CN105300875A - Explosive loading continuous multi-pulse-load loading experiment device - Google Patents
Explosive loading continuous multi-pulse-load loading experiment device Download PDFInfo
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- CN105300875A CN105300875A CN201510697886.4A CN201510697886A CN105300875A CN 105300875 A CN105300875 A CN 105300875A CN 201510697886 A CN201510697886 A CN 201510697886A CN 105300875 A CN105300875 A CN 105300875A
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Abstract
The invention discloses an explosive loading continuous multi-pulse-load loading experiment device which comprises an upper impact column, buffer cushions, a sleeve, a middle impact column, a sample, a lower impact column and a sensor. The upper impact column is a steel solid cylinder provided with two annular supports, and is connected with the large-inner-diameter end of the sleeve. The sleeve is a cylinder with a step through hole machined inside. The small-inner-diameter part of the sleeve is sequentially provided with the buffer cushions, the middle impact column, the sample and the lower impact column. The three buffer cushions are located at the end of the sleeve, the diameter-changing position of the step hole of the sleeve and between the upper impact column and the middle impact column respectively. The middle impact column, the sample and the lower impact column are cylinders and have the outer diameters the same as the inner diameter of the sleeve. The end, away from the upper impact column, of the lower impact column is provided with the steel cylindrical sensor. By means of the explosive loading continuous multi-pulse-load loading experiment device, continuous multi-pulse-load loading can be conducted for explosive loading, all pulse load stress peak values and loading time can be effectively controlled, the service environment where layer targets are built up during explosive loading in the payload can be more vividly simulated, and then the overload resistance safety of the device is evaluated scientifically.
Description
Technical field
The invention belongs to explosive wastewater laboratory experiment device technique field, relate to a kind of multiple-pulse load charger, the continuous multiple-pulse load loading experimental apparatus particularly during a kind of simulant missile penetration stratification target.
Background technology
Along with protection works development, the strategy office that world is important, as command centre, communication center, politics building etc. have the trend of strong protection and MULTILAYER COMPOSITE protection, and all have employed underground or semi-underground type structure.From target property, generally MULTILAYER COMPOSITE safeguard structure can be equivalent to the stratification target be made up of soil layer, cemented rock layer, discrete material layer and reinforced concrete floor.Warhead is in the process of penetration stratification target, and warhead explosive loading will be subject to the effect of continuous print multiple pulses load, thus may cause explosive loading preinitiation, cannot reach the damage effectiveness of expection.Therefore, the overload-resistant security of explosive loading under the effect of continuous multiple-pulse load has become one of Important Problems of weapon development department care.
At present, the research of the overload-resistant security of domestic warhead explosive loading loads mainly for single pulse load, the people such as Shiying WANG are at document " the experimental system for simulating research of premature burst is launched in howitzer explosive loading " (war industry's journal, in November, 2002, 23rd volume the 4th phase 541 pages) in report a kind of single pulse load loading simulation sample bullet, this simulation sample bullet adopts piston cylinder operator, that is: sample is installed in sleeve, powder column two ends piston compresses, one end piston is fixed on large quality anvil body, to guarantee axial displacement not to occur in experimentation, utilize the piston of the large-scale drop impact powder column other end, thus impact compress effect is produced to powder column sample, by being installed on the sensor bottom simulation sample bullet, stress loading course suffered by record explosive sample.But, when simulating the overload-resistant stability of explosive loading when sample bullet is applied to research warhead penetration stratification target, there is following problem:
First, this sample bullet structure only Dynamite powder charge can be subject to the situation of single pulse load, Dynamite powder charge cannot be subject to the situation of continuous multiple-pulse load, not be inconsistent with the force environment of explosive loading during warhead penetration multiple shell target;
Secondly, this sample bullet structure can not embody powder charge damage effect in loading procedure, both cannot evaluate multiple-pulse continuous load and load damage that explosive loading is caused and the damage impact for explosive loading security, and warhead explosive loading is after the first pulse action of experience, powder charge inside often can produce damage in various degree, the powder charge probability that " focus " is emerged in succeeding impulse mechanism with damage increases, and premature burst may occur.
Also there are not various open report, paper and patent etc. that the continuous multiple-pulse of explosive loading therewith load loading experimental apparatus is relevant at present both at home and abroad.
Summary of the invention
In order to overcome shortcomings and deficiencies of the prior art, the invention provides a kind of experimental provision that can carry out continuous multiple-pulse loading to explosive loading, each pulse loading stress peak value and load time all can effectively control, and consider the impact of damage on the overload-resistant stability of explosive loading, Service Environment during warhead explosive loading penetration stratification target can be simulated more really, and then its overload-resistant security of scientific evaluation.
Explosive loading provided by the invention continuous multiple-pulse load loading experimental apparatus, comprises and hits post, cushion pad, sleeve, in hit post, sample, under hit post and sensor.Wherein, on to hit post be steel solid cylinder with two annular brace, and one end larger with sleeve diameter is connected, sleeve is the cylinder that inside is processed with step through-hole, the part that sleeve diameter is less be provided with successively cushion pad, in hit post, sample and under hit post; Three cushion pads lay respectively at sleeve ends, sleeve stepped hole reducing place and upper, in hit between post; In hit post, sample and under hit post and be right cylinder and external diameter is equal with sleeve diameter; Under hit post is provided with steel cylinder shape sensor away from the one end above hitting post, hit post on described, in hit post, sample, under hit post and all coordinate with the internal diameter internal diameter H9/g8 of sleeve.
The ratio hitting the length and its total length that post exceeds sleeve end face part on described is 1:2 ~ 3, on hit the diameter about 1 ~ 1.5cm little of sleeve outer diameter of the larger annular brace of column diameter, little 0.5 ~ the 1cm of diameter of the diameter end larger than sleeve diameter of the annular brace that diameter is less, the thickness sum of the annular brace that the spacing of two annular brace is less with diameter the length of larger than sleeve diameter section should be about 0.5-1cm.The length of one end that described sleeve diameter is large is about 1:3 with the ratio of its total length, and internal diameter is 1:3 ~ 4 compared with the internal diameter of small end and the ratio of external diameter, and the internal diameter of the larger end of internal diameter is about 1:1.5 ~ 2 with the ratio of external diameter.The about 0.5cm of diameter of the internal diameter end larger than sleeve diameter of the cushion pad of sleeve end face, external diameter about 1 ~ 1.5cm less of the external diameter of sleeve.Internal diameter 0.5cm, the diameter little about 1 ~ 1.5cm of external diameter than sleeve diameter larger end more about than the diameter above hitting post cylindrical section of the cushion pad at sleeve stepped hole reducing place; On hit post and in hit the diameter about 1 ~ 1.5cm less of compared with the diameter of small end sleeve diameter of the cushion pad of intercolumniation.
After each parts assembling of explosive loading continuous multiple-pulse load loading experimental apparatus, be placed on fixing platform, utilize to adopt in the object strikes of rapid movement and hit post, by above hit post to upper, in hit cushion pad between post and sample applies axial compressive stress, this cushion pad is compacted, first pressure pulse is produced to sample, Qinzhou harbor can be simulated and invade ground floor soil layer; When upper, in after the cushion pad hit between post is compacted, on hit the less annular brace of diameter in post just in time with the cushion contact at sleeve stepped hole reducing place, under the effect of this annular brace, the cushion pad at sleeve stepped hole reducing place is compressed, second pressure pulse is formed to sample, Qinzhou harbor thickness of being unearthed can be simulated and enter cemented rock layer; After the cushion pad at sleeve stepped hole reducing place is compacted, under the effect of axial force, above hit post and continue to move downward, stress concentration point can be formed at annular groove place, thus cut off the less annular brace of diameter; After the cushion pad at sleeve stepped hole reducing place is compacted, the larger annular brace of diameter just in time with the cushion contact of sleeve ends, now because the intensity of the cushion pad at sleeve stepped hole reducing place is higher than the cushion pad of sleeve ends, therefore the process of sleeve ends cushion pad compacting, be actually the process of second pressure pulse unloading, after Qinzhou harbor pulp building block rock layers can be simulated, enter discrete material layer; In like manner, after sleeve ends cushion pad is compacted, under the effect of axial force, on hit post and continue to move downward, can form stress concentration point at annular groove place, thus cut off the larger annular brace of diameter, now axial stress will directly act on sample, produce a larger pressure pulse, can simulate after penetration ejects discrete material layer and enter reinforced concrete floor.The peak stress of pressure pulse and action time can be regulated by cushion pad unit thickness and material, and pass through each pressure pulse signal of sensor record of bottom of device.
Explosive loading of the present invention continuous multiple-pulse load loading experimental apparatus, the technique effect brought is embodied in the following aspects:
1) the present invention can carry out the loading of continuous multiple-pulse load to explosive loading, and each pulse loading stress and load time can effectively control;
2) the present invention to explosive carry out continuous multiple-pulse load load time, consider powder charge damage effect, can more real simulant missile penetration stratification target time Service Environment, and then its overload-resistant security of scientific evaluation.
Accompanying drawing explanation
Fig. 1 is explosive loading of the present invention continuous multiple-pulse load loading experimental apparatus structural representation.
Fig. 2 is the structural representation of middle sleeve of the present invention.
Fig. 3 be in the present invention on hit the structural representation of post.
Label in figure represents respectively: hit post 1,2, cushion pad, 3, cushion pad, 4, sleeve, 5, cushion pad, 6, in hit post, 7, sample, 8, under hit post, 9, sensor, 1-1 annular brace, 1-2 annular groove, 1-3, annular brace, 1-4, annular groove.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail, it should be noted that the present invention is not limited to following specific embodiment, and all equal conversion carried out on technical solution of the present invention basis are all in protection scope of the present invention.
Defer to technique scheme, as shown in Figure 1-Figure 3, the present embodiment provides a kind of explosive loading continuous multiple-pulse load loading experimental apparatus, comprises and hits post 1, cushion pad 2, cushion pad 3, cushion pad 5, sleeve 4, in hit post 6, sample 7, under hit post 8 and sensor 9.Wherein, on to hit post 1 be steel solid cylinder with annular brace 1-1 and annular brace 1-3, and one end larger with sleeve 4 internal diameter is connected, the spacing of annular brace 1-1 and annular brace 1-3 0.5cm longer than the length of larger section of sleeve 4 internal diameter with the thickness sum of cushioning supportive 1-3; Sleeve 4 is the inner steel cylinder body being processed with step through-hole, and the part that sleeve 4 internal diameter is less is provided with cushion pad 3, cushion pad 5 successively, in hit post 6, sample 7 and under hit post 8, on hit post 1 cylindrical section, in hit post 6, sample 7, under hit post 8 and all coordinate with the internal diameter H9/g8 of sleeve 4; Cushion pad 3 is the torus that soft state aluminium is made, thickness 1cmm, its internal diameter 0.5cm, external diameter than the diameter of sleeve 4 diameter larger end little 1cm larger than the diameter above hitting post 1 cylindrical section; The right cylinder that cushion pad 5 is made for wool pad, thickness is 3cm, diameter than sleeve 4 diameter compared with the little 1cm of the diameter of small end; In hit post 6 and under hit post 8 and be steel cylinder, the internal diameter of one end that its diameter is little with sleeve 4 internal diameter is equal, and length-diameter ratio is about 1 ~ 2:1; Sample 7 is casting dress TNT explosive column, and length-diameter ratio is 1:1 ~ 1.5, and in the present embodiment, the length-diameter ratio of sample 7 is 1:1; The torus that cushion pad 2 is made for wool pad, thickness is 1cm, is installed on the end of sleeve 4, the internal diameter 0.5cm larger than the diameter of the larger end of sleeve 4 diameter of cushion pad 2, external diameter 1cm less of the external diameter of sleeve 4; Under hit post 8 is provided with steel cylinder shape sensor 9 away from the one end above hitting post 1, described sensor 9 according to use time reality pressure select model and range, the present embodiment selects homemade strain gauge transducer, and range selects 0-1000MPa.
Hitting post 1 on described is steel solid cylinder with annular brace 1-1 and annular brace 1-3, and the ratio above hitting the length and its total length that post 1 exceeds sleeve 4 end face part is 1:3, on hit the diameter 1cm less of sleeve 4 external diameter of the annular brace 1-1 of post 1, the thickness sum of the cushioning supportive that the diameter of annular brace 1-3 is less with diameter than the spacing of diameter little 0.5cm, annular brace 1-1 and the annular brace 1-3 of the larger end of sleeve 4 internal diameter the length of larger than sleeve diameter section should be about 0.5cm, root edge being hit cylindrical section one week annular brace 1-1 and annular brace 1-3 of post 1 is processed with annular groove 1-2 and annular groove 1-4 respectively, the radius of annular groove 1-2 and annular groove 1-4 is about 2mm, annular groove 1-2 and annular groove 1-4 is as the stress concentration point in loading procedure, can THE ADIABATIC SHEAR IN rupture after making annular brace 1-1 and annular brace 1-3 reach certain stress, the thickness of annular brace 1-1 and annular brace 1-3 and the predetermined per sample loading stress of the radius of annular groove 1-2 and annular groove 1-4 are determined, in the present embodiment, the thickness of annular brace 1-1 and annular brace 1-3 is 1cm, the radius of annular groove 1-2 and annular groove 1-4 is 2mm.
Described sleeve 4 for internal diameter be the steel cylinder body of stepped hole, sleeve 4 inner wall smooth, the large one end of internal diameter with on hit post 1 and be connected, the length of one end that internal diameter is large is about 1:3 with the ratio of its total length, internal diameter is 1:4 compared with the internal diameter of small end and the ratio of external diameter, and the internal diameter of the larger end of internal diameter is 1:2 with the ratio of external diameter.
Hit in described post 6 and under hit post 8 and be steel solid cylinder, the internal diameter of one end that its diameter is little with sleeve 4 internal diameter is equal, in hit post length-diameter ratio be 1:1, under hit post 8 length-diameter ratio be 2:1.
The torus that described cushion pad 5 is made for wool felt, in loading procedure, first cushion pad 2 is compacted, and forms first pulse to sample 7, and the intensity of pulse and load time are determined by the thickness of cushion pad 5 and density.In the present embodiment, cushion pad 5 thickness is 3cm, diameter than sleeve 4 diameter compared with the little 1cm of the diameter of small end, to guarantee that cushion pad 5 has enough deformation spaces in loading procedure.
Described cushion pad 3 is the torus that soft state aluminium is made; after cushion pad 5 is compacted; cushion pad 3 contacts with annular brace 1-3; cushion pad 3 is extruded by annular brace 1-3; adjustment is hit loading stress and load time that post 1 is delivered to sample 7; form second pulse; in the present embodiment; cushion pad 3 thickness is 1cm; its internal diameter 0.5cm larger than the diameter above hitting post 1 cylindrical section; external diameter 1cm less of the diameter of the larger end of sleeve 4 diameter, to guarantee that cushion pad 3 has the space of enough distortion in loading procedure.
The torus that described cushion pad 2 is made for wool felt; after cushion pad 3 and cushion pad 5 are compacting; cushion pad 2 contacts with annular brace 1-1; cushion pad 2 is extruded by annular brace 1-1; adjustment is hit loading stress and load time that post 1 is delivered to sample 7; form the 3rd pulse; in the present embodiment; cushion pad 2 thickness is 1cm; internal diameter 0.5cm larger than the diameter of the larger end of sleeve 4 diameter; external diameter 1cm less of the external diameter of sleeve 4, to guarantee that cushion pad 2 has the space of enough distortion in loading procedure.
Using method of the present invention and principle of work as follows: explosive loading continuous multiple-pulse load loading experimental apparatus each parts are installed, and annular brace 1-1 and annular brace 1-3 is kept at a certain distance away with cushion pad 2 and cushion pad 3 respectively, the spacing distance of annular brace 1-1 and cushion pad 2 should to be all compacted the overall height variable quantity of rear cushion pad 3 and cushion pad 5 equal with cushion pad 3 and cushion pad 5, and the spacing distance of annular brace 1-3 and cushion pad 3 should to be compacted the high variable quantity of rear cushion pad 5 equal with cushion pad 5; After package unit assembling, be placed on fixing platform, utilize to adopt in the object strikes of rapid movement and hit post 1, by on hit post 1 pair of cushion pad 5 and sample 7 applies axial compressive stress, because cushion pad 5 compressibility is strong, therefore under axial stress effect, first cushion pad 5 is compacted, thus first pressure pulse is produced to sample 7, Qinzhou harbor can be simulated and invade ground floor soil layer; After cushion pad 5 is compacted, annular brace 1-3 just in time contacts with cushion pad 3, under the effect of annular brace 1-3, cushion pad 3 is compressed, thus second pressure pulse is formed to sample, because the intensity of cushion pad 3 is higher than cushion pad 5, therefore the intensity of second pressure pulse is better than first pressure pulse, can simulate Qinzhou harbor thickness of being unearthed and enter cemented rock layer; After cushion pad 3 is compacted, under the effect of axial force, above hit post 1 and will continue to move downward, stress concentration point can be formed at annular groove 1-4 place, thus cut off annular brace 1-2; After cushion pad 3 is compacted, annular brace 1-1 just in time contacts with cushion pad 2, now because the intensity of cushion pad 3 is higher than cushion pad 2, therefore cushion pad 2 is by the process of annular brace 1-1 compacting, be actually the process of second pressure pulse unloading, after Qinzhou harbor pulp building block rock layers can be simulated, enter discrete material layer; In like manner, after cushion pad 2 is compacted, under the effect of axial force, on hit post 1 and will continue to move downward, can form stress concentration point at annular groove 1-2 place, thus cut off annular brace 1-1, now axial stress will directly act on sample 6, produce a larger pressure pulse, can simulate after penetration ejects discrete material layer and enter reinforced concrete floor.The peak stress of pressure pulse and action time can be regulated by the thickness of cushion pad 2, cushion pad 3 and cushion pad 5 and material, and record each pressure pulse signal by sensor 9.
Explosive loading of the present invention continuous multiple-pulse load loading experimental apparatus can carry out continuous print multiple-pulse load to explosive test specimen and load, each pulse loading stress peak value and load time can effectively control, Service Environment during warhead explosive loading penetration stratification target can be simulated more really, and then its overload-resistant security of scientific evaluation.
Claims (4)
1. an explosive loading continuous multiple-pulse load loading experimental apparatus, comprise and hit post (1), cushion pad (2), cushion pad (3), sleeve (4), cushion pad (5), in hit post (6), sample (7), under hit post (8) and sensor (9), wherein, on to hit post (1) be band annular brace (1-1) and the steel solid cylinder of annular brace (1-3), and one end larger with sleeve (4) internal diameter is connected, the ratio hitting the length and its total length that post (1) exceeds sleeve (4) end face part on described is 1:2 ~ 3, on hit the diameter comparatively little about 1 ~ 1.5cm of sleeve (4) external diameter of the larger annular brace (1-1) of post (1) diameter, the diameter that the annular (1-3) that diameter is less supports 0.5 ~ 1cm less of the diameter of the larger end of sleeve (4) internal diameter, the thickness sum of the spacing of annular brace (1-1) and annular brace (1-3) and the less annular brace (1-3) of diameter should be about 0.5 ~ 1cm than the length of larger section of sleeve (4) internal diameter, described sleeve (4) is the inner steel cylinder body being processed with step through-hole, the length of one end that sleeve (4) internal diameter is large is about 1:3 with the ratio of its total length, internal diameter is 1:3 ~ 4 compared with the internal diameter of small end and the ratio of external diameter, the internal diameter of the larger end of internal diameter is about 1:1.5 ~ 2 with the ratio of external diameter, the part that sleeve (4) internal diameter is less be provided with successively cushion pad (3), cushion pad (5), in hit post (6), sample (7) and under hit post (8), cushion pad (2) is installed on sleeve (4) near the end above hitting post (1) one end, under hit post (8), away from the one end above hitting post (1), sensor (9) be installed, on hit post (1) cylindrical section, in hit post (6), sample (7) and under hit the equal and H9/g8 clearance fit of the internal diameter of all less with sleeve (4) the internal diameter one end of post (8).
2. explosive loading continuous multiple-pulse load loading experimental apparatus as claimed in claim 1, it is characterized in that, the internal diameter 0.5cm more about than the diameter of the larger end of sleeve (4) diameter of described cushion pad (2), external diameter about 1 ~ 1.5cm less of the external diameter of sleeve (4).
3. explosive loading continuous multiple-pulse load loading experimental apparatus as claimed in claim 1, it is characterized in that, internal diameter 0.5cm, external diameter than the diameter of sleeve (4) the diameter larger end little about 1 ~ 1.5cm more about than the diameter above hitting post (1) cylindrical section of described cushion pad (3).
4. explosive loading continuous multiple-pulse load loading experimental apparatus as claimed in claim 1, is characterized in that, the diameter about 1 ~ 1.5cm less of compared with the diameter of small end sleeve (4) diameter of described cushion pad (5).
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| CN106018464A (en) * | 2016-05-13 | 2016-10-12 | 西安近代化学研究所 | Explosive loading and penetrating stability evaluation method based on equivalent model experiment |
| CN109187913A (en) * | 2018-08-28 | 2019-01-11 | 西安近代化学研究所 | A kind of cylinder test Simplified Test Equipment |
| CN109406385A (en) * | 2018-12-14 | 2019-03-01 | 中国工程物理研究院流体物理研究所 | A kind of intrusion loading device suitable for cylindrical explosive substitute material |
| CN109490106A (en) * | 2018-11-19 | 2019-03-19 | 西安近代化学研究所 | A kind of lower grainend stress measurement device of low speed impact load |
| CN110530787A (en) * | 2019-09-05 | 2019-12-03 | 西安近代化学研究所 | A kind of explosive stress test device based on multiple pulses test |
| CN113030425A (en) * | 2021-02-01 | 2021-06-25 | 中北大学 | Explosive stability evaluation experimental device for equivalently simulating penetration of projectile into steel target |
| CN113848132A (en) * | 2021-09-23 | 2021-12-28 | 中国工程物理研究院流体物理研究所 | Long pulse width multi-pulse loading test device based on gunpowder driving |
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| CN109406385A (en) * | 2018-12-14 | 2019-03-01 | 中国工程物理研究院流体物理研究所 | A kind of intrusion loading device suitable for cylindrical explosive substitute material |
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| CN110530787A (en) * | 2019-09-05 | 2019-12-03 | 西安近代化学研究所 | A kind of explosive stress test device based on multiple pulses test |
| CN110530787B (en) * | 2019-09-05 | 2022-05-24 | 西安近代化学研究所 | Explosive stress testing device based on multiple pulse tests |
| CN113030425A (en) * | 2021-02-01 | 2021-06-25 | 中北大学 | Explosive stability evaluation experimental device for equivalently simulating penetration of projectile into steel target |
| CN113030425B (en) * | 2021-02-01 | 2023-01-03 | 中北大学 | Explosive stability evaluation experimental device for equivalent simulation projectile penetration steel target |
| CN113848132A (en) * | 2021-09-23 | 2021-12-28 | 中国工程物理研究院流体物理研究所 | Long pulse width multi-pulse loading test device based on gunpowder driving |
| CN113848132B (en) * | 2021-09-23 | 2023-07-04 | 中国工程物理研究院流体物理研究所 | Long pulse width multi-pulse loading test device based on gunpowder driving |
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