
(4) final blasting pot design parameter
Explode can container overall height 1200mm, internal height 960mm, side thickness 20mm, upper and lower covers plate thickness 35mm, bottom cover plate
Install well word stent additional.Upper cover plate center and the through-hole away from diameter 50mm reserved at the 250mm of center, pass to lay explosive and pressure
Deep 300mm is sunk in sensor, powder charge, depth of water 700mm, and sensor is laid in same level height with powder charge, and distance 300mm can meet
Required explosive type and the requirement of the simulation test of equivalent, and ensure the safety of simulated explosion experiment.
Claims (7)
1. a kind of destructor of resistance to deep-water pressure for centrifuge Underwater Explosion test, it is characterised in that：The explosion dress
It puts including electric cap (21), detonation connector, primacord (25) and explosive, between the electric cap (21) and primacord (25)
By detonating, connector connects firmly；
The detonation connector includes primacord connector (24), detonator set (22) and swivel nut (23)；Primacord connector (24)
Front end is provided with external screw thread, is provided centrally with through-hole, and primacord (25) is arranged in the central through hole of primacord connector (24)；Thunder
The tail end of front end and minor diameter of the pipe sleeve (22) including major diameter；The front center of detonator set (22), which is provided with, accommodates detonator (21)
Cavity, the tail end of detonator set (22) is provided with central through hole, blasting cap initiation line connect for wearing；Swivel nut (23) is across detonator set
(22) tail end by internal thread and the cooperation connection of the external screw thread of primacord connector (24) front end, detonator (21) is overlayed and is being led
On the end face of quick-fried rope (25).
2. the resistance to deep-water pressure destructor according to claim 1 for centrifuge Underwater Explosion test, feature exists
In：The destructor and sensor (4) are connected firmly by seal nipple sealing on the upper cover plate (8) of container (1)；Described
Container (1) lower half fills water, and top half is filled with high pressure gas；Explosion component and sensor (4) are each passed through upper cover plate (8)
On central through hole and sensor through-hole after be arranged in container chamber.
3. the resistance to deep-water pressure destructor according to claim 2 for centrifuge Underwater Explosion test, feature exists
In：The seal nipple is made of compression joint (11), sealing element (12) and sealed base (13)；The compression joint
(11) it is provided with external screw thread；The sealing element (12) is made of compressible elastic material；Sealed base (13) has interior
Screw thread and external screw thread, internal thread couple with the external screw thread cooperation of compression joint (11), and external screw thread joins with pressurized tank upper cover plate (8)
It connects；P-wire or detonating cord pass through the central through hole of compression joint (11) and sealing element (12).
4. the resistance to deep-water pressure destructor according to claim 2 for centrifuge Underwater Explosion test, feature exists
In：Pressure gauge is provided with outside the upper cover plate (8).
5. the resistance to deep-water pressure destructor according to claim 2 for centrifuge Underwater Explosion test, feature exists
In：The pedestal (9) of container is provided with right-angled intersection stiffener plate.
6. the resistance to deep-water pressure destructor according to claim 2 for centrifuge Underwater Explosion test, feature exists
In：The sensor (4) is pressure sensor.
7. the resistance to deep-water pressure destructor according to claim 2 for centrifuge Underwater Explosion test, feature exists
In：Sensor is laid in same level height with explosive.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109596666A (en) * | 2018-12-29 | 2019-04-09 | 北京理工大学 | It is a kind of for simulating the explosion experimental facility of underwater free field environment |
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| CN203744856U (en) * | 2014-03-20 | 2014-07-30 | 武汉科技大学 | Priming network simulating underwater explosion test |
| CN105486184A (en) * | 2015-11-19 | 2016-04-13 | 中国人民解放军理工大学 | Detonating device for centrifugal machine underwater explosion model test |
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2017
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| CN101533001A (en) * | 2009-04-20 | 2009-09-16 | 昆明理工大学 | Device for testing underwater brisance of explosive |
| CN201974537U (en) * | 2011-03-31 | 2011-09-14 | 中国水利水电科学研究院 | High-pressure simulation testing apparatus for geotechnical centrifugal machine |
| CN203744856U (en) * | 2014-03-20 | 2014-07-30 | 武汉科技大学 | Priming network simulating underwater explosion test |
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