CN110441169A - A kind of sound combination electromagnetism load Hopkinson rock bar wave propagation test device - Google Patents
A kind of sound combination electromagnetism load Hopkinson rock bar wave propagation test device Download PDFInfo
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- CN110441169A CN110441169A CN201910645658.0A CN201910645658A CN110441169A CN 110441169 A CN110441169 A CN 110441169A CN 201910645658 A CN201910645658 A CN 201910645658A CN 110441169 A CN110441169 A CN 110441169A
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- 239000011435 rock Substances 0.000 title claims abstract description 175
- 238000012360 testing method Methods 0.000 title claims abstract description 39
- 230000005284 excitation Effects 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 30
- 239000011888 foil Substances 0.000 claims description 11
- 239000004575 stone Substances 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000009738 saturating Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 8
- 230000003068 static effect Effects 0.000 abstract description 8
- 230000000644 propagated effect Effects 0.000 abstract description 7
- 238000011160 research Methods 0.000 description 10
- 230000007547 defect Effects 0.000 description 5
- 238000013401 experimental design Methods 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000010438 granite Substances 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/317—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by electromagnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/001—Impulsive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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- Pathology (AREA)
- Electromagnetism (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Test device is propagated the present invention provides a kind of sound combination electromagnetism load Hopkinson rock bar wave to be mainly made of loading frame system, rock lever system, electromagnetic pulse emission system, axis pressure SERVO CONTROL loading system, data monitoring and acquisition system.Loading frame system mainly presses load fixed baffle to form by support platform, connecting rod, rock rod bearing and axis, plays the role of providing support platform and guides rock rod piece centering.Rock lever system is equal by the diameter for meeting different tests demand, length and in varying numbers, the equal or unequal rock bar composition of material.Electromagnetic pulse emission system is mainly made of electromagnetic pulse stress wave excitation cavity and its control system.Axis presses SERVO CONTROL loading system to be made of hydraulic stroker, axis pressure load piston and axis pressure servo-control system.Axis presses the function of SERVO CONTROL loading system for load, holding and the unloading of Programmed control oil supply system, it is ensured that static shaft is pressed in test process and keeps relative stability.
Description
Technical field
The invention belongs to stress wave propagation research fields in rock mass.More specifically to one kind for stress in rock mass
Wave is propagated and the sound combination electromagnetism load Hopkinson rock bar wave of attenuation law research propagates test device.
Background technique
Rock material is different from Other Engineering material, inside include a large amount of pre-existing defect, such as micropore
Hole, microfissure, joint, joint group and structural plane etc..These pre-existing defects not only control the mechanics of rock mass materials
Characteristic, the also wave characteristic (such as stress wave propagation and decaying) of significant impact rock mass.Therefore, study of rocks material and rock mass
Joint or joint group are to stress wave propagation and attenuation law inside the wave characteristic of structure, especially rock mass, to analysis and assessment rock
Body engineering the seismic wave or blast wave the effects of under safety and stability be particularly important.Currently, inside study of rocks
The defects of pre-existing joint fissure to wave propagate and the method for the influence of attenuation law there are mainly two types of, one is using super
Sound wave measuring system carries out high-frequency to jointed rock sample or rock sample containing internal flaw, the ultrasonic wave of low amplitude value is propagated
Measure the influence to analyze joint fissure to ultrasonic wave propagation and attenuation law；Another kind is to utilize traditional one-dimensional Hopkinson bar
Single joint pair is studied to carrying out amplitude containing single prefabricated jointed rock sample, the propagation of low-frequency one-dimension stress wane testing
The influence of stress wave propagation and attenuation law.Existing method is greatly promoted it is appreciated that and grasping rock joint to wave propagation
And attenuation law.But above two method is all based on equivalent diameter and length is respectively less than the small size rock for being equal to 50mm
The experimental study that joint is carried out, can not carry out and answer in large scale (rock mass length reaches meter level) rock mass close under actual condition
Reeb is propagated and attenuation law research.Therefore, the prior art could be improved.
Summary of the invention
Large scale (the rock mass length close under actual conditions can not be carried out to solve existing experimental provision and test method
Reach meter level) stress wave propagation and attenuation law research in rock mass structure, the present invention proposes a kind of sound combination electromagnetism load
Hopkinson rock bar wave propagates test device, compensates for the defect of stress wave propagation test research device in existing rock mass, especially
It is solve existing apparatus can not carry out consider the initial static stress of rock mass under the conditions of rock mass in stress wave propagation research skill
Art problem can be assessed for the design, protection and safety and stability of rock mass engineering project and provide important technical support.
Sound combines electromagnetism load Hopkinson rock bar wave and propagates test device mainly by loading frame system, rock bar
System, electromagnetic pulse emission system, axis pressure SERVO CONTROL loading system, data monitoring and acquisition system form.
Loading frame system mainly presses load fixed baffle to form by support platform, connecting rod, rock rod bearing and axis, rises
To providing support platform and guide the effect of rock rod piece centering.Rock lever system is mainly by meeting the diameter of different tests demand
It is equal, length and in varying numbers, the equal or unequal rock bar composition of material.Electromagnetic pulse emission system is mainly by electromagnetic pulse
Stress wave excitation cavity and its control system are constituted.Axis presses SERVO CONTROL loading system mainly by hydraulic stroker, axis pressure load
Piston and axis pressure servo-control system composition.It is Programmed control oil supply system that axis, which presses the function of SERVO CONTROL loading system,
Load keeps and unloads, it is ensured that static shaft is pressed in test process and keeps relative stability.Data monitoring and acquisition system mainly by
Multi-channel high-speed synchronous recording instrument, foil gauge, Wheatstone bridge and strain signal amplifier are constituted, and can ensure that stress in rock mass
Wave is propagated test data completely and is effectively recorded and stored.
Fig. 1 is that sound combines electromagnetism load Hopkinson rock bar wave propagation test device three-dimensional figure, and experimental rig is placed in
In support platform 1, mainly by loading frame system, rock lever system, electromagnetic pulse emission system, axis pressure SERVO CONTROL load system
System, data monitoring and acquisition system form.Incidence end axis pressure load fixed baffle 2 is fixed on the incident-end of support platform 1,
Center and surrounding are respectively arranged with big hole and small sircle hole, and big hole and small sircle hole herein is opposite saying, i.e. incidence end
The size for the circular hole being arranged among axis pressure load fixed baffle 2 is greater than the size of the circular hole of surrounding setting, so being clear herein
's.The big hole of transmission end axis pressure load fixed baffle 11 and small sircle hole are the same as understanding herein below.
Electromagnetic pulse stress wave excitation cavity 3 passes through the center big hole of incidence end axis pressure load fixed baffle 2, and welds therewith
It connects to form overall structure, the incident end in contact of the loading end of electromagnetic pulse stress wave excitation cavity 3 and the first rock bar 5；First rock
Stone bar 5 is supported on load axis by rock rod bearing 6, the incidence of the transmission end section of the first rock bar 5 and the second rock bar 7
End section contact, two contacting sections constitute the first joint 12, and the second rock bar 7 is supported on load axis by rock rod bearing 6
On, the transmission end section of the second rock bar 7 is contacted with the incident end section of third rock bar 8, and two contacting sections constitute second
Joint 13；Third rock bar 8 is supported on load axis by rock rod bearing 6, and transmission end section presses load piston 9 to connect with axis
Touching；Axis pressure load piston 9 is linked together with hydraulic stroker 10, for the oil pressure in hydraulic stroker to be transferred to rock
In bar；Hydraulic stroker 10 pass through transmission end axis pressure load fixed baffle 11 center big hole, and therewith welding formed it is whole
Body structure；Transmission end axis pressure load fixed baffle 11 is placed in support platform transmission end, and can be according to the length of rock lever system
It needs to be moved forward and backward the length for adjusting rock bar test macro in support platform；Connecting rod 4 is each passed through the pressure load of incidence end axis
The small sircle hole of fixed baffle 2 and transmission end axis pressure load 11 surrounding of fixed baffle, by loading frame system, rock lever system, electricity
Magnetic field impulse emission system and axis pressure SERVO CONTROL loading system are connected as an overall structure, for realizing sound combination electromagnetism load
Hopkinson rock bar wave propagates testing research.
In order to solve the problems, such as that in the prior art, the present invention provides a kind of sound combination electromagnetism to load Hopkinson rock bar
Wave propagates test device, and the test device is mainly by loading frame system, rock lever system, electromagnetic pulse emission system, axis pressure
SERVO CONTROL loading system, data monitoring and acquisition system form；
Loading frame system mainly presses load fixed baffle to form by support platform, connecting rod, rock rod bearing and axis, rock
Stone lever system is mainly equal by meeting the diameter of different tests demand, length and in varying numbers, the equal or unequal rock of material
Bar composition；Electromagnetic pulse emission system is mainly made of electromagnetic pulse stress wave excitation cavity and its control system；Axis presses servo control
Loading system processed is mainly made of hydraulic stroker, axis pressure load piston and axis pressure servo-control system；Data monitoring with
Acquisition system is mainly made of multi-channel high-speed synchronous recording instrument, foil gauge, Wheatstone bridge and strain signal amplifier；
The main building block title of the test device are as follows: support platform, incidence end axis pressure load fixed baffle, electromagnetism arteries and veins
Blow stress wave excitation cavity, the first rock bar, the second rock bar, third rock bar, axis pressure load piston, hydraulic stroker, thoroughly
Penetrate end axis pressure load fixed baffle；It is as follows with the connection relationship of upper-part:
Experimental rig is placed in support platform, and incidence end axis pressure load fixed baffle is fixed on the incidence end of support platform
Portion, center and surrounding are respectively arranged with big hole and small sircle hole, and big hole and small sircle hole herein is opposite saying, that is, enter
Penetrate the size that end axis presses the size for the circular hole being arranged among load fixed baffle to be greater than the circular hole that surrounding is arranged, electromagnetic pulse stress
Wave excitation cavity pass through incidence end axis pressure load fixed baffle center big hole, the loading end of electromagnetic pulse stress wave excitation cavity with
The incident end in contact of first rock bar；The transmission end section of first rock bar is contacted with the incident end section of the second rock bar, and two
Contacting section constitutes the first joint, and the transmission end section of the second rock bar is contacted with the incident end section of third rock bar, and two
Contacting section constitutes the second joint；Its transmission end section of third rock bar and axis pressure load piston contact；Axis pressure load piston
It is linked together with hydraulic stroker, the oil pressure in hydraulic stroker is transferred in rock bar by axis pressure load piston；It is hydraulic
Load cylinder passes through the center big hole of transmission end axis pressure load fixed baffle；Transmission end axis pressure load fixed baffle is placed in branch
Support platform transmission end；Connecting rod is each passed through incidence end axis pressure load fixed baffle and transmission end axis pressure loads fixed baffle surrounding
Loading frame system, rock lever system, electromagnetic pulse emission system and axis pressure SERVO CONTROL loading system are connected as by small sircle hole
One overall structure.
It as a further improvement of the present invention, further include several rock rod bearings, the first rock bar is by rock bar
Seat supports are on load axis, and the second rock bar is supported on load axis by rock rod bearing, and third rock bar is by rock
Rod bearing is supported on load axis.
As a further improvement of the present invention, electromagnetic pulse stress wave excitation cavity passes through incidence end axis pressure load fixed baffle
Center big hole, and therewith welding form overall structure.
As a further improvement of the present invention, hydraulic stroker is big across the center of transmission end axis pressure load fixed baffle
Circular hole, and welding forms overall structure therewith.
As a further improvement of the present invention, transmission end axis pressure load fixed baffle is placed in support platform transmission end, root
Need to be moved forward and backward the length for adjusting rock bar test macro in support platform according to the length of rock lever system.
As a further improvement of the present invention, the first joint and the second joint constitute a pair of of parallel cracks group.
As a further improvement of the present invention, several foil gauges are arranged in rock bar surface, and will be answered by shielded wire
Become piece and accesses to data monitoring and acquisition system.
As a further improvement of the present invention, filling mixture is formed between the first rock bar and the second rock bar contact surface
One the first joint of filling, filling mixture constitutes second joint of filling, first segment between the second rock bar and third rock bar
Reason and the second joint constitute a pair of of parallel cracks group, and according to test needs, two joint filler materials and water content can
It is identical also can not be identical.
The beneficial effects of the present invention are:
(1) sound combination electromagnetism load Hopkinson rock bar wave propagates the system of bars of test device by long rock bar group
At, can be used for carrying out stress wave propagation and attenuation law research in the jointed rock mass close under actual condition, compensate for it is existing suddenly
Pu Jinsen bar (metallic rod) equipment can not carry out the defect of stress wave propagation experimental study in Rock mass of large dimension structure.
(2) the electromagnetic pulse diversion stress wave that sound combination electromagnetism load Hopkinson rock bar wave propagates test device swashs
Hair system accurately control and can height it is duplicate generate amplitude, frequency incident stress wave, solve existing Hope
The gloomy bar apparatus of gold is difficult to control accurately and height repeats to generate the problem of incident stress wave.
(3) axis that sound combination electromagnetism load Hopkinson rock bar wave propagates test device presses SERVO CONTROL loading system
Static shaft pressure synchronous servo control can be achieved to load and can realize that static shaft pressure keeps phase in stress wave propagation rock bar
To stabilization, so that stress wave propagation and attenuation law research are more nearly real working condition in jointed rock mass, solves existing apparatus
The technical problem of stress wave propagation research in the rock mass under the conditions of considering the initial static stress of rock mass can not be carried out.
Detailed description of the invention
Fig. 1 is that sound combination electromagnetism load Hopkinson rock bar wave of the present invention propagates test device three-dimensional figure；
Fig. 2 is that sound combination electromagnetism load Hopkinson rock bar wave of the present invention propagates test device front view；
Fig. 3 is that sound combination electromagnetism load Hopkinson rock bar wave propagates test device top view.
Figure label corresponding component title is as follows:
1- support platform, 2- incidence end axis pressure load fixed baffle, 3- electromagnetic pulse stress wave excitation cavity, 4- connecting rod, 5-
First rock bar, 6- rock rod bearing, 7- the second rock bar, 8- third rock bar, 9- axis pressure load piston, 10- hydraulic loaded
Oil cylinder, 11- transmission end axis pressure load fixed baffle, the first joint 12-, the second joint 13-, 14- foil gauge.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
Preferred forms 1
It will process respectively and diameter of having polished is 50mm, Anshan rock rock bar conduct of long 1500mm, 1000mm, 1500mm
First rock bar 5, the second rock bar 7 and third rock 8.First rock bar and the second rock bar smooth contact form an approximation and close
The first joint 12 closed, the second rock bar and third rock bar still smooth contact are constituted with the second joint 13 of approximation closure,
First joint 12 and the second joint 13 constitute a pair of of parallel cracks group.We refer to closure joint refer to, two smooth face contacts
It is close to be combined and just constitutes the joint plane of a closure.
According to the duration of experiment test needs and the incident stress wave of combination, on rock bar surface, several paste strain
Piece 14, and foil gauge is accessed to by data monitoring and acquisition system by shielded wire.When experiment, according to experimental design, first lead to
Toning nodal axisn presses SERVO CONTROL loading system, presses load cylinder 10 and axis pressure load piston 9 along rock bar axial direction using axis
The axial static pressure for applying 3MPa to rock lever system, the self weight for simulating underground about 100m depth rock mass structure receiving are answered
Power is then excited and is generated with respective magnitudes and wavelength according to needed for experimental design by electromagnetic pulse stress wave excitation cavity 3
The incident stress wave of respectively 200MPa and 300 μ s, stress wave are propagated along the first, second and third rock bar immediately, and pass sequentially through the
One and second joint, and transmitted wave and back wave are generated at the first and second joints, using being pasted onto answering for rock bar surface
Incident stress wave on rock bar can be monitored and record at different location by becoming piece, the signal of reflection stress wave and transmission stress wave,
Finally based on the data of experimental monitoring, stress wave can be calculated and analyzed according to one-dismensional stress wave theory containing two parallel cracks
Propagation and attenuation law in rock mass.
Preferred forms 2
It will process respectively and diameter of having polished is 50mm, long is respectively the not damaged complete of 1500mm, 1500mm, 1500mm
Granite rock bar is as the first rock bar 5, the second rock bar 7 and third rock 8.First rock bar and the contact of the second rock bar
The mass percent that filling thickness is 2mm between face is 30% kaolin and 70% quartz sand (partial size is less than 1mm) mixture shape
At first joint 12 of filling, the mass percent that same filling thickness is 2mm between the second rock bar and third rock bar is
30% kaolin and 70% quartz sand (partial size is less than 1mm) mixture constitutes second joint 13 of filling, the first joint 12 and the
Two joints 13 constitute a pair of of parallel cracks group, and the water content of two joint fillers is identical and be 10%.Then every
One group of foil gauge 14 of stickup symmetrical above and below at the midpoint of root granite rock bar surface, and connect foil gauge by shielded wire
Enter to data monitoring and acquisition system.Next according to experimental design, adjustment axis pressure servo-control system is first passed through, axis pressure is utilized
Load cylinder 10 and axis pressure load piston 9 apply the axial static pressure of 27MPa along rock bar axial direction to rock lever system,
For simulating the weight stress of underground 1000m depth rock mass structure receiving, then excited by electromagnetic pulse stress wave excitation cavity 3
And generation wavelength duration, amplitude are respectively the incident stress wave of 200 μ s and 100MPa, stress wave is immediately along first, second and third
Rock bar is propagated, and passes sequentially through the first and second filling joints, and transmitted wave and reflection are generated at the first and second joints
Wave can monitor and be recorded using the foil gauge for being pasted onto rock bar surface incident stress wave on different rock bars, reflect stress
The signal of wave and transmission stress wave can be calculated and be analyzed according to one-dismensional stress wave theory finally based on the data of experimental monitoring
Stress wave is containing propagation and attenuation law in two parallel cracks rock mass.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, In
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (8)
1. a kind of sound combination electromagnetism load Hopkinson rock bar wave propagates test device, it is characterised in that:
The test device is mainly by loading frame system, rock lever system, electromagnetic pulse emission system, axis pressure SERVO CONTROL load
System, data monitoring and acquisition system form；
Loading frame system mainly presses load fixed baffle to form by support platform, connecting rod, rock rod bearing and axis, rock bar
System is mainly equal by meeting the diameter of different tests demand, length and in varying numbers, the equal or unequal rock bar group of material
At；Electromagnetic pulse emission system is mainly made of electromagnetic pulse stress wave excitation cavity and its control system；Axis pressure SERVO CONTROL adds
Loading system is mainly made of hydraulic stroker, axis pressure load piston and axis pressure servo-control system；Data monitoring and acquisition
System is mainly made of multi-channel high-speed synchronous recording instrument, foil gauge, Wheatstone bridge and strain signal amplifier；
The main building block title of the test device are as follows: support platform (1), the pressure load of incidence end axis fixed baffle (2), electromagnetism
Pulse stress wave excitation cavity (3), the first rock bar (5), the second rock bar (7), third rock bar (8), axis pressure load piston
(9), hydraulic stroker (10), transmission end axis pressure load fixed baffle (11)；It is as follows with the connection relationship of upper-part:
Experimental rig is placed on support platform (1), and entering for support platform (1) is fixed in incidence end axis pressure load fixed baffle (2)
End is penetrated, center and surrounding are respectively arranged with big hole and small sircle hole, and big hole and small sircle hole herein is opposite saying,
The size for the circular hole being arranged among incidence end axis pressure load fixed baffle (2) is greater than the size of the circular hole of surrounding setting, electromagnetism
Pulse stress wave excitation cavity (3) passes through the center big hole of incidence end axis pressure load fixed baffle (2), and electromagnetic pulse stress wave swashs
Send out the loading end of chamber (3) and the incident end in contact of the first rock bar (5)；The transmission end section and the second rock of first rock bar (5)
The incident end section of stone bar (7) contacts, and two contacting sections constitute the first joint (12), and the transmission end of the second rock bar (7) is cut
Face is contacted with the incident end section of third rock bar (8), and two contacting sections constitute the second joint (13)；Third rock bar (8)
It transmits end section and presses load piston (9) to contact with axis；Axis pressure load piston (9) is linked together with hydraulic stroker (10),
Oil pressure in hydraulic stroker is transferred in rock bar by axis pressure load piston (9)；Hydraulic stroker (10) passes through transmission
Hold the center big hole of axis pressure load fixed baffle (11)；It is saturating that transmission end axis pressure load fixed baffle (11) is placed in support platform
Penetrate end；Connecting rod (4) is each passed through incidence end axis pressure load fixed baffle (2) and transmission end axis pressure load fixed baffle (11) surrounding
Small sircle hole, by loading frame system, rock lever system, electromagnetic pulse emission system and axis pressure SERVO CONTROL loading system connect
It is integral structure.
2. a kind of sound combination electromagnetism load Hopkinson rock bar wave according to claim 1 propagates test device,
It is characterized in that: further including several rock rod bearings (6), the first rock bar (5) is supported on load by rock rod bearing (6)
On axis, the second rock bar (7) is supported on load axis by rock rod bearing (6), and third rock bar (8) is by rock rod bearing
(6) it is supported on load axis.
3. a kind of sound combination electromagnetism load Hopkinson rock bar wave according to claim 1 propagates test device,
Be characterized in that: electromagnetic pulse stress wave excitation cavity (3) passes through the center big hole of incidence end axis pressure load fixed baffle (2), and
Welding forms overall structure therewith.
4. a kind of sound combination electromagnetism load Hopkinson rock bar wave according to claim 1 propagates test device,
Be characterized in that: hydraulic stroker (10) passes through the center big hole of transmission end axis pressure load fixed baffle (11), and welds therewith
It connects to form overall structure.
5. a kind of sound combination electromagnetism load Hopkinson rock bar wave according to claim 1 propagates test device,
Be characterized in that: transmission end axis pressure load fixed baffle (11) is placed in support platform transmission end, according to the length of rock lever system
It needs to be moved forward and backward the length for adjusting rock bar test macro in support platform.
6. a kind of sound combination electromagnetism load Hopkinson rock bar wave according to claim 1 propagates test device,
Be characterized in that: the first joint (12) and the second joint (13) constitute a pair of of parallel cracks group.
7. a kind of sound combination electromagnetism load Hopkinson rock bar wave according to claim 1 propagates test device,
Be characterized in that: several foil gauges are arranged in rock bar surface, and foil gauge is accessed to data monitoring and adopted by shielded wire
Collecting system.
8. a kind of sound combination electromagnetism load Hopkinson rock bar wave according to claim 1 propagates test device,
Be characterized in that: filling mixture forms first joint of filling, the second rock between the first rock bar and the second rock bar contact surface
Filling mixture constitutes second joint of filling, the first joint (12) and the second joint (13) structure between stone bar and third rock bar
Parallel cracks group in a pair, and according to test needs, two joint filler materials and water content can identical also can not be identical.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910645658.0A CN110441169A (en) | 2019-07-17 | 2019-07-17 | A kind of sound combination electromagnetism load Hopkinson rock bar wave propagation test device |
| PCT/CN2019/115486 WO2021008010A1 (en) | 2019-07-17 | 2019-11-05 | Dynamic and static combined electromagnetic loading hopkinson rock rod wave propagation test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910645658.0A CN110441169A (en) | 2019-07-17 | 2019-07-17 | A kind of sound combination electromagnetism load Hopkinson rock bar wave propagation test device |
Publications (1)
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| CN111855343A (en) * | 2020-06-28 | 2020-10-30 | 东南大学 | Rock joint dynamic mechanical property and wave propagation rule indoor experimental device and method |
| CN112665995A (en) * | 2020-12-17 | 2021-04-16 | 武汉理工大学 | Parallel Hopkinson bar simulation instant unloading test device and method |
| CN114544357A (en) * | 2022-01-26 | 2022-05-27 | 深圳大学 | Testing device and testing method for testing dynamic and static combined tensile and shearing strength of solid material |
| CN115452551A (en) * | 2022-08-23 | 2022-12-09 | 中国人民解放军空军工程大学 | Pneumatic Hopkinson torsion bar device and operation method |
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| CN113188906B (en) * | 2021-04-25 | 2022-05-20 | 重庆科技学院 | Rock uniaxial tension test device and method |
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