CN106989997B - A kind of device of indirect measurement coarse structure face dynamic rate - Google Patents
A kind of device of indirect measurement coarse structure face dynamic rate Download PDFInfo
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- CN106989997B CN106989997B CN201710231786.1A CN201710231786A CN106989997B CN 106989997 B CN106989997 B CN 106989997B CN 201710231786 A CN201710231786 A CN 201710231786A CN 106989997 B CN106989997 B CN 106989997B
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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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording 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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic 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
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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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
- G01N2203/0658—Indicating or recording means; Sensing means using acoustic or ultrasonic detectors
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Abstract
The invention discloses a kind of devices of coarse structure face dynamic rate of measurement indirectly, including counter-force loading frame, rock sample restraint device and ultrasound test system, counter-force loading frame includes crossbeam, column, crossbeam inverse force axis, jack loading axis, hydraulic jack, hydralic pressure gauge, pressurized handgrip and pedestal, rock sample restraint device includes metal cylinder and bolt, ultrasound test system includes transmitting transducer, receive energy converter and supersonic wave test instrument, column is connect with crossbeam and pedestal by nut respectively, hydraulic jack is placed on the center of pedestal, it is connected by bolts at two ends；Hydralic pressure gauge is mounted on the side of hydraulic jack, and top surface is equipped with jack loading axis in hydraulic jack, and partial outer face is machined with the groove graduated scale of one week measurement top half rock sample rotation angle in metal cylinder, and scale is uniformly distributed, 20 ° of master calibration interval.The present invention can measure the dynamic rate in coarse structure face under the conditions of different stress, different structure face matching coefficient indirectly.
Description
Technical field
The present invention relates to rock mass dynamics laboratory experiment fields, and in particular to a kind of coarse structure face of measurement indirectly dynamic is rigid
The device of degree.
Background technique
When earthquake or underground explosion occur, the energy part generated travels to surrounding rock body in the form of stress wave
In.Usually there is a large amount of no-continuous discontinuities in nature rock mass, when stress wave encounters these structures in communication process
When face, amplitude decays, phase change, and frequency reduces.Propagation law of the stress wave at structural plane is typically controlled by knot
The dynamic deformation feature in structure face, and this dynamic deformation feature is usually portrayed by the dynamic rate of structural plane.Therefore, structural plane
Effective measurement of dynamic rate propagates analysis model for establishing stress wave in rock mass, and is applied to rock mass earthquake geological hazard
Prevention and evaluation have great importance.
The test of rock test piece indoor dynamic is the important channel for testing coarse structure face dynamic rate.Due to laboratory experiment
It is directly logical using stress and deformation of traditional split hopkinson bar (SHPB) test coarse structure face under power effect
It is often more complicated, and the result poor repeatability that same coarse structure face repeatedly measures, therefore measurement is preferred experiment side indirectly
Method.
The dynamic rate in coarse structure face usually with its locating for stress state and structural plane degree of agreement it is related.Due to
At present still without the device for measurement coarse structure face indirectly, therefore urgently develops and a kind of can consider coarse structure face simultaneously
The device and its test method of the indirect measurement structure face dynamic rate of stress state and degree of agreement.
Summary of the invention
To solve the above problems, being utilized the present invention provides a kind of device of coarse structure face dynamic rate of measurement indirectly
It is rigid that the device and its test method can measure dynamic of the coarse structure face under different stress and under different matching coefficients
Degree.
To achieve the above object, the technical scheme adopted by the invention is as follows:
A kind of device of indirect measurement coarse structure face dynamic rate, including counter-force loading frame, rock sample restraint device and
Ultrasound test system, the counter-force loading frame include crossbeam, column, crossbeam inverse force axis, jack loading axis, hydraulic jack
Top, hydralic pressure gauge, pressurized handgrip and pedestal, rock sample restraint device include metal cylinder and bolt, and ultrasound test system includes transmitting
Energy converter receives energy converter and supersonic wave test instrument, and the column is connect with crossbeam and pedestal by nut respectively, described hydraulic
Jack is placed on the center of pedestal, the two by the bolt at both ends connection；Hydralic pressure gauge is mounted on the one of hydraulic jack
Side, top surface is equipped with jack loading axis in hydraulic jack, and partial outer face is machined with one week measurement upper half in metal cylinder
Divide the groove graduated scale of rock sample rotation angle, scale is uniformly distributed, 20 ° of master calibration interval；Four are partially processed under metal cylinder
Symmetrical threaded hole can effectively fix lower half portion rock sample by tightening bolt；Transmitting transducer abuts crossbeam inverse force axis
With top half rock sample, receives energy converter and abut jack loading axis and lower half portion rock sample；Crossbeam inverse force axis, transmitting transducing
Device, top half rock sample, lower half portion rock sample, the axis coincidence for receiving energy converter and jack loading axis, to guarantee to load
Stability in journey.Jack loading axis is moved up by continuously pressing pressurized handgrip, normal force is applied to rock sample, thus
Realize the different stress in coarse structure face, the numerical value of pressure is recorded by hydralic pressure gauge.
Preferably, the transmitting transducer and reception energy converter are by cylindrical high-strength alloy outer steel shell, piezoelectric ceramics
Piece, bottom surface cover board composition；The natural frequency of vibration of the piezoelectric ceramic piece of two energy converters is identical, is placed on the circle of cylindrical shell end
Inside cylindrical groove, then pass through bottom surface cover plate for sealing；Cylindrical housing interior is machined with lead and pours out hole, and side wall, which is machined with, to be drawn
The other end of line leading-out terminal, cylindrical shell is also machined with cylinder shape groove；The internal diameter of groove is slightly larger than crossbeam inverse force axis
With the diameter of jack loading axis；When test, crossbeam inverse force axis and jack loading axis are inserted into the groove of two energy converters,
To guarantee the whole stability during loading of energy converter, rock sample and sleeve；Transmitting transducer and the inside for receiving energy converter
It is machined with lead and pours out hole, side wall is machined with lead leading-out terminal.
Preferably, the crossbeam, column, crossbeam inverse force axis and pedestal are process by high strength alloy steel.
Preferably, the crossbeam is using square as the cuboid of bottom surface, and there are two symmetrical for both ends processing nearby
Penetrate cylindrical hole, middle part is welded with crossbeam inverse force axis；Crossbeam inverse force axis is short cylinder, the width of basal diameter and crossbeam
It spends identical；The quantity of the column is two, is cylindrical body, main diameter and crossbeam it is of same size, add at both ends
Work is at helicitic texture, the diameter for being directly slightly less than crossbeam both ends cylindrical hole of thread segment；Two sides of base symmetrical machining two penetrate
Cylindrical hole, diameter is identical as the diameter of crossbeam both ends cylindrical hole；Distance and crossbeam two terminal circle on pedestal between two cylindrical holes
Distance between post holes is identical；
Preferably, it is connected between the column and crossbeam and pedestal by nut, is machined between two columns of pedestal
Two symmetrical roundlet cylindricalitys penetrate threaded hole, and center and the center of the large cylindrical threaded hole at column are maintained at same
On straight line, pedestal and hydraulic jack by be set in two roundlet cylindricality threaded holes bolt connects.
Preferably, the metal cylinder is process by high strength alloy steel, and with a thickness of 1-2cm, height is rock to be measured
The 2/3 of body height of specimen, internal diameter are slightly larger than the diameter of rock test piece to be measured；There are four symmetrical point for the processing of metal cylinder lower end
The cylinder of cloth penetrates threaded hole.The rock test piece containing coarse structure face is put into rock sample restraint device when test, is guaranteed
The length that sample is exposed at metal cylinder both ends is of substantially equal, is pushed against by twisting bolt and fixes rock sample lower half portion, and top half
It is freely rotatable and obtains different structural plane matching coefficients.
The invention patent has the advantages that
Rock test piece is loaded by hydraulic jack, coarse structure face can be made to be in different stress states, is led to
The different goodnesses of fit for crossing the rotation available coarse structure face of top half rock sample, to can realize while consider coarse structure face
The measurement of dynamic rate under the conditions of same different stress, different degree of agreement.
Detailed description of the invention
Fig. 1 is the device of that embodiment of the invention total arrangement structural schematic diagram.
Fig. 2 is the oblique view of metal cylinder, the connection structure of rock sample and bolt in the embodiment of the present invention.
Fig. 3 is the top view of metal cylinder, the connection structure of rock sample and bolt in the embodiment of the present invention.
Fig. 4 is metal cylinder, the vertical profile figure of the connection structure of rock sample and bolt in the embodiment of the present invention.
Fig. 5 is metal cylinder, the transverse cross-sectional view of the connection structure of rock sample and bolt in the embodiment of the present invention.
Fig. 6 is ultrasonic transducer structure schematic diagram in the embodiment of the present invention
Fig. 7 is to separate superposition ripple schematic illustration using window function in the embodiment of the present invention.
Fig. 8 is the centre frequency that FFT calculates separation postwave in the embodiment of the present invention.
Fig. 9 is the coarse structure face in the case of fitting like a glove in the embodiment of the present invention.
Figure 10 is the coarse structure face not exclusively coincideing in situation in the embodiment of the present invention.
Specific implementation
In order to which objects and advantages of the present invention are more clearly understood, the present invention is carried out with reference to embodiments further
It is described in detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit this hair
It is bright.
As shown in figs 1 to 6, the embodiment of the invention provides a kind of device of coarse structure face dynamic rate of measurement indirectly,
It is characterised in that it includes counter-force loading frame, rock sample restraint device and ultrasound test system, the counter-force loading frame include
Crossbeam 1, column 2, crossbeam inverse force axis 3, jack loading axis 10, hydraulic jack 11, hydralic pressure gauge 12, pressurized handgrip 13 and pedestal
14, rock sample restraint device includes metal cylinder 6 and bolt 7, and ultrasound test system includes transmitting transducer 4, receives 9 and of energy converter
Supersonic wave test instrument 15, the column 2 are connect with crossbeam 1 and pedestal 14 by nut respectively, and the hydraulic jack 11 is placed
In the center of pedestal 14, the two by the bolt at both ends connection；Hydralic pressure gauge 12 is mounted on the side of hydraulic jack 11, liquid
Top surface is equipped with jack loading axis 10 on pressure jack 11, and partial outer face is machined with one week measurement upper half in metal cylinder 6
The groove graduated scale for dividing rock sample 5 to rotate angle, scale are uniformly distributed, 20 ° of master calibration interval；The lower part processing four of metal cylinder 6
A symmetrical threaded hole can effectively fix lower half portion rock sample 8 by tightening bolt 7；It is anti-that transmitting transducer 4 abuts crossbeam
Power axis 3 and top half rock sample 5 receive energy converter 9 and abut jack loading axis 10 and lower half portion rock sample 8；Crossbeam inverse force axis
3, transmitting transducer 4, top half rock sample 5, lower half portion rock sample 8, the axis weight for receiving energy converter 9 and jack loading axis 10
It closes, to guarantee the stability in loading procedure.Jack loading axis 10 is moved up by continuously pressing pressurized handgrip 13, it is right
Rock sample applies normal force, to realize the different stress in coarse structure face, the numerical value of pressure is recorded by hydralic pressure gauge 12.
The transmitting transducer 4 and reception energy converter 9 are by cylindrical high-strength alloy outer steel shell, piezoelectric ceramic piece, bottom
Surface cover composition；The natural frequency of vibration of the piezoelectric ceramic piece of two energy converters is identical, is placed on the cylinder of cylindrical shell end
Inside groove, then pass through bottom surface cover plate for sealing；Cylindrical housing interior is machined with lead and pours out hole, and side wall is machined with lead and leads
The other end of terminal out, cylindrical shell end is also machined with cylinder shape groove；The internal diameter of groove is slightly larger than crossbeam inverse force axis
With the diameter of jack loading axis 10；When test, crossbeam inverse force axis 3 and jack loading axis 10 are inserted into the recessed of two energy converters
In slot, to guarantee the whole stability during loading of energy converter, rock sample and sleeve；Transmitting transducer 4 and reception energy converter 9
Inside be machined with lead and pour out hole, side wall is machined with lead leading-out terminal.
The crossbeam 1, column 2, crossbeam inverse force axis 3 and pedestal 14 are process by high strength alloy steel.
The crossbeam 1 is using square as the cuboid of bottom surface, and both ends nearby process and penetrate there are two symmetrical
Cylindrical hole, middle part are welded with crossbeam inverse force axis 3；Crossbeam inverse force axis 3 is short cylinder, the width of basal diameter and crossbeam 1
It is identical；The quantity of the column 2 is two, is cylindrical body, main diameter is of same size with crossbeam 1, adds at both ends
Work is at helicitic texture, the diameter for being directly slightly less than 1 both ends cylindrical hole of crossbeam of thread segment；14 two sides symmetrical machining of pedestal two is worn
Saturating cylindrical hole, diameter are identical as the diameter of 1 both ends cylindrical hole of crossbeam；Distance and crossbeam 1 on pedestal 14 between two cylindrical holes
Distance between the cylindrical hole of both ends is identical；
It is connected between the column 2 and crossbeam 1 and pedestal 14 by nut, is being machined between two columns 2 of pedestal 14
Two symmetrical roundlet cylindricalitys penetrate threaded hole, and center and the center of the large cylindrical threaded hole at column 2 are maintained at same
On straight line, pedestal 14 and hydraulic jack 11 by be set in two roundlet cylindricality threaded holes bolt connects.
The metal cylinder 6 is process by high strength alloy steel, and with a thickness of 1-2cm, height is rock test piece to be measured
The 2/3 of height, internal diameter are slightly larger than the diameter of rock test piece to be measured；There are four symmetrical for the processing of 6 lower end of metal cylinder
Cylinder penetrates threaded hole.As shown in Figure of description 4- Fig. 5, the rock test piece containing coarse structure face is put into rock when test
In sample restraint device, guarantees that the length of 6 both ends of metal cylinder exposing sample is of substantially equal, pass through twisting bolt 7 and push against fixed rock sample
Lower half portion, and top half is freely rotatable and obtains different structural plane matching coefficients.
Test method
Principle using indirectly testing coarse structure of the present invention face dynamic rate is to be passed through after structural plane according to ultrasonic wave
Transmission coefficient carrys out the dynamic rate that inverse goes out coarse structure face.Stress wave can be expressed by the transmission coefficient in Linear Elastic Structure face
For
Z=ρ c is the impedance of rock in formula, and ρ is rock density, and the velocity of wave of c rock, the π of ω=2 f is the angle of incident ultrasound wave
Frequency, f are the frequency of incidence wave.
Expression formula by the available dynamic rate of (1) formula is
From (2) as long as formula can be seen that the wave impedance of the centre frequency, rock that have measured incidence wave and ultrasonic wave pass through slightly
The transmission coefficient of rough structural plane, so that it may which counterplot calculates its dynamic rate.Wherein transmission coefficient be defined as ultrasonic wave perpendicular through
Amplitude and ultrasonic wave after the rock test piece of the face of coarse structure containing single pass through the ratio between the amplitude after the complete rock sample of equal length.
The step of using indirectly testing coarse structure face of the present invention, is as follows:
S1 is by as shown in the accompanying drawings 1 installing all parts of counter-force loading frame.
Complete rock sample is put into metal cylinder 6 by S2, and the length for keeping both ends to expose sample is of substantially equal.In the end of rock sample
One layer of vacuum grease is smeared, to have good coupling between guarantee and energy converter, is then consolidated complete rock sample by bolt 7
It is fixed.
Crossbeam inverse force axis 3 and jack loading axis 10 are inserted into transmitting transducer 4 respectively and receive 9 end of energy converter by S3
In cylinder shape groove.The metal cylinder 6 for securing rock sample is placed among two energy converters, is applied by jack pair test specimen pre-
Fixed normal pressure.The normal pressure of structural plane can be calculated by following formula
D in formula1And d2The respectively diameter of jack and rock sample, P are the reading of jack pressure table.
S4 supersonic wave test instrument gives transmitting transducer 4 one driving voltage signals, causes its piezoelectric ceramic piece to generate mechanical
Vibration signal.Vibration signal is changed by wave amplitude, frequency after test specimen etc., is reached and is received energy converter 9, its piezoelectricity is caused to be made pottery
Tile generates voltage signal.
S5 supersonic wave test instrument records and saves down the voltage signal received, and sending out signals are recorded for calculating incidence wave
Centre frequency and amplitude.Since the length of test specimen in test process is shorter, the transmission waveform received by reception energy converter is
Preliminary wave and the rear superposition to wave Bu Tong then that is formed in interface multiple reflections.In order to obtain the width of true incidence wave
Value, it should to the separation of wave is overlapped by the transmitted wave after complete rock sample test piece with the influence after eliminating to wave.Using 1/4
Cycle Cosine window function metht is overlapped the separation of wave, such as the specific implementation steps of Figure of description 7 are as follows: a is opened from oscillation starting points
Begin to choose the waveform of one section of Fixed Time Interval to be usually a periodic waveform as signal to be processed；B is constructed within this time
The cosine function in 1/4 period that amplitude is 1 is as window function；Window function be multiplied with signal to be processed by c can be obtained just
The incidence wave signal of beginning.By the amplitude A of the available original incident wave of waveform after separating0, pass through such as 8 institute of specification annex map
Show that the frequency f of original incident wave can be obtained in fast Fourier analysis FFT, so as to which angular frequency is calculated.
Complete rock sample is changed into the rock test piece in the face of coarse structure containing single by S6, keeps experiment condition constant, repeats S2-
S5 obtains ultrasonic wave and passes through the transmission wave amplitude A behind single coarse structure face1.It is worth noting that the Chief Signal Boatswain chosen at this time
It is identical when degree is with complete sample.It is possible thereby to which transmission coefficient is calculated
According to obtained transmission coefficient t, wave impedance z and angular frequency, coarse structure face can be calculated by formula (2)
Dynamic rate.
S7, curved by 3 points or vertical pulling tests to obtain coarse structure face, presses coarse structure face such as Figure of description 9 and breaks
The complete split of broken face obtains the coarse structure that matching coefficient is 1 and interviews part, and draws a reference line parallel with axis in side.
Then using method shown in Figure of description 10, the test specimen containing the coarse structure face to fit like a glove is put into metal cylinder 5, is led to
Cross the fixed lower half portion rock sample 8 of four bolts.By making top half rock sample 5 rotate 10 ° of angle, 20 °, 30 ° ... 360 °, can obtain
To the coarse structure face of different matching coefficients.
Embodiment
For the more detailed test method for introducing indirectly testing structural plane dynamic rate of the present invention, it is described below one
Specific embodiment.Test specimen is process by the dam foundation griotte in I grades of power stations of silk screen, and the velocity of longitudinal wave for measuring rock is Vp=
5100m/s, density are ρ=2600kg/m3, P- wave impedance z=1.326 × 10 of rock material can be calculated7kg/(m2s)。
The stimulating frequency of the ultrasonic probe used is 70kHz.Test of the ultrasonic wave by complete rock sample is carried out first, by Fig. 7 and Fig. 8
Method the waveform of record is handled to obtain the amplitude A of incidence wave0=0.886V, centre frequency f=68kHz can be calculated
Angular frequency=1.36 × 10 out5rad/s.Then 1MPa, 2MPa are applied to the test specimen of the structural plane as shown in Fig. 7 containing single
With the normal pressure of 3MPa, and the waveform of record is handled by the method for Fig. 7 and Fig. 8.Measure the transmission under three kinds of operating conditions
The amplitude of wave is respectively 0.655V, 0.718V and 0.766V, thus can be calculated corresponding transmission coefficient be respectively 0.74,
0.81 and 0.86.According to (2) formula, the dynamic normal stiffness k in 1MPa, 2MPa and 3MPa flowering structure face can be calculatednRespectively equal to
3420Gpa/m, 4580GPa/m and 5720GPa/m.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, it can also make several improvements and retouch, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (6)
1. a kind of device of the coarse structure face dynamic rate of measurement indirectly, which is characterized in that about including counter-force loading frame, rock sample
Bundle device and ultrasound test system, the counter-force loading frame includes crossbeam (1), column (2), crossbeam inverse force axis (3), very heavy
Push up loading axis (10), hydraulic jack (11), hydralic pressure gauge (12), pressurized handgrip (13) and pedestal (14), rock sample restraint device packet
Metal cylinder (6) and bolt (7) are included, ultrasound test system includes transmitting transducer (4), receives energy converter (9) and ultrasound
It tries instrument (15), the column (2) is connect with crossbeam (1) and pedestal (14) by nut respectively, and the hydraulic jack (11) is put
Set the center in pedestal (14), the two by the bolt at both ends connection；Hydralic pressure gauge (12) is mounted on hydraulic jack (11)
Side, top surface is equipped with jack loading axis (10) in hydraulic jack (11), and partial outer face is machined in metal cylinder (6)
The groove graduated scale of one week measurement top half rock sample (5) rotation angle, scale are uniformly distributed, 20 ° of master calibration interval；Metal
Four symmetrical threaded holes are partially processed under cylinder (6), can effectively be fixed lower half portion rock sample (8) by tightening bolt (7)；
Transmitting transducer (4) abuts crossbeam inverse force axis (3) and top half rock sample (5), receives energy converter (9) and abuts jack loading axis
(10) and lower half portion rock sample (8)；Crossbeam inverse force axis (3), transmitting transducer (4), top half rock sample (5), lower half portion rock
Sample (8), the axis coincidence for receiving energy converter (9) and jack loading axis (10).
2. a kind of device of coarse structure face dynamic rate of measurement indirectly as described in claim 1, which is characterized in that the hair
It penetrates energy converter (4) and receives energy converter (9) and be made of cylindrical high-strength alloy outer steel shell, piezoelectric ceramic piece, bottom surface cover board；
The natural frequency of vibration of the piezoelectric ceramic piece of two energy converters is identical, is placed on inside the cylinder shape groove of cylindrical shell end, so
Pass through bottom surface cover plate for sealing afterwards；Cylindrical housing interior is machined with lead and pours out hole, and side wall is machined with lead leading-out terminal, cylinder
The other end of shape shell is also machined with cylinder shape groove；The internal diameter of groove is slightly larger than crossbeam inverse force axis and jack loading axis
(10) diameter.
3. a kind of device of coarse structure face dynamic rate of measurement indirectly as described in claim 1, which is characterized in that the cross
Beam (1), column (2), crossbeam inverse force axis (3) and pedestal (14) are process by high strength alloy steel.
4. a kind of device of coarse structure face dynamic rate of measurement indirectly as described in claim 1, which is characterized in that the cross
Beam (1) is using square as the cuboid of bottom surface, and both ends are nearby processed there are two the symmetrical cylindrical hole that penetrates, in the middle part of
It is welded with crossbeam inverse force axis (3)；Crossbeam inverse force axis (3) is short cylinder, and basal diameter is of same size with crossbeam (1)；Institute
The quantity for stating column (2) is two, is cylindrical body, main diameter is of same size with crossbeam (1), is processed at both ends
Helicitic texture, the diameter of thread segment are slightly less than the diameter of crossbeam (1) both ends cylindrical hole；Pedestal (14) two sides symmetrical machining two
The cylindrical hole penetrated, diameter are identical as the diameter of crossbeam (1) both ends cylindrical hole；Distance on pedestal (14) between two cylindrical holes with
Distance between the cylindrical hole of crossbeam (1) both ends is identical.
5. a kind of device of coarse structure face dynamic rate of measurement indirectly as described in claim 1, which is characterized in that described vertical
It is connect, is machined between two columns (2) of pedestal (14) symmetrical by nut between column (2) and crossbeam (1) and pedestal (14)
Two roundlet cylindricalitys of distribution penetrate threaded hole, and center and the center of the large cylindrical threaded hole at column (2) are maintained at same
On straight line, pedestal (14) and hydraulic jack (11) by be set in two roundlet cylindricality threaded holes bolt connects.
6. a kind of device of coarse structure face dynamic rate of measurement indirectly as described in claim 1, which is characterized in that the gold
Belong to cylinder (6) to be process by high strength alloy steel, with a thickness of 1-2cm, height is the 2/3 of rock test piece height to be measured,
Internal diameter is slightly larger than the diameter of rock test piece to be measured；The processing of metal cylinder (6) lower end is penetrated there are four symmetrical cylinder
Threaded hole.
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| CN107796711B (en) * | 2017-09-20 | 2019-11-19 | 天津大学 | A method of for testing complete sample and structural plane dynamic shear strength |
| CN108896662A (en) * | 2018-07-05 | 2018-11-27 | 中国石油天然气集团有限公司 | A kind of multi-measuring point rock core sonic test device |
| CN109100423A (en) * | 2018-10-15 | 2018-12-28 | 吉林大学 | Damage of rock test experimental bed under a kind of ultrasonic activation |
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| CN114030220A (en) * | 2021-09-28 | 2022-02-11 | 上海华龙测试仪器有限公司 | High-rigidity double-frame loading system |
| CN115343368B (en) * | 2022-08-31 | 2024-05-31 | 大连理工大学 | Ultrasonic detection clamp for interface rigidity of disk drum of aeroengine |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090011204A (en) * | 2007-07-25 | 2009-02-02 | 한국과학기술원 | Rock mass dynamic testing apparatus |
| CN101915807A (en) * | 2010-07-13 | 2010-12-15 | 河海大学 | Ultrasonic testing auxiliary device in nonmetallic material failure process |
| CN102830171A (en) * | 2012-08-03 | 2012-12-19 | 中国科学院地质与地球物理研究所 | Rock mass test piece ultrasonic testing device |
| CN205374381U (en) * | 2016-02-18 | 2016-07-06 | 河南理工大学 | Coal petrography ultrasonic wave experimental system under unipolar loading condition |
-
2017
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090011204A (en) * | 2007-07-25 | 2009-02-02 | 한국과학기술원 | Rock mass dynamic testing apparatus |
| CN101915807A (en) * | 2010-07-13 | 2010-12-15 | 河海大学 | Ultrasonic testing auxiliary device in nonmetallic material failure process |
| CN102830171A (en) * | 2012-08-03 | 2012-12-19 | 中国科学院地质与地球物理研究所 | Rock mass test piece ultrasonic testing device |
| CN205374381U (en) * | 2016-02-18 | 2016-07-06 | 河南理工大学 | Coal petrography ultrasonic wave experimental system under unipolar loading condition |
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