CN105928871B - A kind of packaged explosive friction testing system and its test method - Google Patents
A kind of packaged explosive friction testing system and its test method Download PDFInfo
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- CN105928871B CN105928871B CN201610370117.8A CN201610370117A CN105928871B CN 105928871 B CN105928871 B CN 105928871B CN 201610370117 A CN201610370117 A CN 201610370117A CN 105928871 B CN105928871 B CN 105928871B
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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Abstract
The invention discloses a kind of packaged explosive friction testing system and its test methods, the former includes support frame, it is fixed in the mounting assembly of support frame as described above, the pressure-applying unit of drop hammer speed charging assembly and the lower section of top, explosive to be measured is fixed by the mounting assembly, it further include the static electric charge amplifier being electrically connected with pressure sensor, it is set to the circumferential strain piece of friction sleeve circumferential direction, and obtain the high-speed camera test suite of friction velocity between explosive to be measured and friction sleeve wall, static electric charge amplifier is connect with oscillograph, circumferential strain piece is connect by electric bridge with statical strain indicator, intelligent terminal is incorporated to by statical strain indicator.The test macro is able to detect radial pressure variation, and it is detected by the coefficient of friction under speed charging assembly and pressure-applying unit realization friction speed and pressure condition that drops hammer, influence of the quantitative analysis external world friction condition for coefficient of friction under high pressure, high-speed condition is realized, the scope of application and simulation precision of friction testing system are improved.
Description
Technical field
The present invention relates to explosive stability analysis technical fields more particularly to a kind of rubbed based on the packaged explosive to drop hammer to survey
Test system.The invention further relates to a kind of test methods based on above-mentioned test macro.
Background technique
Explosive is easy as a kind of high-energy chemistry substance by extraneous various factors (as rubbed, shearing, impact etc.) effect
Stimulation and light a fire, wherein friction be explosive igniting a key factor.Especially for explosive loading in low speed penetration mistake
Response process in journey, the friction between explosive and shell case and explosive are an important factor for explosive occur premature burst, influences stability.
Meanwhile for the heat that macroscopic view friction generates, the selection of explosive coefficient of friction often determines the accuracy of phenomenological calculation.
Therefore, just seemed especially using the determination of packaged explosive friction testing system detection difference explosive coefficient of friction under different operating conditions
It is important.
Powder and the experiment of the friction sensitivity of shaped-charge are still the main means for investigating explosive friction response problem at present.
Although the method that some quantitative analysis explosive friction processes have been proposed in numerous researchers, the scope of application all compares
It is small, it cannot still handle friction response problem of the shaped-charge under high pressure, High-Speed Loading.For example, under high pressure load, no
Influence with friction velocity to friction process；Under identical speed is horizontal, influence etc. of the different interfacial pressures to friction process.Cause
This, provides a kind of packaged explosive friction testing system, to realize the quantitative analysis external world friction condition under high pressure, high-speed condition
Influence for coefficient of friction improves the scope of application and test simulation precision of friction testing system, just becomes art technology
Personnel's urgent problem to be solved.
Summary of the invention
The object of the present invention is to provide a kind of packaged explosive friction testing systems, to realize under high pressure, high-speed condition
Influence of the quantitative analysis external world friction condition for coefficient of friction improves the scope of application and test simulation essence of friction testing system
Degree.It is a further object of the present invention to provide a kind of test methods based on the test macro.
To achieve the goals above, the present invention provides a kind of packaged explosive friction testing system, including support frame, is fixed in
The mounting assembly of support frame as described above, the speed charging assembly that drops hammer above the mounting assembly, and it is located at the installation group
Pressure-applying unit below part, explosive to be measured are fixed by the mounting assembly, and the speed charging assembly that drops hammer is for driving
Piston, which drops hammer, to be moved downward, and the pressure-applying unit and mounting assembly cooperate to the explosive application axial compressive force to be measured；
The mounting assembly includes the friction sleeve guide rail that support frame as described above is fixed in its lower end, loaded on the friction sleeve
Friction bush support on the inside of cylinder guide rail, and the friction sleeve being threadedly coupled with the friction bush support, the explosive to be measured
Piece is installed in the friction sleeve；
Upperpush rod and down-pressed pole are installed, the top of the upperpush rod passes through the friction sleeve branch in the friction sleeve
Frame is simultaneously threadedly coupled with the friction sleeve guide rail, and bottom end is resisted against the upper surface of the explosive to be measured, the speed of dropping hammer
Degree charging assembly is moved downward for driving piston to drop hammer, and then hits the friction bush support；The top of the down-pressed pole
It is resisted against the lower end surface of the explosive to be measured, bottom end is equipped with pressure sensor, and the pressure sensor bottom end is equipped with
Sensor stand, the pressure-applying unit apply axial compressive force to the sensor stand；
It further include response test system, the response test system includes the Static Electro being electrically connected with the pressure sensor
Lotus amplifier, the circumferential strain piece for being set to the friction sleeve circumferential direction, and obtain the explosive to be measured and the friction sleeve
The high-speed camera test suite of friction velocity, the static electric charge amplifier are connect with oscillograph between cylinder barrel, the week
It is connect to foil gauge by electric bridge with statical strain indicator, and the intelligent terminal is incorporated to by the statical strain indicator.
Further, the speed charging assembly that drops hammer includes the cylinder guide rail being fixed on support frame as described above, along vertical
The piston that direction is slidably mounted on the cylinder guide rail drops hammer, is installed on the cylinder end piece of cylinder guide rail upper end, and lateral
Being set to pin sequence described in the pin sequence of the cylinder guide rail includes multiple pins, and the diameter of section of each pin is different.
Further, the pressure-applying unit includes hydraulic cylinder and hydraulic cylinder leg, and the cylinder barrel of the hydraulic cylinder passes through
Hydraulic cylinder leg is fixed in support frame as described above, and cylinder rod end is resisted against the sensor stand.
Further, support frame as described above includes from top to bottom the first support plate disposed in parallel, the second support plate and third
Support plate is connected between first support plate and second support plate by positioning support bar, second support plate
It is connected between the third support plate by positioning support plate；
The cylinder guide rail is installed on first support plate, and the friction sleeve guide rail is installed on second support
Plate, the hydraulic cylinder leg are installed on the third support plate.
Further, the positioning support bar is four, and the four positioning support bars are divided into first support plate
Quadrangle.
The present invention also provides a kind of packaged explosive friction testing methods, are used for packaged explosive friction testing as described above system
In system, comprising the following steps:
It is that explosive to be measured applies axial compressive force by pressure-applying unit, is radially expanded explosive generation to be measured, and drive
Friction sleeve generation is radially expanded, and realizes the load of interface normal pressure between explosive to be measured and the friction sleeve；
The variation for recording the friction sleeve outer surface circumferential strain in real time, to realize the explosive to be measured and described
The real-time monitoring of interface normal pressure between friction sleeve；
After interface normal pressure reaches preset value between the explosive to be measured and the friction sleeve, pass through speed of dropping hammer
Piston in charging assembly, which drops hammer, to be accelerated to fall；What the piston dropped hammer goes out thorax speed by different cross section diameter in pin sequence
Pin control；
After the piston drops hammer release, sleeve will be rubbed linearly to push with friction bush support collision
It moves downward, and sliding friction occurs with the explosive to be measured；
In friction process, by the variation of the pressure sensor real time recording interface frictional force, and pass through the high speed
Camera obtains the friction velocity between the explosive to be measured and the friction sleeve.
Packaged explosive friction testing system provided by the invention includes support frame, the installation group for being fixed in support frame as described above
Part, the speed charging assembly that drops hammer above the mounting assembly, and the pressure-applying unit below the mounting assembly, to
It surveys explosive to fix by the mounting assembly, the speed charging assembly that drops hammer is used to that the piston to be driven to drop hammer downward fortune
Dynamic, the pressure-applying unit and the mounting assembly cooperate to the explosive application axial compressive force to be measured；The mounting assembly packet
It includes and the friction sleeve guide rail of support frame as described above is fixed in, loaded on the friction sleeve branch on the inside of the friction sleeve guide rail with its lower end
Frame, and the friction sleeve being threadedly coupled with the friction bush support, the explosive to be measured are installed in the friction sleeve；
Upperpush rod and down-pressed pole be installed in the friction sleeve, the top of the upperpush rod pass through the friction bush support and with institute
It states friction sleeve guide rail to be threadedly coupled, bottom end is resisted against the upper surface of the explosive to be measured, the speed load group of dropping hammer
Part is moved downward for driving the piston to drop hammer, and then hits the friction bush support；The top of the down-pressed pole against
In the lower end surface of the explosive to be measured, bottom end is equipped with pressure sensor, and the pressure sensor bottom end is equipped with sensing
Device bracket, the pressure-applying unit apply axial compressive force to the sensor stand；It further include response test system, the response is surveyed
Test system includes the static electric charge amplifier being electrically connected with the pressure sensor, the circumferential direction for being set to the friction sleeve circumferential direction
Foil gauge, and obtain the high-speed camera test group of friction velocity between the explosive to be measured and the friction sleeve wall
Part, the static electric charge amplifier are connect with oscillograph, and the circumferential strain piece is connect by electric bridge with statical strain indicator, and is led to
It crosses the statical strain indicator and is incorporated to the intelligent terminal.The test macro is able to detect radial pressure variation, and passes through speed of dropping hammer
It spends charging assembly and pressure-applying unit realizes that the coefficient of friction under friction speed and pressure condition detects, realize in high pressure, high speed
Under the conditions of influence of the quantitative analysis external world friction condition for coefficient of friction, improve the scope of application and survey of friction testing system
Try simulation precision.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only one recorded in the present invention
A little embodiments are also possible to obtain other drawings based on these drawings for those of ordinary skill in the art.
Fig. 1 is a kind of structural schematic diagram of specific embodiment of packaged explosive friction testing system provided by the present invention.
Description of symbols:
Cylinder end piece 1, cylinder guide rail 2, piston drop hammer 3, pin sequence 4, the first support plate 5, positioning support bar 6, friction
Sleeve guide rail 7, upperpush rod 9, sleeve pin nail 10, friction sleeve 11, explosive to be measured 12, is circumferentially answered at friction bush support 8
Become piece 13, down-pressed pole 14, the second support plate 15, pressure sensor 16, sensor stand 17, positioning support plate 18, hydraulic cylinder
19, hydraulic cylinder leg 20, third support plate 21.
Specific embodiment
Core of the invention is to provide a kind of packaged explosive friction testing system, to realize under high pressure, high-speed condition
Influence of the quantitative analysis external world friction condition for coefficient of friction improves the scope of application and numerical simulation essence of friction testing system
Degree.Another core of the invention is to provide a kind of test method based on the test macro.
In order to make those skilled in the art more fully understand technical solution of the present invention, below in conjunction with attached drawing to this hair
It is bright to be further detailed.
Referring to FIG. 1, Fig. 1 is a kind of knot of specific embodiment of packaged explosive friction testing system provided by the present invention
Structure schematic diagram.
In a specific embodiment, what the present invention provided packaged explosive friction testing system includes support frame, affixed
In the mounting assembly of support frame as described above, the speed charging assembly that drops hammer above the mounting assembly, and it is located at the installation
Pressure-applying unit below component, explosive 12 to be measured are fixed by the mounting assembly, and the speed charging assembly that drops hammer is used for
It drives the piston to drop hammer 3 to move downward, the pressure-applying unit, which cooperates with the mounting assembly to the explosive 12 to be measured, to be applied
Add axial compressive force；The mounting assembly is included the friction sleeve guide rail 7 for being fixed in support frame as described above with its lower end, rubbed loaded on described
The friction bush support 8 of 7 inside of sleeve guide rail, and the friction sleeve 11 being threadedly coupled with the friction bush support 8 are wiped, it is described
Explosive 12 to be measured is installed in the friction sleeve 11；Upperpush rod 9 and down-pressed pole 14, institute are installed in the friction sleeve 11
The top for stating upperpush rod 9 passes through the friction bush support 8, and is threadedly coupled with the friction sleeve guide rail 7, bottom end against
In the upper surface of the explosive 12 to be measured, the speed charging assembly that drops hammer 3 is moved downward for driving the piston to drop hammer,
And then hit the friction bush support 8；The top of the down-pressed pole 14 is resisted against the lower end surface of the explosive to be measured 12,
Bottom end is equipped with pressure sensor 16, and 16 bottom end of pressure sensor is equipped with sensor stand 17, the pressure-applying unit to
The sensor stand 17 applies axial compressive force；It further include response test system, the response test system includes and the pressure
The static electric charge amplifier of force snesor electrical connection is set to the circumferential circumferential strain piece 13 of the friction sleeve 11, and obtains
The high-speed camera test suite of friction velocity, the static state between the explosive to be measured 12 and friction 11 barrel of sleeve
Charge amplifier is connect with oscillograph, and the circumferential strain piece 13 is connect by electric bridge with statical strain indicator, and by described quiet
State deformeter is incorporated to the intelligent terminal.The test macro is able to detect radial pressure variation, and passes through speed load group of dropping hammer
Part and pressure-applying unit realize the coefficient of friction detection under friction speed and pressure condition, and it is fixed under high pressure, high-speed condition to realize
Amount analyzes influence of the extraneous friction condition for coefficient of friction, improves the scope of application and numerical simulation essence of friction testing system
Degree.
Specifically, the speed charging assembly that drops hammer includes the cylinder guide rail 2 being fixed on support frame as described above, along vertical side
3 are dropped hammer to the piston for being slidably mounted on the cylinder guide rail 2, are installed on cylinder end piece 1 and the side of 2 upper end of cylinder guide rail
It include multiple pins to pin sequence 4 described in the pin sequence 4 for being set to the cylinder guide rail 2, the diameter of section of each pin is each
It is different.Wherein, cylinder end piece 1 is connected for closed gas with gas cylinder, piston drop hammer 3 for hit friction bush support 8, cylinder is led
Rail 2 is used for closed gas, and limits piston and drop hammer 3, guarantees that piston drops hammer the linearity of 3 travelings, pin sequence 4 is defeated for controlling
Air pressure out, so control piston drop hammer 3 go out thorax speed；The pin sequence 4 includes multiple pins, the section of the multiple pin
Diameter is different.
Above-mentioned pressure-applying unit includes hydraulic cylinder 19 and hydraulic cylinder leg 20, and the cylinder barrel of the hydraulic cylinder 19 passes through hydraulic
Jar support 20 is fixed in support frame as described above, and cylinder rod end is resisted against the sensor stand 17, stretches in 19 cylinder rod of hydraulic cylinder
It constantly presses to realize being radially expanded for explosive 12 and friction sleeve 11 to be measured to sensor stand 17 when out.It is apparent that
Pressure-applying unit may be the structure that cylinder or electric cylinders etc. can be realized axial stretching.
Specifically, support frame as described above includes from top to bottom the first support plate 5 disposed in parallel, the second support plate 15 and third
Support plate 21 is connected between first support plate 5 and second support plate 15 by positioning support bar 6, and described second
It is connected between support plate 15 and the third support plate 21 by positioning support plate 18；The cylinder guide rail 2 is installed on described
First support plate 5, the friction sleeve guide rail 7 are installed on second support plate 15, and the hydraulic cylinder leg 20 is installed on institute
State third support plate 21.Support frame structure using this kind of structure is simple, and can be realized the installation and support of each main component,
The support frame can also use the form of truss.
Above-mentioned positioning support bar 6 is four, and the four positioning support bars 6 are divided into the quadrangle of first support plate 5, with
Guarantee stability of strutting system.
When installing the test macro, the major architectural of sub-body first can be installed, then upper body is installed, before experiment
The core component of sub-body is installed again.
Specifically, positioning support plate 18 is installed in third support plate 21 first when installation sub-body major architectural,
Then the second support plate 15 is installed on 18 upper end of positioning support plate.Then, upperpush rod 9 is installed in friction sleeve guide rail 7
The sleeve guide rail 7 that rubs then is installed on the upper end of the second support plate 15 by portion.Then positioning support bar 6 is installed on second
The quadrangle of fagging 15.The first support plate 5 is linked together with positioning support bar 6 finally, completes test macro sub-body master
Want the installation of frame.During installation, it can be bolted, or can be cooperated by groove, the embodiment of the present invention is not
It is limited to this.
In embodiments of the present invention, friction sleeve guide rail 7 mainly has two aspect effects: one is subject to from lower end hydraulic cylinder
The axial compressive force of body 19, to apply axial compressive force to explosive 12 to be measured；Second is that guaranteeing friction sleeve branch by arc-shaped side slot
The axial linearity that frame 8 is run.
When installing upper body, cylinder guide rail 2 is fixed in the first support plate of lower end 5 first, then passes through pin sequence
Column 4, which drop hammer piston, 3 to be fixed in cylinder guide rail 2, cylinder end piece 1 is finally put on O-shaped rubber ring, and be mounted in cylinder guide rail 2
Top, and by the connection of nitrogen gas cylinder and 2 top of cylinder guide rail, complete the installation of test macro upper body.It can between part
To be bolted, or by being threadedly engaged, the embodiment of the present invention is not limited to this.
Before running the test macro, need to install explosive 12 to be measured.Circumferential strain piece 13 is attached to sleeve outer wall first
Position corresponding with explosive 12 to be measured is connect then by friction sleeve 11 by being threadedly engaged with friction bush support 8, then
Upperpush rod 9 is passed through, is put into friction sleeve guide rail 7, the fixed position of sleeve pin nail 10 is passed through.It then will be prefabricated to be measured
Explosive 12 (30 × 10mm of Φ) is fitted into friction sleeve 11, then successively installs down-pressed pole 14 down, pressure sensor 16, sensing
Device bracket 17, hydraulic cylinder 19 and hydraulic cylinder leg 20, and hydraulic pump is connect with hydraulic cylinder 19, complete the explosive to be measured
12 installation.
The test macro further includes building friction response test system, when installing the friction response test system, first
Static electric charge amplifier is connected with pressure sensor 16, and accesses oscillograph, forms axial compressive force test macro；It then will be all
It is connect to foil gauge 13 by electric bridge with statical strain indicator, and accesses computer, form radial pressure test macro；Finally build height
Fast photographic apparatus test macro, the system can be used for obtaining the friction velocity between explosive and sleeve wall, complete a whole set of friction and ring
Answer building for test macro.
In embodiments of the present invention, packaged explosive frictional experiment can be carried out by the test macro.Specifically, testing
When, radial pressure test macro is first turned on, which can be used for monitoring the change of the radial pressure of explosive 12 to be measured
Change.Be then turned on hydraulic pump, make 19 main shaft of hydraulic cylinder rise, slowly to explosive 12 to be measured apply axial compressive force, make to
It surveys the generation of explosive 12 and is radially expanded (explosive is having a size of 30 × 10mm of Φ), so that extrusion friction sleeve 11, makes its slight expansion,
Circumferential strain ε is generated in friction 11 appearance of sleevet, circumferential answer can be read by the statical strain indicator in radial pressure test macro
Become εt, and the normal pressure P of friction 11 inner wall of sleeve is obtained by formula (1)i:
Wherein, E is the elasticity modulus of friction 11 material of sleeve, ReIt is its outer radius, RiIt is its inner radial.
When the reading shown in the statical strain indicator reaches prediction numerical value, stop applying pressure, is then turned on axial compressive force test
System, the test macro can be used for monitoring the variation of 12 axial compressive force of explosive to be measured, test the increment of Axial Force i.e.
For the numerical value of axial friction.Then the axial movement of friction sleeve 11 can be observed by high-speed photography system, read
The sleeve 11 that rubs is axially moved speed.
It rubs after response test system debug, the cylinder into the rate control module that drops hammer is filled with nitrogen, makes cylinder
Pressure rise, when pressure value reaches the shear strength of pin sequence 4, shear fracture occurs for pin sequence 4, for example, the pin
Pin in sequence 4 can be made of 45# steel, then shear strength 180MPa.The fracture of pin sequence 4 can make piston drop hammer 3
Accelerate to glide in cylinder guide rail 2, it is final to obtain required speed, the friction bush support 8 of lower end is hit, the sleeve that rubs is made
11 generate sliding friction with 12 side wall surface of explosive to be measured.The pin sequence 4 that varying cross-section diameter can be used, for adjusting
The initial release pressure of cylinder finally makes piston drop hammer the different stroke speed of 3 acquisitions, in such manner, it is possible to realize differentiated friction speed
The velocity interval of shaped-charge frictional experiment has been expanded in the load of degree.In addition, in friction process, axial compressive force test macro
Friction sleeve 11 can be monitored and the variation of face frictional force is kept away in 12 side of explosive to be measured.
In addition to above-mentioned test macro, the present invention also provides a kind of packaged explosive friction testing side based on the test macro
Method, comprising the following steps:
It is that explosive 12 to be measured applies axial compressive force by pressure-applying unit, is radially expanded the generation of explosive 12 to be measured, and
Driving friction sleeve 11 generation is radially expanded, realize explosive 12 to be measured and it is described friction sleeve 11 between interface normal pressure plus
It carries；
The variation for recording the friction 11 outer surface circumferential strain of sleeve in real time, to realize 12 He of explosive to be measured
The real-time monitoring of interface normal pressure between the friction sleeve 11；
After interface normal pressure reaches preset value between the explosive 12 to be measured and the friction sleeve 11, by dropping hammer
Piston in speed charging assembly drop hammer 3 acceleration whereabouts；The drop hammer 3 thorax speed that goes out of the piston is cut by different in pin sequence 4
The pin of face diameter controls；
It after the piston drops hammer 3 release, will be collided with friction bush support 8, to push friction sleeve along straight line side
Sliding friction occurs to moving downward, and with the explosive 12 to be measured；
In friction process, by the variation of the 16 real time recording interface frictional force of pressure sensor, and pass through the height
Fast camera obtains the friction velocity between the explosive to be measured 12 and the friction sleeve 11.
From the foregoing, it will be observed that the packaged explosive friction testing system and its test method of the embodiment of the present invention, to explosive to be measured
12 apply three-dimensional confining pressures, until the pressure of explosive 12 to be measured reaches preset value, then by control module of dropping hammer, drop hammer piston
3 apply pressure loadings, accelerate glide, thus make piston drop hammer 3 shocks friction bush support 8 so that friction sleeve 11 with it is to be measured
Explosive 12 rubs, then by test macro, measures the positive pressure in explosive 12 to be measured and friction 11 friction process of sleeve
Power, frictional force and friction velocity.So as to guarantee in the case where triaxial compressions act on, explosive 12 to be measured will not in friction process
Occur to be crushed, can preferably embody the friction response pattern between packaged explosive and sleeve wall；Can guarantee friction velocity or
Interface normal pressure realizes the single-factor consecutive variations of speed or pressure under a certain narrow change level, examines respectively to realize
Friction velocity and interface normal pressure are examined to the affecting laws of friction process；It in higher interface normal pressure (0~50MPa) and can rub
It wipes under speed (0~40m/s), the friction response of shaped-charge is analyzed, thus in shaped-charge quantitative analysis field, greatly
The loading range for having expanded explosive frictional experiment greatly also strengthens the completeness of explosive friction response data.
It is above that certain exemplary embodiments of the invention are only described by way of explanation, undoubtedly, for ability
The those of ordinary skill in domain without departing from the spirit and scope of the present invention can be with a variety of different modes to institute
The embodiment of description is modified.Therefore, above-mentioned attached drawing and description are regarded as illustrative in nature, and should not be construed as to the present invention
The limitation of claims.
Claims (5)
1. a kind of packaged explosive friction testing system, which is characterized in that including support frame, be fixed in the installation group of support frame as described above
Part, the speed charging assembly that drops hammer above the mounting assembly, and the pressure-applying unit below the mounting assembly, to
It surveys explosive (12) to fix by the mounting assembly, the speed charging assembly that drops hammer is for driving piston to drop hammer (3) downwards
Movement, the pressure-applying unit and the mounting assembly, which cooperate to the explosive (12) to be measured, applies axial compressive force；
The mounting assembly includes the friction sleeve guide rail (7) that support frame as described above is fixed in its lower end, loaded on the friction sleeve
Friction bush support (8) on the inside of cylinder guide rail (7), and the friction sleeve (11) being threadedly coupled with friction bush support (8),
The explosive to be measured (12) is installed in the friction sleeve (11)；
Upperpush rod (9) and down-pressed pole (14) are installed, the top of the upperpush rod (9) passes through described in the friction sleeve (11)
Friction bush support (8) is simultaneously threadedly coupled with the friction sleeve guide rail (7), and bottom end is resisted against the explosive to be measured (12)
Upper surface, it is described drop hammer speed charging assembly for drive piston drop hammer (3) move downward, and then hit the friction sleeve
Bracket (8)；
The top of the down-pressed pole (14) is resisted against the lower end surface of the explosive to be measured (12), and bottom end is equipped with pressure sensing
Device (16), the pressure sensor bottom end are equipped with sensor stand, and the pressure-applying unit is applied to the sensor stand (17)
Add axial compressive force；
It further include response test system, the response test system includes the Static Electro being electrically connected with the pressure sensor (16)
Lotus amplifier, the circumferential strain piece (13) for being set to described friction sleeve (11) circumferential direction, and obtain the explosive (12) to be measured
It is described friction sleeve (11) barrel between friction velocity high-speed camera test suite, the static electric charge amplifier with show
The connection of wave device, the circumferential strain piece (13) is connect by electric bridge with statical strain indicator, and is incorporated to by the statical strain indicator
Intelligent terminal；
The speed charging assembly that drops hammer includes the cylinder guide rail (2) being fixed on support frame as described above, along the vertical direction sliding peace
Piston loaded on the cylinder guide rail (2) drops hammer (3), is installed on cylinder end piece (1) and the side of cylinder guide rail (2) upper end
It include multiple pins, the section of each pin to pin sequence (4) the pin sequence (4) for being set to the cylinder guide rail (2)
Varying diameters.
2. packaged explosive friction testing system according to claim 1, which is characterized in that the pressure-applying unit includes hydraulic
The cylinder barrel of cylinder body (19) and hydraulic cylinder leg (20), the hydraulic cylinder (19) is fixed in the branch by hydraulic cylinder leg (20)
Support, cylinder rod end are resisted against the sensor stand (17).
3. packaged explosive friction testing system according to claim 2, which is characterized in that support frame as described above include by up to
Under the first support plate (5), the second support plate (15) and third support plate (21) disposed in parallel, first support plate (5) and
It is connected between second support plate (15) by positioning support bar (6), second support plate (15) and the third branch
It is connected between fagging (21) by positioning support plate (18)；The cylinder guide rail (2) is installed on first support plate (5),
The friction sleeve guide rail (7) is installed on second support plate (15), and the hydraulic cylinder leg (20) is installed on the third
Support plate (21).
4. packaged explosive friction testing system according to claim 3, which is characterized in that the positioning support bar (6) is
Four, the four positioning support bars (6) are divided into the quadrangle of first support plate (5).
5. a kind of packaged explosive friction testing method is used for packaged explosive friction testing according to any one of claims 1-4
In system, which comprises the following steps:
It is that explosive to be measured (12) apply axial compressive force by pressure-applying unit, explosive to be measured (12) is made to generate radial swollen account, and
Driving friction sleeve (11) is generated and is radially expanded, and realizes interface positive pressure between explosive to be measured (12) and the friction sleeve (11)
The load of power；
Record in real time it is described friction sleeve (11) outer surface circumferential strain variation, thus realize the explosive to be measured (12) and
The real-time monitoring of interface normal pressure between friction sleeve (11)；
After interface normal pressure reaches preset value between the explosive (12) to be measured and the friction sleeve (11), by dropping hammer
Piston in speed charging assembly, which drops hammer, to be accelerated to fall；What the piston dropped hammer goes out thorax speed by different sections in pin sequence (4)
The pin of face diameter controls；
After the piston drops hammer release, sleeve (11) will be rubbed along straight line side to push with friction bush support (8) collision
Sliding friction occurs to moving downward, and with the explosive (12) to be measured；
In friction process, by the variation of the pressure sensor (16) real time recording interface frictional force, and pass through high-speed photography
Device obtains the friction velocity between the explosive (12) to be measured and friction sleeve (11).
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| CN201610370117.8A CN105928871B (en) | 2016-05-30 | 2016-05-30 | A kind of packaged explosive friction testing system and its test method |
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| CN201610370117.8A CN105928871B (en) | 2016-05-30 | 2016-05-30 | A kind of packaged explosive friction testing system and its test method |
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| CN105928871B true CN105928871B (en) | 2019-10-25 |
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