CN106989997A - 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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- CN106989997A CN106989997A CN201710231786.1A CN201710231786A CN106989997A CN 106989997 A CN106989997 A CN 106989997A CN 201710231786 A CN201710231786 A CN 201710231786A CN 106989997 A CN106989997 A CN 106989997A
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- crossbeam
- pedestal
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- structure face
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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
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses 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, 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 constraint sleeve includes metal cylinder and bolt, ultrasound test system includes transmitting transducer, receive transducer and supersonic wave test instrument, column is connected with crossbeam and pedestal by nut respectively, hydraulic jack is placed on the center of pedestal, connected by bolts at two ends；Hydralic pressure gauge is arranged on top surface in the side of hydraulic jack, hydraulic jack and is provided with jack loading axis, and metal cylinder top exceptionally Surface Machining has the groove graduated scale of one week measurement top half rock sample anglec of rotation, 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 field, and in particular to a kind of face of measurement coarse structure indirectly is dynamically firm
The device of degree.
Background technology
When earthquake or underground explosion occur, its energy part produced travels to surrounding rock body in the form of stress wave
In.Substantial amounts of no-continuous discontinuity is generally there is in nature rock mass, when stress wave runs into these structures in communication process
During face, its amplitude decays, phase change, frequency reduction.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 generally portrayed by the dynamic rate of structural plane.Therefore, structural plane
Effective measurement of dynamic rate propagates analysis model for setting up stress wave in rock mass, and applied to rock mass earthquake geological hazard
Prevention and evaluation have great importance.
The experiment of rock test piece indoor dynamic is the important channel for testing coarse structure face dynamic rate.Due to laboratory experiment
Stress and deformation directly using traditional split hopkinson bar (SHPB) test coarse structure face under dynamic action is logical
It is often more complicated, and the result poor repeatability that same coarse structure face is repeatedly measured, therefore measurement is preferred experiment side indirectly
Method.
The dynamic rate in coarse structure face is generally relevant with the stress state and the degree of agreement of structural plane residing for it.Due to
Device still not used for indirect measurement coarse structure face at present, thus urgently develop it is a kind of can be while considering coarse structure face
The device and its method of testing of the indirect measurement structure face dynamic rate of stress state and degree of agreement.
The content of the invention
To solve the above problems, the invention provides a kind of device of indirect measurement coarse structure face dynamic rate, utilizing
The device and its method of testing can measure dynamic of the coarse structure face under different stress and under different matching coefficients just
Degree.
To achieve the above object, the technical scheme taken of the present invention is：
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 includes crossbeam, column, crossbeam inverse force axis, jack loading axis, hydraulic jack
Top, hydralic pressure gauge, pressurized handgrip and pedestal, rock sample constraint sleeve include metal cylinder and bolt, and ultrasound test system includes transmitting
Transducer, receive transducer and supersonic wave test instrument, the column are connected with crossbeam and pedestal by nut respectively, the hydraulic pressure
Jack is placed on the center of pedestal, and the two passes through the bolt connection at two ends；Hydralic pressure gauge is arranged on the one of hydraulic jack
Top surface is provided with jack loading axis in side, hydraulic jack, and metal cylinder top exceptionally Surface Machining has one week measurement first half
Divide the groove graduated scale of the rock sample anglec of rotation, scale is uniformly distributed, 20 ° of master calibration interval；Four are partly processed under metal cylinder
Symmetrical screwed hole, the latter half rock sample can be effectively fixed by tightening bolt；Transmitting transducer abuts crossbeam inverse force axis
With top half rock sample, receive transducer abuts jack loading axis and the latter half rock sample；Crossbeam inverse force axis, transmitting transducing
Device, top half rock sample, the latter half rock sample, the axis of receive transducer and jack loading axis are overlapped, to ensure to load
Stability in journey.Jack loading axis is moved up by continuously pressing pressurized handgrip, normal force is applied to rock sample, so that
The different stress in coarse structure face is realized, the numerical value of pressure is recorded by hydralic pressure gauge.
Preferably, the transmitting transducer and receive transducer are by cylindrical high-strength alloy outer steel shell, piezoelectric ceramics
Piece, bottom surface cover plate composition；The natural frequency of vibration of the piezoelectric ceramic piece of two transducers 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 processing is leaded to pour out hole, and side wall, which is machined with, to be drawn
Line leading-out terminal, the other end of 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；During test, crossbeam inverse force axis and jack loading axis are inserted into the groove of two transducers,
To ensure the overall stability in loading procedure of transducer, rock sample and sleeve；The inside of transmitting transducer and receive transducer
Processing is leaded to pour out hole, and side wall processes leaded leading-out terminal.
Preferably, the crossbeam, column, crossbeam inverse force axis and pedestal are processed by high strength alloy steel.
Preferably, the crossbeam be machined near cuboid using square as bottom surface, its two ends two it is symmetrical
Penetrate cylindrical hole, its middle part with crossbeam inverse force axis weld；Crossbeam inverse force axis is the width of short cylinder, its basal diameter and crossbeam
Degree is identical；The quantity of the column is two, is cylinder, its main diameter is identical with the width of crossbeam, adds at its two ends
Work is into helicitic texture, the diameter for being directly slightly less than crossbeam two ends cylindrical hole of thread segment；Pedestal both sides symmetrical machining two is penetrated
Cylindrical hole, its diameter is identical with the diameter of crossbeam two ends cylindrical hole；Distance and crossbeam two terminal circle on pedestal between two cylindrical holes
Distance between post holes is identical；
Preferably, connected, be machined between two columns of pedestal by nut between the column and crossbeam and pedestal
Two symmetrical roundlet cylindricalitys penetrate screwed hole, and its center and the center of the large cylindrical screwed hole at column are maintained at same
On bar straight line, pedestal and hydraulic jack are by being set in the bolt connections of two roundlet cylindricality screwed holes.
Preferably, the metal cylinder is processed by high strength alloy steel, and its thickness is 1-2cm, and its height is rock to be measured
The 2/3 of body height of specimen, its internal diameter is slightly larger than the diameter of rock test piece to be measured；Metal cylinder lower end is machined with four symmetrical point
The cylinder of cloth penetrates screwed hole.The rock test piece containing coarse structure face is put into rock sample constraint sleeve during test, it is ensured that
The length that sample is exposed at metal cylinder two ends is of substantially equal, and fixed rock sample the latter half is pushed against by twisting bolt, and top half
It is freely rotatable and obtains different structural plane matching coefficients.
Patent of the present invention 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 in coarse structure face can be obtained by crossing rotation top half rock sample, so as to can realize while considering coarse structure face
The measurement of dynamic rate under the conditions of same different stress, different degree of agreements.
Brief description of the drawings
Fig. 1 is device total arrangement structural representation of the embodiment of the present invention.
Fig. 2 is the oblique view of the attachment structure of metal cylinder, rock sample and bolt in the embodiment of the present invention.
Fig. 3 is the top view of the attachment structure of metal cylinder, rock sample and bolt in the embodiment of the present invention.
Fig. 4 is the vertical cross section figure of the attachment structure of metal cylinder, rock sample and bolt in the embodiment of the present invention.
Fig. 5 is the transverse cross-sectional view of the attachment structure of metal cylinder, 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 be the embodiment of the present invention in using window function separate superposition ripple principle schematic.
Fig. 8 is the centre frequency of FFT calculating separation postwaves in the embodiment of the present invention.
Fig. 9 is the coarse structure face in the case of being fitted like a glove in the embodiment of the present invention.
Figure 10 is the coarse structure face in the case of not exclusively being coincide in the embodiment of the present invention.
Specific implementation
In order that objects and advantages of the present invention are more clearly understood, the present invention is carried out with reference to embodiments further
Describe 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 embodiments of the invention provide a kind of device of indirect measurement coarse structure face dynamic rate,
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 constraint sleeve includes metal cylinder 6 and bolt 7, and ultrasound test system includes transmitting transducer 4, the and of receive transducer 9
Supersonic wave test instrument 15, the column 2 is connected with crossbeam 1 and pedestal 14 by nut respectively, and the hydraulic jack 11 is placed
In the center of pedestal 14, the two passes through the bolt connection at two ends；Hydralic pressure gauge 12 is arranged on the side of hydraulic jack 11, liquid
Top surface is provided with jack loading axis 10 on pressure jack 11, and the top of metal cylinder 6 exceptionally Surface Machining has one week measurement first half
Divide the groove graduated scale of the anglec of rotation of rock sample 5, scale is uniformly distributed, 20 ° of master calibration interval；6 times part processing four of metal cylinder
Individual symmetrical screwed hole, the latter half rock sample 8 can be effectively fixed by tightening bolt 7；It is anti-that transmitting transducer 4 abuts crossbeam
Power axle 3 and top half rock sample 5, receive transducer abut 9 jack loading axis 10 and the latter half rock sample 8；Crossbeam inverse force axis
3rd, the axis weight of transmitting transducer 4, top half rock sample 5, the latter half rock sample 8, receive transducer 9 and jack loading axis 9
Close, to ensure 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, so as 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 receive transducer 9 are by cylindrical high-strength alloy outer steel shell, piezoelectric ceramic piece, bottom
Surface cover is constituted；The natural frequency of vibration of the piezoelectric ceramic piece of two transducers 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 processing is leaded to pour out hole, and wall processing in side is leaded to be led
Go out terminal, the other end of 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；During test, crossbeam inverse force axis 3 and jack loading axis 10 are inserted into the recessed of two transducers
In groove, to ensure the overall stability in loading procedure of transducer, rock sample and sleeve；Transmitting transducer 4 and receive transducer 9
Inside processing it is leaded pour out hole, side wall processes leaded leading-out terminal.
The crossbeam 1, column 2, crossbeam inverse force axis 3 and pedestal 14 are processed by high strength alloy steel.
The crossbeam 1 is to be machined with two near cuboid using square as bottom surface, its two ends symmetrical to penetrate
Welded with crossbeam inverse force axis 3 at cylindrical hole, its middle part；Crossbeam inverse force axis 3 is short cylinder, the width of its basal diameter and crossbeam 1
It is identical；The quantity of the column 2 is two, is cylinder, its main diameter is identical with the width of crossbeam 1, adds at its two ends
Work is into helicitic texture, the diameter for being directly slightly less than the two ends cylindrical hole of crossbeam 1 of thread segment；4 both sides symmetrical machining of pedestal two is worn
Saturating cylindrical hole, its diameter is identical with the diameter of the two ends cylindrical hole of crossbeam 1；1 liang of distance and crossbeam on pedestal 4 between two cylindrical holes
Hold the distance between cylindrical hole identical；
Connected, be machined between two columns 2 of pedestal 14 by nut between the column 2 and crossbeam 1 and pedestal 14
Two symmetrical roundlet cylindricalitys penetrate screwed hole, and its center and the center of the large cylindrical screwed hole at column 2 are maintained at same
On straight line, pedestal 14 and hydraulic jack 11 are by being set in the bolt connections of two roundlet cylindricality screwed holes.
The metal cylinder 6 is processed by high strength alloy steel, and its thickness is 1-2cm, and its height is rock test piece to be measured
The 2/3 of height, its internal diameter is slightly larger than the diameter of rock test piece to be measured；The lower end of metal cylinder 6 be machined with four it is symmetrical
Cylinder penetrates screwed hole.As shown in Figure of description 4- Fig. 5, the rock test piece containing coarse structure face is put into rock during test
In sample constraint sleeve, it is ensured that the length that sample is exposed at the two ends of metal cylinder 6 is of substantially equal, fixed rock sample is pushed against by twisting bolt 7
The latter half, and top half is freely rotatable and obtains different structural plane matching coefficients.
Method of testing
Using indirectly testing coarse structure face dynamic rate of the present invention principle be according to ultrasonic wave by structural plane after
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 are the impedance of rock in formula, and ρ is rock density, the velocity of wave of c rocks, and the π f of ω=2 are the angle of incident ultrasound wave
Frequency, f is the frequency of incidence wave.
The expression formula that can obtain dynamic rate by (1) formula is
From (2) as long as to can be seen that the centre frequency for having measured incidence wave, the wave impedance of rock and ultrasonic wave pass through thick for formula
The transmission coefficient of rough structural plane, it is possible to which counterplot calculates its dynamic rate.Wherein transmission coefficient be defined as ultrasonic wave perpendicular through
Amplitude after the rock test piece of the face of coarse structure containing wall scroll passes through the ratio between amplitude after the complete rock sample of equal length with ultrasonic wave.
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 that sample is exposed at holding two ends is of substantially equal.In the end of rock sample
One layer of vacuum grease is smeared, to have good coupling between guarantee and transducer, is then consolidated complete rock sample by bolt 7
It is fixed.
Crossbeam inverse force axis 3 and jack loading axis 10 are inserted transmitting transducer 4 and the end of receive transducer 9 by S3 respectively
In cylinder shape groove.The metal cylinder 6 for securing rock sample is placed in the middle of two transducers, applies pre- by jack pair test specimen
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 is the reading of jack pressure table.
S4 supersonic wave test instruments give transmitting transducer 4 one driving voltage signals, cause its piezoelectric ceramic piece to produce machinery
Vibration signal.Vibration signal is changed by wave amplitude, frequency etc. after test specimen, reaches receive transducer 9, causes its piezoelectricity to be made pottery
Ceramics produces voltage signal.
S5 supersonic wave test instruments record and preserved down the voltage signal received, and sending out signals are recorded for calculating incidence wave
Centre frequency and amplitude.Because the length of test specimen in test process is shorter, the transmission waveform received by receive transducer is
Preliminary wave and the rear superposition to ripple Bu Tong then formed in interface multiple reflections.In order to obtain the width of true incidence wave
Value, it should to being overlapped the separation of ripple by the transmitted wave after complete rock sample test piece with the influence after eliminating to ripple.Using 1/4
Cycle Cosine window function metht is overlapped the separation of ripple, and such as specific implementation steps of Figure of description 7 are：A is opened from oscillation starting points
The waveform for beginning to choose one section of Fixed Time Interval is usually a periodic waveform as pending signal；B is constructed within this time
Amplitude is used as window function for the cosine function in 1 1/4 cycle；Window function is multiplied by c with pending signal can obtain just
The incidence wave signal of beginning.Waveform after separating can obtain the amplitude A of original incident ripple0, pass through such as institute of specification annex map 8
Show that fast Fourier analysis FFT can obtain the frequency f of original incident ripple, angular frequency is obtained so as to calculate.
S6 changes complete rock sample into the rock test piece in the face of coarse structure containing wall scroll, keeps experiment condition constant, repeats S2-
S5, obtains ultrasonic wave and passes through the transmission wave amplitude A behind wall scroll coarse structure face1.It is worth noting that the Chief Signal Boatswain now chosen
It is identical when degree is with complete sample.Transmission coefficient is obtained it is possible thereby to calculate
According to obtained transmission coefficient t, wave impedance z and angular frequency, coarse structure face can be calculated by formula (2)
Dynamic rate.
S7, by the way that 3 points curved or vertical pulling experiment obtains coarse structure face, such as Figure of description 9 is by coarse structure face by broken
The complete split of broken face obtains the coarse structure interview part that matching coefficient is 1, and draws the datum line of one and diameter parallel in side.
Then using the method shown in Figure of description 10, the test specimen containing the coarse structure face fitted like a glove is put into metal cylinder 5, led to
Cross four bolts and fix the latter half rock sample 8.By make 10 ° of 5 anglec of rotation of top half rock sample, 20 °, 30 ° ... 360 °, can obtain
To the coarse structure face of different matching coefficients.
Embodiment
For the more detailed method of testing for introducing indirectly testing structural plane dynamic rate of the present invention, one is described below
Specific embodiment.Test specimen is processed 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 is ρ=2600kg/m3, P- wave impedance z=1.326 × 10 for obtaining 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 progress of record is handled to the amplitude A for obtaining incidence wave0=0.886V, centre frequency f=68kHz, can be calculated
Go out angular frequency=1.36 × 105rad/s.Then 1MPa, 2MPa are applied to the test specimen of the structural plane containing wall scroll as shown in Figure 7
With 3MPa normal pressure, and the waveform of record is handled by Fig. 7 and Fig. 8 method.Measure the transmission under three kinds of operating modes
The amplitude of ripple is respectively 0.655V, 0.718V and 0.766V, thus can calculate obtain corresponding transmission coefficient be respectively 0.74,
0.81 and 0.86.According to (2) formula, the dynamic normal stiffness k of structural plane under 1MPa, 2MPa and 3MPa can be calculatednRespectively equal to
3420Gpa/m, 4580GPa/m and 5720GPa/m.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (6)
1. a kind of device of indirect measurement coarse structure face dynamic rate, it is characterised in that including counter-force loading frame, rock sample about
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 constraint sleeve bag
Metal cylinder (6) and bolt (7) are included, ultrasound test system includes transmitting transducer (4), receive transducer (9) and ultrasound
Instrument (15) is tried, the column (2) is connected with crossbeam (1) and pedestal (14) by nut respectively, and the hydraulic jack (11) is put
The center in pedestal (14) is put, the two passes through the bolt connection at two ends；Hydralic pressure gauge (12) is arranged on hydraulic jack (11)
Side, top surface is provided with jack loading axis (10) in hydraulic jack (11), and metal cylinder (6) top exceptionally Surface Machining has
The groove graduated scale of one week measurement top half rock sample (5) anglec of rotation, scale is uniformly distributed, 20 ° of master calibration interval；Metal
Four symmetrical screwed holes are partly processed under cylinder (6), the latter half rock sample (8) can be effectively fixed by tightening bolt (7)；
Transmitting transducer (4) abuts crossbeam inverse force axis (3) and top half rock sample (5), and receive transducer abuts (9) jack loading axis
And the latter half rock sample (8) (10)；Crossbeam inverse force axis (3), transmitting transducer (4), top half rock sample (5), the latter half rock
The axis of sample (8), receive transducer (9) and jack loading axis (9) is overlapped.
2. a kind of device of indirect measurement coarse structure face dynamic rate as claimed in claim 1, it is characterised in that the hair
Transducer (4) and receive transducer (9) is penetrated to constitute by cylindrical high-strength alloy outer steel shell, piezoelectric ceramic piece, bottom surface cover plate；
The natural frequency of vibration of the piezoelectric ceramic piece of two transducers is identical, inside the cylinder shape groove for being placed on cylindrical shell end, so
Pass through bottom surface cover plate for sealing afterwards；Cylindrical housing interior processing is leaded to pour out hole, and side wall processes leaded 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 indirect measurement coarse structure face dynamic rate as claimed in claim 1, it is characterised in that the horizontal stroke
Beam (1), column (2), crossbeam inverse force axis (3) and pedestal (14) are processed by high strength alloy steel.
4. a kind of device of indirect measurement coarse structure face dynamic rate as claimed in claim 1, it is characterised in that the horizontal stroke
Beam (1) be machined near cuboid using square as bottom surface, its two ends two it is symmetrical penetrate cylindrical hole, its middle part
Welded with crossbeam inverse force axis (3)；Crossbeam inverse force axis (3) is short cylinder, and its basal diameter is identical with the width of crossbeam (1)；Institute
The quantity for stating column (2) is two, is cylinder, its main diameter is identical with the width of crossbeam (1), is processed at its two ends
Helicitic texture, the diameter for being directly slightly less than crossbeam (1) two ends cylindrical hole of thread segment；Pedestal (4) both sides symmetrical machining two is worn
Saturating cylindrical hole, its diameter is identical with the diameter of crossbeam (1) two ends cylindrical hole；Distance and horizontal stroke on pedestal (4) between two cylindrical holes
Distance between the cylindrical hole of beam (1) two ends is identical.
5. a kind of device of indirect measurement coarse structure face dynamic rate as claimed in claim 1, it is characterised in that described vertical
It is connected, is machined between two columns (2) of pedestal (14) symmetrical by nut between post (2) and crossbeam (1) and pedestal (14)
Two roundlet cylindricalitys of distribution penetrate screwed hole, and its center and the center of the large cylindrical screwed hole at column (2) place are maintained at same
On bar straight line, pedestal (14) and hydraulic jack (11) are by being set in the bolt connections of two roundlet cylindricality screwed holes.
6. a kind of device of indirect measurement coarse structure face dynamic rate as claimed in claim 1, it is characterised in that the gold
Category cylinder (6) is processed by high strength alloy steel, and its thickness is 1-2cm, and its height is the 2/3 of rock test piece height to be measured, its
Internal diameter is slightly larger than the diameter of rock test piece to be measured；Metal cylinder (6) lower end is machined with four symmetrical cylinders and penetrated
Screwed hole.
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Cited By (5)
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| CN107796711A (en) * | 2017-09-20 | 2018-03-13 | 天津大学 | A kind of method for testing complete sample and structural plane dynamic shear strength |
| CN109100423A (en) * | 2018-10-15 | 2018-12-28 | 吉林大学 | Damage of rock test experimental bed under a kind of ultrasonic activation |
| CN109680970A (en) * | 2018-12-29 | 2019-04-26 | 上海广联环境岩土工程股份有限公司 | Steel column verticality method for correcting error |
| 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 |
| CN115710791A (en) * | 2022-11-21 | 2023-02-24 | 河南逸祥卫生科技有限公司 | Production process of disposable underpants |
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